TY  - CONF
AU  - Arsić, Aleksandra
AU  - Flajs, Željko
AU  - Gašić, Vlada
AU  - Zrnić, Nenad
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7288
AB  - A numerical analysis of welded connection between two steel structures is performed with the usage of the finite element approach. A frame stage‐like structure is placed between the main horizontal girders of the structure of the hall. A visual inspection of the frame revealed numerous irregularities of welds which brought demand for redesign and overall check. The emphasis in this paper is comparative calculation of initial and redesigned welded end‐joints, without imposing the optimal technical solution. It is used modern and particular finite element software for calculation of welded joints. The values of stresses in the welded joint as well in plates and members are lower than the permitted values for both models. However, the influence on the main structure is reduced with redesigned technical solution. The level of stresses is lower along with reduction of rotational stiffness of the joint. This can be considered as a relief to the main girders of the hall structure and should be a cost and a goal for supporting any additional structure.
PB  - University of Banja Luka Faculty of Mechanical Engineering
C3  - 16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023
T1  - Finite element calculation of redesigned welded joint at support for frame stage‐like structure
EP  - 516
SP  - 511
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7288
ER  - 

@conference{
author = "Arsić, Aleksandra and Flajs, Željko and Gašić, Vlada and Zrnić, Nenad",
year = "2023",
abstract = "A numerical analysis of welded connection between two steel structures is performed with the usage of the finite element approach. A frame stage‐like structure is placed between the main horizontal girders of the structure of the hall. A visual inspection of the frame revealed numerous irregularities of welds which brought demand for redesign and overall check. The emphasis in this paper is comparative calculation of initial and redesigned welded end‐joints, without imposing the optimal technical solution. It is used modern and particular finite element software for calculation of welded joints. The values of stresses in the welded joint as well in plates and members are lower than the permitted values for both models. However, the influence on the main structure is reduced with redesigned technical solution. The level of stresses is lower along with reduction of rotational stiffness of the joint. This can be considered as a relief to the main girders of the hall structure and should be a cost and a goal for supporting any additional structure.",
publisher = "University of Banja Luka Faculty of Mechanical Engineering",
journal = "16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023",
title = "Finite element calculation of redesigned welded joint at support for frame stage‐like structure",
pages = "516-511",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7288"
}

Arsić, A., Flajs, Ž., Gašić, V.,& Zrnić, N.. (2023). Finite element calculation of redesigned welded joint at support for frame stage‐like structure. in 16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023
University of Banja Luka Faculty of Mechanical Engineering., 511-516.
https://hdl.handle.net/21.15107/rcub_machinery_7288

Arsić A, Flajs Ž, Gašić V, Zrnić N. Finite element calculation of redesigned welded joint at support for frame stage‐like structure. in 16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023. 2023;:511-516.
https://hdl.handle.net/21.15107/rcub_machinery_7288 .

Arsić, Aleksandra, Flajs, Željko, Gašić, Vlada, Zrnić, Nenad, "Finite element calculation of redesigned welded joint at support for frame stage‐like structure" in 16th International Conference on Accomplishments in Mechanical and Industrial Engineering - DEMI 2023 (2023):511-516,
https://hdl.handle.net/21.15107/rcub_machinery_7288 .

TY  - CONF
AU  - Gašić, Vlada
AU  - Arsić, Aleksandra
AU  - Zrnić, Nenad
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7283
AB  - The paper deals with strength of load-carrying fillet welds with application of two different approaches. First one is calculation by classical/scholar approach while second one is devoted to finite element analysis. The classical approach is concerned with national and European engineering practice. The finite element approach includes the application of particular tool which preserves main recommendations from modern postulations in design of joints. The object of interest is welded beam-to-column joint with different structural elements and the stresses are obtained for two models. It is investigated correlation of results of weld stresses from both the approaches. Direct matching of results was neither expected nor found but basic correlation is revealed within the joint behaviour under loadings. Considering finite element approach as prevailing, its advantage is clearly shown throughout inclusion of local effects of plates. However, classical approach is essential for proper understanding of joint behaviour and should be always the first step in structural analysis. The usage of at least two different approaches is one way of improving safety checks in engineering and stands for purpose of validation or verification of design.
PB  - Faculty of Mechanical and Civil Engineering in Kraljevo
C3  - XI International Conference Heavy Machinery - HM 2023
T1  - Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach
EP  - A.8
SP  - A.1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7283
ER  - 

@conference{
author = "Gašić, Vlada and Arsić, Aleksandra and Zrnić, Nenad",
year = "2023",
abstract = "The paper deals with strength of load-carrying fillet welds with application of two different approaches. First one is calculation by classical/scholar approach while second one is devoted to finite element analysis. The classical approach is concerned with national and European engineering practice. The finite element approach includes the application of particular tool which preserves main recommendations from modern postulations in design of joints. The object of interest is welded beam-to-column joint with different structural elements and the stresses are obtained for two models. It is investigated correlation of results of weld stresses from both the approaches. Direct matching of results was neither expected nor found but basic correlation is revealed within the joint behaviour under loadings. Considering finite element approach as prevailing, its advantage is clearly shown throughout inclusion of local effects of plates. However, classical approach is essential for proper understanding of joint behaviour and should be always the first step in structural analysis. The usage of at least two different approaches is one way of improving safety checks in engineering and stands for purpose of validation or verification of design.",
publisher = "Faculty of Mechanical and Civil Engineering in Kraljevo",
journal = "XI International Conference Heavy Machinery - HM 2023",
title = "Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach",
pages = "A.8-A.1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7283"
}

Gašić, V., Arsić, A.,& Zrnić, N.. (2023). Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach. in XI International Conference Heavy Machinery - HM 2023
Faculty of Mechanical and Civil Engineering in Kraljevo., A.1-A.8.
https://hdl.handle.net/21.15107/rcub_machinery_7283

Gašić V, Arsić A, Zrnić N. Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach. in XI International Conference Heavy Machinery - HM 2023. 2023;:A.1-A.8.
https://hdl.handle.net/21.15107/rcub_machinery_7283 .

Gašić, Vlada, Arsić, Aleksandra, Zrnić, Nenad, "Strength of Fillet-welded Joint Connections: Comments on Correlation Between Classical and Particular Finite Element Approach" in XI International Conference Heavy Machinery - HM 2023 (2023):A.1-A.8,
https://hdl.handle.net/21.15107/rcub_machinery_7283 .

TY  - CONF
AU  - Zrnić, Nenad
AU  - Đorđević, Miloš
AU  - Gašić, Vlada
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3831
AB  - The paper discusses the history of belt conveyors over the years until the development of the modern belt conveyor at the end of the 19th century. The roots of conveyor systems and principles of operation go back to the ancient times, with a first trace of primitive belt conveyor found in the beginning of the 17th century. The early belt conveyors can be found in the late 18th century due to the invention of Oliver Evans in USA and in the 19th century, by Lyster in England and Lopatine in Russia. The first modern solution of the heavy-duty belt conveyor was proposed by Thomas Robins in the last decade of the 19th century, with the basic principles of operation which remain unchanged up to now.
PB  - Springer Science and Business Media B.V.
C3  - History of Mechanism and Machine Science
T1  - History of Belt Conveyors Until the End of the 19th Century
EP  - 223
SP  - 210
VL  - 40 HMMS
DO  - 10.1007/978-3-030-98499-1_18
ER  - 

@conference{
author = "Zrnić, Nenad and Đorđević, Miloš and Gašić, Vlada",
year = "2022",
abstract = "The paper discusses the history of belt conveyors over the years until the development of the modern belt conveyor at the end of the 19th century. The roots of conveyor systems and principles of operation go back to the ancient times, with a first trace of primitive belt conveyor found in the beginning of the 17th century. The early belt conveyors can be found in the late 18th century due to the invention of Oliver Evans in USA and in the 19th century, by Lyster in England and Lopatine in Russia. The first modern solution of the heavy-duty belt conveyor was proposed by Thomas Robins in the last decade of the 19th century, with the basic principles of operation which remain unchanged up to now.",
publisher = "Springer Science and Business Media B.V.",
journal = "History of Mechanism and Machine Science",
title = "History of Belt Conveyors Until the End of the 19th Century",
pages = "223-210",
volume = "40 HMMS",
doi = "10.1007/978-3-030-98499-1_18"
}

Zrnić, N., Đorđević, M.,& Gašić, V.. (2022). History of Belt Conveyors Until the End of the 19th Century. in History of Mechanism and Machine Science
Springer Science and Business Media B.V.., 40 HMMS, 210-223.
https://doi.org/10.1007/978-3-030-98499-1_18

Zrnić N, Đorđević M, Gašić V. History of Belt Conveyors Until the End of the 19th Century. in History of Mechanism and Machine Science. 2022;40 HMMS:210-223.
doi:10.1007/978-3-030-98499-1_18 .

Zrnić, Nenad, Đorđević, Miloš, Gašić, Vlada, "History of Belt Conveyors Until the End of the 19th Century" in History of Mechanism and Machine Science, 40 HMMS (2022):210-223,
https://doi.org/10.1007/978-3-030-98499-1_18 . .

TY  - CONF
AU  - Arsić, Aleksandra
AU  - Gašić, Vlada
AU  - Zrnić, Nenad
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4373
AB  - This paper gives survey on up-to-date studies which deal with numerical simulations of bolted end-plate moment connections. The selection is performed with the aim to cover different design concepts which reflect the problem of joint behaviour in general. Main characteristics of joint design and corresponding analysis features are presented in tabular form intended to serve as guidance for appropriate modelling of bolted 
end-plate connections. Consequently, the procedure for conducting numerical simulation in proper mode is proposed by authors. An illustrative example-case study of analysis of a extended stiffened end-plate bolted beam-to-column joint is shown. The design case is modelled with two finite element software packages which have different approaches and levels of complexity. Finally, the analytical calculation of this joint is done according to Eurocode 3 with the aim of validation. The moment-rotation curve, as a basis in this field, is obtained for each model. The results from numerical simulations with both the approaches are in good correlation. Basic characteristics of two mentioned design approaches are also explained as an orientation for engineers and reserchers in this field.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of XXIV International Conference on "Material Handling, Constructions and Logistics" - MHCL 2022
T1  - Survey on Design Procedures in Numerical Simulations of End-plate Moment Connections
EP  - 150
SP  - 143
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4373
ER  - 

@conference{
author = "Arsić, Aleksandra and Gašić, Vlada and Zrnić, Nenad",
year = "2022",
abstract = "This paper gives survey on up-to-date studies which deal with numerical simulations of bolted end-plate moment connections. The selection is performed with the aim to cover different design concepts which reflect the problem of joint behaviour in general. Main characteristics of joint design and corresponding analysis features are presented in tabular form intended to serve as guidance for appropriate modelling of bolted 
end-plate connections. Consequently, the procedure for conducting numerical simulation in proper mode is proposed by authors. An illustrative example-case study of analysis of a extended stiffened end-plate bolted beam-to-column joint is shown. The design case is modelled with two finite element software packages which have different approaches and levels of complexity. Finally, the analytical calculation of this joint is done according to Eurocode 3 with the aim of validation. The moment-rotation curve, as a basis in this field, is obtained for each model. The results from numerical simulations with both the approaches are in good correlation. Basic characteristics of two mentioned design approaches are also explained as an orientation for engineers and reserchers in this field.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of XXIV International Conference on "Material Handling, Constructions and Logistics" - MHCL 2022",
title = "Survey on Design Procedures in Numerical Simulations of End-plate Moment Connections",
pages = "150-143",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4373"
}

Arsić, A., Gašić, V.,& Zrnić, N.. (2022). Survey on Design Procedures in Numerical Simulations of End-plate Moment Connections. in Proceedings of XXIV International Conference on "Material Handling, Constructions and Logistics" - MHCL 2022
University of Belgrade, Faculty of Mechanical Engineering., 143-150.
https://hdl.handle.net/21.15107/rcub_machinery_4373

Arsić A, Gašić V, Zrnić N. Survey on Design Procedures in Numerical Simulations of End-plate Moment Connections. in Proceedings of XXIV International Conference on "Material Handling, Constructions and Logistics" - MHCL 2022. 2022;:143-150.
https://hdl.handle.net/21.15107/rcub_machinery_4373 .

Arsić, Aleksandra, Gašić, Vlada, Zrnić, Nenad, "Survey on Design Procedures in Numerical Simulations of End-plate Moment Connections" in Proceedings of XXIV International Conference on "Material Handling, Constructions and Logistics" - MHCL 2022 (2022):143-150,
https://hdl.handle.net/21.15107/rcub_machinery_4373 .

TY  - JOUR
AU  - Zrnić, Nenad
AU  - Đorđević, Miloš
AU  - Gašić, Vlada
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4808
AB  - The evolution of belt conveyors, as an important type of continuous conveying machinery,
is examined here in a historical perspective. For this purpose, the selected period is from
the ancient time, i.e. occurrence of conveying equipment, and up to the end of the nineteenth
century. The basic postulation of a modern machine, including conveyors, is often
interlinked to that of its ancestor, which may be simple and primitive. Ancient machines
and principles of their work were the basis for later improvements which also brought the
inventions in engineering. For instance, Archimedes lifted water to high altitude with a
screw, which was regarded as the ancestor of today’s screw conveyor and essentially his
design has not changed since then. Bucket elevators also have their predecessors dating
back to ancient times. In the concrete case of belt conveyors, a first trace can be found in
the beginning of the seventeenth century, even classified as primitive example. During the
Industrial Revolutions, various machines, such conveyors, appeared. The first modern-like
belt conveyors are dedicated to the late eighteenth century due to the invention of Oliver
Evans in USA and to the nineteenth century, by Lyster in England, Lopatine in Russia and
Thomas Robins in USA. The technical solutions developed by the end of the nineteenth
century were forerunners of the today’s belt conveyors, while the key operational principles
have not changed.
PB  - Springer Nature
T2  - Foundations of Science
T1  - Historical Background and Evolution of Belt Conveyors
DO  - 10.1007/s10699-022-09894-6
ER  - 

@article{
author = "Zrnić, Nenad and Đorđević, Miloš and Gašić, Vlada",
year = "2022",
abstract = "The evolution of belt conveyors, as an important type of continuous conveying machinery,
is examined here in a historical perspective. For this purpose, the selected period is from
the ancient time, i.e. occurrence of conveying equipment, and up to the end of the nineteenth
century. The basic postulation of a modern machine, including conveyors, is often
interlinked to that of its ancestor, which may be simple and primitive. Ancient machines
and principles of their work were the basis for later improvements which also brought the
inventions in engineering. For instance, Archimedes lifted water to high altitude with a
screw, which was regarded as the ancestor of today’s screw conveyor and essentially his
design has not changed since then. Bucket elevators also have their predecessors dating
back to ancient times. In the concrete case of belt conveyors, a first trace can be found in
the beginning of the seventeenth century, even classified as primitive example. During the
Industrial Revolutions, various machines, such conveyors, appeared. The first modern-like
belt conveyors are dedicated to the late eighteenth century due to the invention of Oliver
Evans in USA and to the nineteenth century, by Lyster in England, Lopatine in Russia and
Thomas Robins in USA. The technical solutions developed by the end of the nineteenth
century were forerunners of the today’s belt conveyors, while the key operational principles
have not changed.",
publisher = "Springer Nature",
journal = "Foundations of Science",
title = "Historical Background and Evolution of Belt Conveyors",
doi = "10.1007/s10699-022-09894-6"
}

Zrnić, N., Đorđević, M.,& Gašić, V.. (2022). Historical Background and Evolution of Belt Conveyors. in Foundations of Science
Springer Nature..
https://doi.org/10.1007/s10699-022-09894-6

Zrnić N, Đorđević M, Gašić V. Historical Background and Evolution of Belt Conveyors. in Foundations of Science. 2022;.
doi:10.1007/s10699-022-09894-6 .

Zrnić, Nenad, Đorđević, Miloš, Gašić, Vlada, "Historical Background and Evolution of Belt Conveyors" in Foundations of Science (2022),
https://doi.org/10.1007/s10699-022-09894-6 . .

TY  - JOUR
AU  - Olszyna, Grzegorz
AU  - Gašić, Vlada
AU  - Tytko, Andrzej
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/100
AB  - Steel ropes are widely used in material handling machines. The excessive wear of wires is often presented as a type of rope degradation. One of many indicators of the wear is abrasion, corrosion and fatigue cracks. Within this class of rope degradation, the main representation of wear is wire abrasion in the layers of the external wires. This is especially noticeable at the steel ropes which are operating in the drum devices with multilayer winding and in hoists of mining shafts. Over performed work cycles, the estimation of losses in rope cross-section is important for the calculation of the rope capacity. Abrasive wear of external wires is a relatively easy phenomenon to detect with a qualitative interpretation. However, it is a very difficult phenomenon to quantify. The aim of this article is to address this issue. A brief survey of usual methods for rope inspections is given, which can serve as practical guidance for the engineers in this field. With accompanying case study, it presented the advantages of magnetic method in rope inspections oriented towards measuring the changes of wires within the wear assessment.
PB  - Sage Publications Ltd, London
T2  - Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology
T1  - Some aspects on quantification of the wear at steel wire ropes
DO  - 10.1177/13506501211051687
ER  - 

@article{
author = "Olszyna, Grzegorz and Gašić, Vlada and Tytko, Andrzej",
year = "2021",
abstract = "Steel ropes are widely used in material handling machines. The excessive wear of wires is often presented as a type of rope degradation. One of many indicators of the wear is abrasion, corrosion and fatigue cracks. Within this class of rope degradation, the main representation of wear is wire abrasion in the layers of the external wires. This is especially noticeable at the steel ropes which are operating in the drum devices with multilayer winding and in hoists of mining shafts. Over performed work cycles, the estimation of losses in rope cross-section is important for the calculation of the rope capacity. Abrasive wear of external wires is a relatively easy phenomenon to detect with a qualitative interpretation. However, it is a very difficult phenomenon to quantify. The aim of this article is to address this issue. A brief survey of usual methods for rope inspections is given, which can serve as practical guidance for the engineers in this field. With accompanying case study, it presented the advantages of magnetic method in rope inspections oriented towards measuring the changes of wires within the wear assessment.",
publisher = "Sage Publications Ltd, London",
journal = "Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology",
title = "Some aspects on quantification of the wear at steel wire ropes",
doi = "10.1177/13506501211051687"
}

Olszyna, G., Gašić, V.,& Tytko, A.. (2021). Some aspects on quantification of the wear at steel wire ropes. in Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology
Sage Publications Ltd, London..
https://doi.org/10.1177/13506501211051687

Olszyna G, Gašić V, Tytko A. Some aspects on quantification of the wear at steel wire ropes. in Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology. 2021;.
doi:10.1177/13506501211051687 .

Olszyna, Grzegorz, Gašić, Vlada, Tytko, Andrzej, "Some aspects on quantification of the wear at steel wire ropes" in Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology (2021),
https://doi.org/10.1177/13506501211051687 . .

TY  - CONF
AU  - Zrnić, Nenad
AU  - Gašić, Vlada
AU  - Urošević, Marko
AU  - Arsić, Aleksandra
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4369
AB  - The paper deals with the mathematical modelling of the dynamic behavior of the structure of the ship unloader. It is given the procedure for formulation of the reduced dynamic model which retains the main aspects of the behavior of the structure and yet is simple enough to be performed with standard engineering tools. The approach is applied on the real bridge-type grab ship unloader but can also be used on similar complex structures. Initially, the complete structure is modelled with finite element software where the natural frequencies were obtained. This 3D model is reduced to an equivalent plane model of the sea-side part of the boom. The postulation of the analytical approach is based on the model of a simple beam with an overhang where dynamic analysis is concerned with the Rayleigh Ritz method for estimating the adopted admissible functions. The results of the modal analysis of the reduced mathematical model showed a small difference from the results of finite element analysis which stands for the verification of the presented approach.
PB  - Kraljevo : Faculty of Mechanical and Civil Engineering
C3  - Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.
T1  - Finite Element and Analytical Modelling of Ship Unloader
EP  - A.18
SP  - A.13
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4369
ER  - 

@conference{
author = "Zrnić, Nenad and Gašić, Vlada and Urošević, Marko and Arsić, Aleksandra",
year = "2021",
abstract = "The paper deals with the mathematical modelling of the dynamic behavior of the structure of the ship unloader. It is given the procedure for formulation of the reduced dynamic model which retains the main aspects of the behavior of the structure and yet is simple enough to be performed with standard engineering tools. The approach is applied on the real bridge-type grab ship unloader but can also be used on similar complex structures. Initially, the complete structure is modelled with finite element software where the natural frequencies were obtained. This 3D model is reduced to an equivalent plane model of the sea-side part of the boom. The postulation of the analytical approach is based on the model of a simple beam with an overhang where dynamic analysis is concerned with the Rayleigh Ritz method for estimating the adopted admissible functions. The results of the modal analysis of the reduced mathematical model showed a small difference from the results of finite element analysis which stands for the verification of the presented approach.",
publisher = "Kraljevo : Faculty of Mechanical and Civil Engineering",
journal = "Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.",
title = "Finite Element and Analytical Modelling of Ship Unloader",
pages = "A.18-A.13",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4369"
}

Zrnić, N., Gašić, V., Urošević, M.,& Arsić, A.. (2021). Finite Element and Analytical Modelling of Ship Unloader. in Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.
Kraljevo : Faculty of Mechanical and Civil Engineering., A.13-A.18.
https://hdl.handle.net/21.15107/rcub_machinery_4369

Zrnić N, Gašić V, Urošević M, Arsić A. Finite Element and Analytical Modelling of Ship Unloader. in Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.. 2021;:A.13-A.18.
https://hdl.handle.net/21.15107/rcub_machinery_4369 .

Zrnić, Nenad, Gašić, Vlada, Urošević, Marko, Arsić, Aleksandra, "Finite Element and Analytical Modelling of Ship Unloader" in Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021. (2021):A.13-A.18,
https://hdl.handle.net/21.15107/rcub_machinery_4369 .

TY  - JOUR
AU  - Gašić, Vlada
AU  - Arsić, Aleksandra
AU  - Zrnić, Nenad
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3497
AB  - The analysis of behaviour of extended one-sided stiffened bolted end-plate moment connection is revisited here. On the basis of experimental tests, the behaviour of beam-to-column joint with and without stiffener is investigated. The stress distribution and deformation characteristics were determined and discussed with corresponding results of finite element analysis of joint behaviour. Furthermore, the extensive finite element simulations were carried out and the obtained results are discussed in this paper. The main analyzed parameters are the geometrical characteristics of the plates added to the beam-to-column joint. Their influence on joint resistance and stiffness is observed including the possibility of material cost optimization. Overall, the comparison of used approaches confirms their conjoint importance except for the postulation where the stiffener is assumed to behave as a strut in the joint. Also, there are some practical recommendations in design which can be used by engineers.
PB  - Elsevier Science Inc, New York
T2  - Structures
T1  - Strength of extended stiffened end-plate bolted joints: Experimental and numerical analysis
EP  - 89
SP  - 77
VL  - 33
DO  - 10.1016/j.istruc.2021.04.016
ER  - 

@article{
author = "Gašić, Vlada and Arsić, Aleksandra and Zrnić, Nenad",
year = "2021",
abstract = "The analysis of behaviour of extended one-sided stiffened bolted end-plate moment connection is revisited here. On the basis of experimental tests, the behaviour of beam-to-column joint with and without stiffener is investigated. The stress distribution and deformation characteristics were determined and discussed with corresponding results of finite element analysis of joint behaviour. Furthermore, the extensive finite element simulations were carried out and the obtained results are discussed in this paper. The main analyzed parameters are the geometrical characteristics of the plates added to the beam-to-column joint. Their influence on joint resistance and stiffness is observed including the possibility of material cost optimization. Overall, the comparison of used approaches confirms their conjoint importance except for the postulation where the stiffener is assumed to behave as a strut in the joint. Also, there are some practical recommendations in design which can be used by engineers.",
publisher = "Elsevier Science Inc, New York",
journal = "Structures",
title = "Strength of extended stiffened end-plate bolted joints: Experimental and numerical analysis",
pages = "89-77",
volume = "33",
doi = "10.1016/j.istruc.2021.04.016"
}

Gašić, V., Arsić, A.,& Zrnić, N.. (2021). Strength of extended stiffened end-plate bolted joints: Experimental and numerical analysis. in Structures
Elsevier Science Inc, New York., 33, 77-89.
https://doi.org/10.1016/j.istruc.2021.04.016

Gašić V, Arsić A, Zrnić N. Strength of extended stiffened end-plate bolted joints: Experimental and numerical analysis. in Structures. 2021;33:77-89.
doi:10.1016/j.istruc.2021.04.016 .

Gašić, Vlada, Arsić, Aleksandra, Zrnić, Nenad, "Strength of extended stiffened end-plate bolted joints: Experimental and numerical analysis" in Structures, 33 (2021):77-89,
https://doi.org/10.1016/j.istruc.2021.04.016 . .

TY  - CONF
AU  - Arsić, Aleksandra
AU  - Gašić, Vlada
AU  - Zrnić, Nenad
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4374
AB  - The end-plate bolted connections are widely used in the construction of metal buildings and steel portal frames and play a crucial role in the safety of steel structures. Studies agreed that joint rotational behavior should be considered in frame analysis due to the fact that majority of these joints are semi-rigid. This paper gives a survey on the progress in this topic, based on the studies in the last decade and main design approaches which are analytical, numerical and experimental. There are noted some principal characteristics of each method, along with some advantages and disadvantages. The illustrative example is given to describe the situation when all the mentioned methods are included on the single joint. It is proposed, as a good practice, to propose analytical model in that way to comply with experimental verification and to use numerical model in the form of validation in the last stages of joint design. Finally, it is noted that joint behavior under monotonic or cyclic loading, within the scope of the ductile failure modes of the joint, can be controlled with the design parameters of the end-plate and bolts.
PB  - Beograd : Institut za istraživanja i projektovanja u privredi
C3  - Proceedings of YOUng ResearcherS Conference 2020
T1  - Some aspects on the design approaches for bolted moment connections in frames
EP  - 104
SP  - 98
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4374
ER  - 

@conference{
author = "Arsić, Aleksandra and Gašić, Vlada and Zrnić, Nenad",
year = "2020",
abstract = "The end-plate bolted connections are widely used in the construction of metal buildings and steel portal frames and play a crucial role in the safety of steel structures. Studies agreed that joint rotational behavior should be considered in frame analysis due to the fact that majority of these joints are semi-rigid. This paper gives a survey on the progress in this topic, based on the studies in the last decade and main design approaches which are analytical, numerical and experimental. There are noted some principal characteristics of each method, along with some advantages and disadvantages. The illustrative example is given to describe the situation when all the mentioned methods are included on the single joint. It is proposed, as a good practice, to propose analytical model in that way to comply with experimental verification and to use numerical model in the form of validation in the last stages of joint design. Finally, it is noted that joint behavior under monotonic or cyclic loading, within the scope of the ductile failure modes of the joint, can be controlled with the design parameters of the end-plate and bolts.",
publisher = "Beograd : Institut za istraživanja i projektovanja u privredi",
journal = "Proceedings of YOUng ResearcherS Conference 2020",
title = "Some aspects on the design approaches for bolted moment connections in frames",
pages = "104-98",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4374"
}

Arsić, A., Gašić, V.,& Zrnić, N.. (2020). Some aspects on the design approaches for bolted moment connections in frames. in Proceedings of YOUng ResearcherS Conference 2020
Beograd : Institut za istraživanja i projektovanja u privredi., 98-104.
https://hdl.handle.net/21.15107/rcub_machinery_4374

Arsić A, Gašić V, Zrnić N. Some aspects on the design approaches for bolted moment connections in frames. in Proceedings of YOUng ResearcherS Conference 2020. 2020;:98-104.
https://hdl.handle.net/21.15107/rcub_machinery_4374 .

Arsić, Aleksandra, Gašić, Vlada, Zrnić, Nenad, "Some aspects on the design approaches for bolted moment connections in frames" in Proceedings of YOUng ResearcherS Conference 2020 (2020):98-104,
https://hdl.handle.net/21.15107/rcub_machinery_4374 .

TY  - CONF
AU  - Gašić, Vlada
AU  - Milenović, Ivan Lj.
AU  - Jovanović, Miloš
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4539
AB  - The paper deals with the structural optimization of the cantilever girder. Standard CAD
optimization tool is used for the model of the main girder on a large jib crane. The objective
function is the minimum weight of the girder subjected to the given payload, while constraint
functions are postulated according to the usual structural rules and regulations. The illustrative
example shows an easy way of optimization which can be used in everyday CAD designing practice.
It gives practical recommendations in the selection of variable parameters. The obtained results
indicate that the algorithm is time-saving when compared to the analytical approach, especially
when variability of the section needs to be included in the design.
PB  - Serbian Society for Geometry and Graphics (SUGIG)
PB  - University of Belgrade: Faculty of Mechanical Engineering
C3  - The 7th International Scientific Conference on Geometry and Graphics - moNGeomatrija2020, September 18th – 21st 2020, Belgrade, Serbia
T1  - CAD Structural Optimization of Large Cantilever Girders on Cranes
EP  - 320
SP  - 315
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4539
ER  - 

@conference{
author = "Gašić, Vlada and Milenović, Ivan Lj. and Jovanović, Miloš",
year = "2020",
abstract = "The paper deals with the structural optimization of the cantilever girder. Standard CAD
optimization tool is used for the model of the main girder on a large jib crane. The objective
function is the minimum weight of the girder subjected to the given payload, while constraint
functions are postulated according to the usual structural rules and regulations. The illustrative
example shows an easy way of optimization which can be used in everyday CAD designing practice.
It gives practical recommendations in the selection of variable parameters. The obtained results
indicate that the algorithm is time-saving when compared to the analytical approach, especially
when variability of the section needs to be included in the design.",
publisher = "Serbian Society for Geometry and Graphics (SUGIG), University of Belgrade: Faculty of Mechanical Engineering",
journal = "The 7th International Scientific Conference on Geometry and Graphics - moNGeomatrija2020, September 18th – 21st 2020, Belgrade, Serbia",
title = "CAD Structural Optimization of Large Cantilever Girders on Cranes",
pages = "320-315",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4539"
}

Gašić, V., Milenović, I. Lj.,& Jovanović, M.. (2020). CAD Structural Optimization of Large Cantilever Girders on Cranes. in The 7th International Scientific Conference on Geometry and Graphics - moNGeomatrija2020, September 18th – 21st 2020, Belgrade, Serbia
Serbian Society for Geometry and Graphics (SUGIG)., 315-320.
https://hdl.handle.net/21.15107/rcub_machinery_4539

Gašić V, Milenović IL, Jovanović M. CAD Structural Optimization of Large Cantilever Girders on Cranes. in The 7th International Scientific Conference on Geometry and Graphics - moNGeomatrija2020, September 18th – 21st 2020, Belgrade, Serbia. 2020;:315-320.
https://hdl.handle.net/21.15107/rcub_machinery_4539 .

Gašić, Vlada, Milenović, Ivan Lj., Jovanović, Miloš, "CAD Structural Optimization of Large Cantilever Girders on Cranes" in The 7th International Scientific Conference on Geometry and Graphics - moNGeomatrija2020, September 18th – 21st 2020, Belgrade, Serbia (2020):315-320,
https://hdl.handle.net/21.15107/rcub_machinery_4539 .

TY  - CONF
AU  - Gašić, Vlada
AU  - Košanin, Nikola
AU  - Olszyna, Grzegorz
AU  - Arsić, Aleksandra
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4372
AB  - This paper deals with the local bending stresses at the steel runway beams
made of HEA sections. Some aspects of this structural problem are
considered here, with usage of finite element analysis (FEA). There are
presented three different models and several load cases to obtain the
values of local bending stresses which enable the comparison with the
results from adopted EN regulative. Specially, it is considered the possible
superposition of stresses for adjacent wheel loads. This is done due to
restriction in regulative which deals with the geometry of trolley vs. beam
width. It is confirmed some inconsistencies in current regulative, along
with the occurrence of affected zone in section with possible higher values
of stresses near the web. Without consideration of volume, it is noted that
distance of adjacent wheels has influence on the level of local stresses.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of XXIII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2019
T1  - FEA Aspects of the Local Bending stresses at the HEA-section Runway Beams
EP  - 186
SP  - 183
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4372
ER  - 

@conference{
author = "Gašić, Vlada and Košanin, Nikola and Olszyna, Grzegorz and Arsić, Aleksandra",
year = "2019",
abstract = "This paper deals with the local bending stresses at the steel runway beams
made of HEA sections. Some aspects of this structural problem are
considered here, with usage of finite element analysis (FEA). There are
presented three different models and several load cases to obtain the
values of local bending stresses which enable the comparison with the
results from adopted EN regulative. Specially, it is considered the possible
superposition of stresses for adjacent wheel loads. This is done due to
restriction in regulative which deals with the geometry of trolley vs. beam
width. It is confirmed some inconsistencies in current regulative, along
with the occurrence of affected zone in section with possible higher values
of stresses near the web. Without consideration of volume, it is noted that
distance of adjacent wheels has influence on the level of local stresses.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of XXIII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2019",
title = "FEA Aspects of the Local Bending stresses at the HEA-section Runway Beams",
pages = "186-183",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4372"
}

Gašić, V., Košanin, N., Olszyna, G.,& Arsić, A.. (2019). FEA Aspects of the Local Bending stresses at the HEA-section Runway Beams. in Proceedings of XXIII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2019
University of Belgrade, Faculty of Mechanical Engineering., 183-186.
https://hdl.handle.net/21.15107/rcub_machinery_4372

Gašić V, Košanin N, Olszyna G, Arsić A. FEA Aspects of the Local Bending stresses at the HEA-section Runway Beams. in Proceedings of XXIII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2019. 2019;:183-186.
https://hdl.handle.net/21.15107/rcub_machinery_4372 .

Gašić, Vlada, Košanin, Nikola, Olszyna, Grzegorz, Arsić, Aleksandra, "FEA Aspects of the Local Bending stresses at the HEA-section Runway Beams" in Proceedings of XXIII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2019 (2019):183-186,
https://hdl.handle.net/21.15107/rcub_machinery_4372 .

TY  - CONF
AU  - Gašić, Vlada
AU  - Arsić, Aleksandra
AU  - Pantelić, Milorad
AU  - Kočović, Dejan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4368
AB  - The paper deals with numerical study on the stresses at the bolted end-plate moment connection, with application of finite element analysis. The prying effects in the joint are considered for the comparative analysis with analytical model of bolt calculation. There are observed three basic models of the joint which reflect variation of the joint stiffness, along with the cases of different parameters of end-plate thickness. It is shown that several parameters have effects on the stresses at the joint and need to be considered in the structural analysis of the frame structures. Also, there are given some recommendations for practical usage for the design of this kind of joints.
PB  - University of Banja Luka : Faculty of Mechanical Engineering
C3  - Proceedings of the 14th International Conference of the Accomplishments in Mechanical and Industrial Engineering
T1  - Consideration of structural elements characteristics on the stresses at the I-beam end-plate moment connection
EP  - 396
SP  - 391
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4368
ER  - 

@conference{
author = "Gašić, Vlada and Arsić, Aleksandra and Pantelić, Milorad and Kočović, Dejan",
year = "2019",
abstract = "The paper deals with numerical study on the stresses at the bolted end-plate moment connection, with application of finite element analysis. The prying effects in the joint are considered for the comparative analysis with analytical model of bolt calculation. There are observed three basic models of the joint which reflect variation of the joint stiffness, along with the cases of different parameters of end-plate thickness. It is shown that several parameters have effects on the stresses at the joint and need to be considered in the structural analysis of the frame structures. Also, there are given some recommendations for practical usage for the design of this kind of joints.",
publisher = "University of Banja Luka : Faculty of Mechanical Engineering",
journal = "Proceedings of the 14th International Conference of the Accomplishments in Mechanical and Industrial Engineering",
title = "Consideration of structural elements characteristics on the stresses at the I-beam end-plate moment connection",
pages = "396-391",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4368"
}

Gašić, V., Arsić, A., Pantelić, M.,& Kočović, D.. (2019). Consideration of structural elements characteristics on the stresses at the I-beam end-plate moment connection. in Proceedings of the 14th International Conference of the Accomplishments in Mechanical and Industrial Engineering
University of Banja Luka : Faculty of Mechanical Engineering., 391-396.
https://hdl.handle.net/21.15107/rcub_machinery_4368

Gašić V, Arsić A, Pantelić M, Kočović D. Consideration of structural elements characteristics on the stresses at the I-beam end-plate moment connection. in Proceedings of the 14th International Conference of the Accomplishments in Mechanical and Industrial Engineering. 2019;:391-396.
https://hdl.handle.net/21.15107/rcub_machinery_4368 .

Gašić, Vlada, Arsić, Aleksandra, Pantelić, Milorad, Kočović, Dejan, "Consideration of structural elements characteristics on the stresses at the I-beam end-plate moment connection" in Proceedings of the 14th International Conference of the Accomplishments in Mechanical and Industrial Engineering (2019):391-396,
https://hdl.handle.net/21.15107/rcub_machinery_4368 .

TY  - JOUR
AU  - Gašić, Vlada
AU  - Arsić, Aleksandra
AU  - Flajs, Željko
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3167
AB  - The paper deals with experimental study of the stresses at the bolted end-plate moment connection. The design parameters are adopted to include prying effects in joint. A stress level is obtained in the elements where the highest values occur in the tension zone of the end-plate. The accompanied finite element analysis is performed for comparing purposes with experimental results. It is shown that end-plate thickness should be the unavoidable joint parameter in structural analysis of frame-like structures.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Experimental study on the stresses at the i-beam end-plate moment connection
EP  - 57
IS  - 1
SP  - 53
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_3167
ER  - 

@article{
author = "Gašić, Vlada and Arsić, Aleksandra and Flajs, Željko",
year = "2019",
abstract = "The paper deals with experimental study of the stresses at the bolted end-plate moment connection. The design parameters are adopted to include prying effects in joint. A stress level is obtained in the elements where the highest values occur in the tension zone of the end-plate. The accompanied finite element analysis is performed for comparing purposes with experimental results. It is shown that end-plate thickness should be the unavoidable joint parameter in structural analysis of frame-like structures.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Experimental study on the stresses at the i-beam end-plate moment connection",
pages = "57-53",
number = "1",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_3167"
}

Gašić, V., Arsić, A.,& Flajs, Ž.. (2019). Experimental study on the stresses at the i-beam end-plate moment connection. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 19(1), 53-57.
https://hdl.handle.net/21.15107/rcub_machinery_3167

Gašić V, Arsić A, Flajs Ž. Experimental study on the stresses at the i-beam end-plate moment connection. in Structural Integrity and Life. 2019;19(1):53-57.
https://hdl.handle.net/21.15107/rcub_machinery_3167 .

Gašić, Vlada, Arsić, Aleksandra, Flajs, Željko, "Experimental study on the stresses at the i-beam end-plate moment connection" in Structural Integrity and Life, 19, no. 1 (2019):53-57,
https://hdl.handle.net/21.15107/rcub_machinery_3167 .

TY  - JOUR
AU  - Gašić, Vlada
AU  - Ćoćić, Aleksandar
AU  - Anđelić, Nina
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2817
AB  - U ovom radu se analizira uticaj horizontalnih inercijalnih sila na konzolne nosače sa promenljivim poprečnim presekom oblika I-profila. Razmatra se varijacija preseka koja uključuje promenu visine preseka, kao najpraktičnije varijante pri projektovanju nosača dizalica. Zbog složenosti postavljenog problema koji uključuje problem ograničenog uvijanja, statički odzivi su dobijeni numeričkim metodama. Modeli nosača su usvojeni prema poznatim konstrukcionom preporukama za varijaciju nosača, sa ciljem praktične primene kod konstrukcija konzolnih dizalica. Poređenje rezultata je izvršeno sa poznatim vrednostima efekata uvojnog savijanja kod nosača uniformnog poprečnog preseka. Sa aspekta postavljenog problema i izabranih modela nosača, prikazane su prednosti korišćenja nosača sa promenljivim poprečnim presekom.
AB  - The problem of torsion due to horizontal inertial effects is considered at cantilever beam with variable I-section. Linear variation of height is concerned as most practical one for the design of cantilever beams. The solution for adopted cases of beams is obtained numerically, according to the complexity of the given ordinary differential equation which deals with pure torsion along with warping torsion. The models are based on known tailor-made beams with possibility for application in design of jib cranes, as practical aspect of this work. The comparison of results is done with uniform cantilever beam models which can be used as one way for verification of stress state of variable cantilever beams subjected to bending with torsion. The obtained results show corresponding advantages of usage of variable sections.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Uticaj horizontalnih inercijalnih sila kod konzolnih nosača sa promenljivim poprečnim presekom
T1  - Consideration of the horizontal inertial effects at cantilever beams with nonuniform open sections
EP  - 346
IS  - 3
SP  - 342
VL  - 46
DO  - 10.5937/fmet1803342G
ER  - 

@article{
author = "Gašić, Vlada and Ćoćić, Aleksandar and Anđelić, Nina",
year = "2018",
abstract = "U ovom radu se analizira uticaj horizontalnih inercijalnih sila na konzolne nosače sa promenljivim poprečnim presekom oblika I-profila. Razmatra se varijacija preseka koja uključuje promenu visine preseka, kao najpraktičnije varijante pri projektovanju nosača dizalica. Zbog složenosti postavljenog problema koji uključuje problem ograničenog uvijanja, statički odzivi su dobijeni numeričkim metodama. Modeli nosača su usvojeni prema poznatim konstrukcionom preporukama za varijaciju nosača, sa ciljem praktične primene kod konstrukcija konzolnih dizalica. Poređenje rezultata je izvršeno sa poznatim vrednostima efekata uvojnog savijanja kod nosača uniformnog poprečnog preseka. Sa aspekta postavljenog problema i izabranih modela nosača, prikazane su prednosti korišćenja nosača sa promenljivim poprečnim presekom., The problem of torsion due to horizontal inertial effects is considered at cantilever beam with variable I-section. Linear variation of height is concerned as most practical one for the design of cantilever beams. The solution for adopted cases of beams is obtained numerically, according to the complexity of the given ordinary differential equation which deals with pure torsion along with warping torsion. The models are based on known tailor-made beams with possibility for application in design of jib cranes, as practical aspect of this work. The comparison of results is done with uniform cantilever beam models which can be used as one way for verification of stress state of variable cantilever beams subjected to bending with torsion. The obtained results show corresponding advantages of usage of variable sections.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Uticaj horizontalnih inercijalnih sila kod konzolnih nosača sa promenljivim poprečnim presekom, Consideration of the horizontal inertial effects at cantilever beams with nonuniform open sections",
pages = "346-342",
number = "3",
volume = "46",
doi = "10.5937/fmet1803342G"
}

Gašić, V., Ćoćić, A.,& Anđelić, N.. (2018). Uticaj horizontalnih inercijalnih sila kod konzolnih nosača sa promenljivim poprečnim presekom. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 46(3), 342-346.
https://doi.org/10.5937/fmet1803342G

Gašić V, Ćoćić A, Anđelić N. Uticaj horizontalnih inercijalnih sila kod konzolnih nosača sa promenljivim poprečnim presekom. in FME Transactions. 2018;46(3):342-346.
doi:10.5937/fmet1803342G .

Gašić, Vlada, Ćoćić, Aleksandar, Anđelić, Nina, "Uticaj horizontalnih inercijalnih sila kod konzolnih nosača sa promenljivim poprečnim presekom" in FME Transactions, 46, no. 3 (2018):342-346,
https://doi.org/10.5937/fmet1803342G . .

TY  - CONF
AU  - Gašić, Vlada
AU  - Ćoćić, Aleksandar
AU  - Anđelić, Nina
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4573
AB  - The problem of torsion of the I-section beam is considered in this work,
with emphasis on the variable cross section of the beam. Linear variation
of height is concerned as most practical one for the design of cantilever
beams. The solution for adopted cases of beams is obtained numerically,
according to the given ordinary differential equation which deals with pure
torsion along with warping torsion. The models are based on practical
tailore-made beams. The comparison of results is done with uniform
cantilever beam models which can be used as one view for stress check of
cantilever beams subjected to bending with torsion.
PB  - University of Belgrade: Faculty of Mechanical Engineering
C3  - Proceedings of XXII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2017
T1  - Warping torsion of non-uniform thin-walled open section at cantilever beams
EP  - 244
SP  - 241
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4573
ER  - 

@conference{
author = "Gašić, Vlada and Ćoćić, Aleksandar and Anđelić, Nina",
year = "2017",
abstract = "The problem of torsion of the I-section beam is considered in this work,
with emphasis on the variable cross section of the beam. Linear variation
of height is concerned as most practical one for the design of cantilever
beams. The solution for adopted cases of beams is obtained numerically,
according to the given ordinary differential equation which deals with pure
torsion along with warping torsion. The models are based on practical
tailore-made beams. The comparison of results is done with uniform
cantilever beam models which can be used as one view for stress check of
cantilever beams subjected to bending with torsion.",
publisher = "University of Belgrade: Faculty of Mechanical Engineering",
journal = "Proceedings of XXII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2017",
title = "Warping torsion of non-uniform thin-walled open section at cantilever beams",
pages = "244-241",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4573"
}

Gašić, V., Ćoćić, A.,& Anđelić, N.. (2017). Warping torsion of non-uniform thin-walled open section at cantilever beams. in Proceedings of XXII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2017
University of Belgrade: Faculty of Mechanical Engineering., 241-244.
https://hdl.handle.net/21.15107/rcub_machinery_4573

Gašić V, Ćoćić A, Anđelić N. Warping torsion of non-uniform thin-walled open section at cantilever beams. in Proceedings of XXII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2017. 2017;:241-244.
https://hdl.handle.net/21.15107/rcub_machinery_4573 .

Gašić, Vlada, Ćoćić, Aleksandar, Anđelić, Nina, "Warping torsion of non-uniform thin-walled open section at cantilever beams" in Proceedings of XXII International Conference on "Material Handling, Constructions and Logistics" - MHCL 2017 (2017):241-244,
https://hdl.handle.net/21.15107/rcub_machinery_4573 .

TY  - CONF
AU  - Vencl, Aleksandar
AU  - Gašić, Vlada
AU  - Stojanović, Blaža
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2556
AB  - Wear as a tribological process has a major influence on the reliability and life of rolling bearings. Field examinations of bearing failures due to wear indicate possible causes and point to the necessary measurements for wear reduction or elimination. Wear itself is a very complex process initiated by the action of different mechanisms, and can be manifested by different wear types which are often related. However, the dominant type of wear can be approximately determined. The paper presents the classification of most common bearing damages according to the dominant wear type, i.e. abrasive wear, adhesive wear, surface fatigue wear, erosive wear, fretting wear and corrosive wear. The wear types are correlated with the terms used in ISO 15243 standard. Each wear type is illustrated with an appropriate photograph, and for each wear type, appropriate description of causes and manifestations is presented. Possible causes of rolling bearing failure are used for the fault tree analysis (FTA). It was performed to determine the root causes for bearing failures. The constructed fault tree diagram for rolling bearing failure can be useful tool for maintenance engineers.
PB  - IOP Publishing Ltd, Bristol
C3  - 13th International Conference on Tribology (Rotrib'16)
T1  - Fault tree analysis of most common rolling bearing tribological failures
VL  - 174
DO  - 10.1088/1757-899X/174/1/012048
ER  - 

@conference{
author = "Vencl, Aleksandar and Gašić, Vlada and Stojanović, Blaža",
year = "2017",
abstract = "Wear as a tribological process has a major influence on the reliability and life of rolling bearings. Field examinations of bearing failures due to wear indicate possible causes and point to the necessary measurements for wear reduction or elimination. Wear itself is a very complex process initiated by the action of different mechanisms, and can be manifested by different wear types which are often related. However, the dominant type of wear can be approximately determined. The paper presents the classification of most common bearing damages according to the dominant wear type, i.e. abrasive wear, adhesive wear, surface fatigue wear, erosive wear, fretting wear and corrosive wear. The wear types are correlated with the terms used in ISO 15243 standard. Each wear type is illustrated with an appropriate photograph, and for each wear type, appropriate description of causes and manifestations is presented. Possible causes of rolling bearing failure are used for the fault tree analysis (FTA). It was performed to determine the root causes for bearing failures. The constructed fault tree diagram for rolling bearing failure can be useful tool for maintenance engineers.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "13th International Conference on Tribology (Rotrib'16)",
title = "Fault tree analysis of most common rolling bearing tribological failures",
volume = "174",
doi = "10.1088/1757-899X/174/1/012048"
}

Vencl, A., Gašić, V.,& Stojanović, B.. (2017). Fault tree analysis of most common rolling bearing tribological failures. in 13th International Conference on Tribology (Rotrib'16)
IOP Publishing Ltd, Bristol., 174.
https://doi.org/10.1088/1757-899X/174/1/012048

Vencl A, Gašić V, Stojanović B. Fault tree analysis of most common rolling bearing tribological failures. in 13th International Conference on Tribology (Rotrib'16). 2017;174.
doi:10.1088/1757-899X/174/1/012048 .

Vencl, Aleksandar, Gašić, Vlada, Stojanović, Blaža, "Fault tree analysis of most common rolling bearing tribological failures" in 13th International Conference on Tribology (Rotrib'16), 174 (2017),
https://doi.org/10.1088/1757-899X/174/1/012048 . .

TY  - JOUR
AU  - Arsić, Miodrag
AU  - Savić, Zoran
AU  - Bošnjak, Srđan
AU  - Gašić, Vlada
AU  - Arsić, Dušan
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5260
AB  - Excavation, transport and spreading of barren soil and crude ore are being performed by a number of machines during the continuous production process at excavation sites, such as: bucket-wheel excava-tor; conveyor and spreader (so called ECS system). Failure of any machine in the technological chain leads to the failure of the whole system, and therefore it should be considered a structure with a serial connection. In this paper the results of non-destructive tests performed at welded joints and parent material (vi-sual testing, penetrant testing, ultrasonic testing, radiographic testing, hardness testing) on the basis of which the state analysis of components of the damaged structure, integrity evaluation of braces of the cutting and discharge boom and homogeneity of welded joints of newly _formed structures of the spreader A2Rs B 5500.55 + BRs at the excavation site 'Drnmo' near Kostolac, Serbia were perfor-med, are presented. Taking into account the fact that the user of the spreader does not own the design and technical documentation, all tests and researches presented in this paper were performed under the assumption that the lattice structures of both cutting and discharge boom were made of structural steels £955 and 5235, in accordance with standard EAT 10027-1.
PB  - Savez energetičara
T2  - Energija (Energija, ekonomija, ekologija)
T1  - State analysis of components of the damaged structure and integrity evaluation of braces at the spreader A2Rs – B 5500.55 + BRs
EP  - 261
IS  - 1-2
SP  - 257
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5260
ER  - 

@article{
author = "Arsić, Miodrag and Savić, Zoran and Bošnjak, Srđan and Gašić, Vlada and Arsić, Dušan",
year = "2016",
abstract = "Excavation, transport and spreading of barren soil and crude ore are being performed by a number of machines during the continuous production process at excavation sites, such as: bucket-wheel excava-tor; conveyor and spreader (so called ECS system). Failure of any machine in the technological chain leads to the failure of the whole system, and therefore it should be considered a structure with a serial connection. In this paper the results of non-destructive tests performed at welded joints and parent material (vi-sual testing, penetrant testing, ultrasonic testing, radiographic testing, hardness testing) on the basis of which the state analysis of components of the damaged structure, integrity evaluation of braces of the cutting and discharge boom and homogeneity of welded joints of newly _formed structures of the spreader A2Rs B 5500.55 + BRs at the excavation site 'Drnmo' near Kostolac, Serbia were perfor-med, are presented. Taking into account the fact that the user of the spreader does not own the design and technical documentation, all tests and researches presented in this paper were performed under the assumption that the lattice structures of both cutting and discharge boom were made of structural steels £955 and 5235, in accordance with standard EAT 10027-1.",
publisher = "Savez energetičara",
journal = "Energija (Energija, ekonomija, ekologija)",
title = "State analysis of components of the damaged structure and integrity evaluation of braces at the spreader A2Rs – B 5500.55 + BRs",
pages = "261-257",
number = "1-2",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5260"
}

Arsić, M., Savić, Z., Bošnjak, S., Gašić, V.,& Arsić, D.. (2016). State analysis of components of the damaged structure and integrity evaluation of braces at the spreader A2Rs – B 5500.55 + BRs. in Energija (Energija, ekonomija, ekologija)
Savez energetičara., 18(1-2), 257-261.
https://hdl.handle.net/21.15107/rcub_machinery_5260

Arsić M, Savić Z, Bošnjak S, Gašić V, Arsić D. State analysis of components of the damaged structure and integrity evaluation of braces at the spreader A2Rs – B 5500.55 + BRs. in Energija (Energija, ekonomija, ekologija). 2016;18(1-2):257-261.
https://hdl.handle.net/21.15107/rcub_machinery_5260 .

Arsić, Miodrag, Savić, Zoran, Bošnjak, Srđan, Gašić, Vlada, Arsić, Dušan, "State analysis of components of the damaged structure and integrity evaluation of braces at the spreader A2Rs – B 5500.55 + BRs" in Energija (Energija, ekonomija, ekologija), 18, no. 1-2 (2016):257-261,
https://hdl.handle.net/21.15107/rcub_machinery_5260 .

TY  - JOUR
AU  - Bošnjak, Srđan
AU  - Gnjatović, Nebojša
AU  - Momčilović, Dejan B.
AU  - Milenović, Ivan Lj.
AU  - Gašić, Vlada
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2146
AB  - This paper presents an investigation of the accident which occurred during startup of the extending structure from the transport position. In order to clarify the causes of crack occurrence along almost the entire surface of the lever cross-section, the authors performed visual, experimental (chemical composition, tensile properties, microhardness) as well as metallographic examinations. Stress states in the critical zone are defined by applying the finite element method (FEM). Based on the investigation results it was concluded that the lever breakdown is predominantly caused by both the 'operating-in' defect (the malfunction of the limit switch) and the 'manufacturing-in' defect (poor weld quality). The investigation results presented in this paper are important because same or similar problems could arise in supporting structures of various types of transportation, construction and mining machines.
PB  - Elsevier Ltd
T2  - Case Studies in Engineering Failure Analysis
T1  - Failure analysis of the mobile elevating work platform
EP  - 87
SP  - 80
VL  - 3
DO  - 10.1016/j.csefa.2015.03.005
ER  - 

@article{
author = "Bošnjak, Srđan and Gnjatović, Nebojša and Momčilović, Dejan B. and Milenović, Ivan Lj. and Gašić, Vlada",
year = "2015",
abstract = "This paper presents an investigation of the accident which occurred during startup of the extending structure from the transport position. In order to clarify the causes of crack occurrence along almost the entire surface of the lever cross-section, the authors performed visual, experimental (chemical composition, tensile properties, microhardness) as well as metallographic examinations. Stress states in the critical zone are defined by applying the finite element method (FEM). Based on the investigation results it was concluded that the lever breakdown is predominantly caused by both the 'operating-in' defect (the malfunction of the limit switch) and the 'manufacturing-in' defect (poor weld quality). The investigation results presented in this paper are important because same or similar problems could arise in supporting structures of various types of transportation, construction and mining machines.",
publisher = "Elsevier Ltd",
journal = "Case Studies in Engineering Failure Analysis",
title = "Failure analysis of the mobile elevating work platform",
pages = "87-80",
volume = "3",
doi = "10.1016/j.csefa.2015.03.005"
}

Bošnjak, S., Gnjatović, N., Momčilović, D. B., Milenović, I. Lj.,& Gašić, V.. (2015). Failure analysis of the mobile elevating work platform. in Case Studies in Engineering Failure Analysis
Elsevier Ltd., 3, 80-87.
https://doi.org/10.1016/j.csefa.2015.03.005

Bošnjak S, Gnjatović N, Momčilović DB, Milenović IL, Gašić V. Failure analysis of the mobile elevating work platform. in Case Studies in Engineering Failure Analysis. 2015;3:80-87.
doi:10.1016/j.csefa.2015.03.005 .

Bošnjak, Srđan, Gnjatović, Nebojša, Momčilović, Dejan B., Milenović, Ivan Lj., Gašić, Vlada, "Failure analysis of the mobile elevating work platform" in Case Studies in Engineering Failure Analysis, 3 (2015):80-87,
https://doi.org/10.1016/j.csefa.2015.03.005 . .

TY  - CONF
AU  - Gašić, Vlada
AU  - Zrnić, Nenad
AU  - Milojević, Goran
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4518
AB  - The capacity curves for specified I-section beams are determined in this
work, in order to represent guidance for designers of material handling
equipment. Safety requirements for beams are implemented in given
algorithm. Specially, the beam model of monorail crane concerns the
stress, deflection and lateral buckling proof as main considerations in
design of such systems. There are given capacity curves for various I-sections
with respect to desired span of runway which enables fast and
easy adoption of structural elements. Also, they can be used for capacity
estimation of the single girder bridge cranes and other beamlike
structures.
PB  - University of Belgrade: Faculty of Mechanical Engineering
C3  - Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015
T1  - Loading Capacity Curves for Design of I-Section Runway Beams
EP  - 116
SP  - 113
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4518
ER  - 

@conference{
author = "Gašić, Vlada and Zrnić, Nenad and Milojević, Goran",
year = "2015",
abstract = "The capacity curves for specified I-section beams are determined in this
work, in order to represent guidance for designers of material handling
equipment. Safety requirements for beams are implemented in given
algorithm. Specially, the beam model of monorail crane concerns the
stress, deflection and lateral buckling proof as main considerations in
design of such systems. There are given capacity curves for various I-sections
with respect to desired span of runway which enables fast and
easy adoption of structural elements. Also, they can be used for capacity
estimation of the single girder bridge cranes and other beamlike
structures.",
publisher = "University of Belgrade: Faculty of Mechanical Engineering",
journal = "Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015",
title = "Loading Capacity Curves for Design of I-Section Runway Beams",
pages = "116-113",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4518"
}

Gašić, V., Zrnić, N.,& Milojević, G.. (2015). Loading Capacity Curves for Design of I-Section Runway Beams. in Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015
University of Belgrade: Faculty of Mechanical Engineering., 113-116.
https://hdl.handle.net/21.15107/rcub_machinery_4518

Gašić V, Zrnić N, Milojević G. Loading Capacity Curves for Design of I-Section Runway Beams. in Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015. 2015;:113-116.
https://hdl.handle.net/21.15107/rcub_machinery_4518 .

Gašić, Vlada, Zrnić, Nenad, Milojević, Goran, "Loading Capacity Curves for Design of I-Section Runway Beams" in Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015 (2015):113-116,
https://hdl.handle.net/21.15107/rcub_machinery_4518 .

TY  - JOUR
AU  - Zrnić, Nenad
AU  - Gašić, Vlada
AU  - Bošnjak, Srđan
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2098
AB  - This paper discusses a combined finite element and analytical method for obtaining transverse and longitudinal vibrations of a gantry crane system subjected to an elastically suspended moving body. The two-dimensional inertial effects of the moving body are included in derivation of differential equation of motion for the system. Factors as speed, acceleration and suspension characteristics of a moving body are studied, including the influence of structural damping. The obtained results validate the presented approach and can be used in the design process of gantry cranes.
PB  - Elsevier Urban & Partner Sp Z O O, Wroclaw
T2  - Archives of Civil and Mechanical Engineering
T1  - Dynamic responses of a gantry crane system due to a moving body considered as moving oscillator
EP  - 250
IS  - 1
SP  - 243
VL  - 15
DO  - 10.1016/j.acme.2014.02.002
ER  - 

@article{
author = "Zrnić, Nenad and Gašić, Vlada and Bošnjak, Srđan",
year = "2015",
abstract = "This paper discusses a combined finite element and analytical method for obtaining transverse and longitudinal vibrations of a gantry crane system subjected to an elastically suspended moving body. The two-dimensional inertial effects of the moving body are included in derivation of differential equation of motion for the system. Factors as speed, acceleration and suspension characteristics of a moving body are studied, including the influence of structural damping. The obtained results validate the presented approach and can be used in the design process of gantry cranes.",
publisher = "Elsevier Urban & Partner Sp Z O O, Wroclaw",
journal = "Archives of Civil and Mechanical Engineering",
title = "Dynamic responses of a gantry crane system due to a moving body considered as moving oscillator",
pages = "250-243",
number = "1",
volume = "15",
doi = "10.1016/j.acme.2014.02.002"
}

Zrnić, N., Gašić, V.,& Bošnjak, S.. (2015). Dynamic responses of a gantry crane system due to a moving body considered as moving oscillator. in Archives of Civil and Mechanical Engineering
Elsevier Urban & Partner Sp Z O O, Wroclaw., 15(1), 243-250.
https://doi.org/10.1016/j.acme.2014.02.002

Zrnić N, Gašić V, Bošnjak S. Dynamic responses of a gantry crane system due to a moving body considered as moving oscillator. in Archives of Civil and Mechanical Engineering. 2015;15(1):243-250.
doi:10.1016/j.acme.2014.02.002 .

Zrnić, Nenad, Gašić, Vlada, Bošnjak, Srđan, "Dynamic responses of a gantry crane system due to a moving body considered as moving oscillator" in Archives of Civil and Mechanical Engineering, 15, no. 1 (2015):243-250,
https://doi.org/10.1016/j.acme.2014.02.002 . .

TY  - CONF
AU  - Jerman, Boris
AU  - Hladnik, Jurij
AU  - Gašić, Vlada
AU  - Đorđević, Miloš
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4522
AB  - Truck mounted hydraulic cranes are widely used in the timber and in the waste disposal industry. They have a specific design, where dead weight, size in the folded position and the position of the gripper in the folded position are of particularly importance. Functionality of the crane is therefore expressed with load handling capabilities and also with the functionality during road transportation of the payload, when the crane is in the folded position on the truck. For handling
of heavier loads, nowadays mainly two types of cranes are used - the K cranes and the Z cranes. The main advantage of the K cranes is higher load capacity in comparison with the Z cranes when cranes of approximately the same weight are compared. On the other hand the main advantage of the Z cranes is their capability of folding in position, transvers to truck length. In the paper the kinematics of the mechanisms of the characteristic size K and Z cranes are analysed and mutually compared. The main accent is on the discussion about their load capacity.
PB  - Kraljevo : Faculty of Mechanical and Civil Engineering
C3  - Proceedings of VIII International Conference ”Heavy Machinery - HM 2014”
T1  - Kinematics of the Truck Mounted Hydraulic Cranes
EP  - A150
SP  - A145
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4522
ER  - 

@conference{
author = "Jerman, Boris and Hladnik, Jurij and Gašić, Vlada and Đorđević, Miloš",
year = "2014",
abstract = "Truck mounted hydraulic cranes are widely used in the timber and in the waste disposal industry. They have a specific design, where dead weight, size in the folded position and the position of the gripper in the folded position are of particularly importance. Functionality of the crane is therefore expressed with load handling capabilities and also with the functionality during road transportation of the payload, when the crane is in the folded position on the truck. For handling
of heavier loads, nowadays mainly two types of cranes are used - the K cranes and the Z cranes. The main advantage of the K cranes is higher load capacity in comparison with the Z cranes when cranes of approximately the same weight are compared. On the other hand the main advantage of the Z cranes is their capability of folding in position, transvers to truck length. In the paper the kinematics of the mechanisms of the characteristic size K and Z cranes are analysed and mutually compared. The main accent is on the discussion about their load capacity.",
publisher = "Kraljevo : Faculty of Mechanical and Civil Engineering",
journal = "Proceedings of VIII International Conference ”Heavy Machinery - HM 2014”",
title = "Kinematics of the Truck Mounted Hydraulic Cranes",
pages = "A150-A145",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4522"
}

Jerman, B., Hladnik, J., Gašić, V.,& Đorđević, M.. (2014). Kinematics of the Truck Mounted Hydraulic Cranes. in Proceedings of VIII International Conference ”Heavy Machinery - HM 2014”
Kraljevo : Faculty of Mechanical and Civil Engineering., A145-A150.
https://hdl.handle.net/21.15107/rcub_machinery_4522

Jerman B, Hladnik J, Gašić V, Đorđević M. Kinematics of the Truck Mounted Hydraulic Cranes. in Proceedings of VIII International Conference ”Heavy Machinery - HM 2014”. 2014;:A145-A150.
https://hdl.handle.net/21.15107/rcub_machinery_4522 .

Jerman, Boris, Hladnik, Jurij, Gašić, Vlada, Đorđević, Miloš, "Kinematics of the Truck Mounted Hydraulic Cranes" in Proceedings of VIII International Conference ”Heavy Machinery - HM 2014” (2014):A145-A150,
https://hdl.handle.net/21.15107/rcub_machinery_4522 .

TY  - JOUR
AU  - Gašić, Vlada
AU  - Šalinić, Slaviša
AU  - Obradović, Aleksandar
AU  - Milovančević, Milorad
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1903
AB  - This paper presents a lumped-mass approach for the approximate determination of the dynamic response of a flexible L-shaped structure with tip mass subjected to a moving load. The load in the form of a force of a constant magnitude moving across the top beam of the L-shaped frame with a constant speed is considered. A two degrees of freedom model is formed, which allows to avoid complex analytic postulations and finite element formulations. The incorporation of the moving load influence on the frame structure is achieved through moving force flexibility influence coefficients. By using the assumed-modes method with polynomial shape functions, the validation of the approach is given.
PB  - Elsevier Sci Ltd, Oxford
T2  - Engineering Structures
T1  - Application of the lumped mass technique in dynamic analysis of a flexible L-shaped structure under moving loads
EP  - 392
SP  - 383
VL  - 76
DO  - 10.1016/j.engstruct.2014.07.025
ER  - 

@article{
author = "Gašić, Vlada and Šalinić, Slaviša and Obradović, Aleksandar and Milovančević, Milorad",
year = "2014",
abstract = "This paper presents a lumped-mass approach for the approximate determination of the dynamic response of a flexible L-shaped structure with tip mass subjected to a moving load. The load in the form of a force of a constant magnitude moving across the top beam of the L-shaped frame with a constant speed is considered. A two degrees of freedom model is formed, which allows to avoid complex analytic postulations and finite element formulations. The incorporation of the moving load influence on the frame structure is achieved through moving force flexibility influence coefficients. By using the assumed-modes method with polynomial shape functions, the validation of the approach is given.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Engineering Structures",
title = "Application of the lumped mass technique in dynamic analysis of a flexible L-shaped structure under moving loads",
pages = "392-383",
volume = "76",
doi = "10.1016/j.engstruct.2014.07.025"
}

Gašić, V., Šalinić, S., Obradović, A.,& Milovančević, M.. (2014). Application of the lumped mass technique in dynamic analysis of a flexible L-shaped structure under moving loads. in Engineering Structures
Elsevier Sci Ltd, Oxford., 76, 383-392.
https://doi.org/10.1016/j.engstruct.2014.07.025

Gašić V, Šalinić S, Obradović A, Milovančević M. Application of the lumped mass technique in dynamic analysis of a flexible L-shaped structure under moving loads. in Engineering Structures. 2014;76:383-392.
doi:10.1016/j.engstruct.2014.07.025 .

Gašić, Vlada, Šalinić, Slaviša, Obradović, Aleksandar, Milovančević, Milorad, "Application of the lumped mass technique in dynamic analysis of a flexible L-shaped structure under moving loads" in Engineering Structures, 76 (2014):383-392,
https://doi.org/10.1016/j.engstruct.2014.07.025 . .

TY  - CONF
AU  - Gašić, Vlada
AU  - Obradović, Aleksandar
AU  - Zrnić, Nenad
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4029
AB  - This paper deals with eigenfrequencies of distributed-parameter system within the form of gantry-like structure with
cantilever part. The individual members of the structure-framework are assumed to be governed by the transverse vibration
theory of Euler-Bernoulli beam. It is obtained postulation of frequency equation while solutions are obtained numerically
with in-house software, for several cases of structures. Also, it is done finite element postulation of the gantry-like structure
as discrete-parameter system for analyzing the free undamped vibrations. Thus, it stands for two folded presentation. It is
done verification of postulated algorithms.
PB  - Kraljevo : Faculty of Mechanical and Civil Engineering
C3  - Proceeding of VIII International Conference “Heavy Machinery-HM 2014”, Zlatibor, 25-28 June 2014
T1  - Free Vibrations of the Planar Gantry-like Structures
EP  - A.104
SP  - A.99
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4029
ER  - 

@conference{
author = "Gašić, Vlada and Obradović, Aleksandar and Zrnić, Nenad",
year = "2014",
abstract = "This paper deals with eigenfrequencies of distributed-parameter system within the form of gantry-like structure with
cantilever part. The individual members of the structure-framework are assumed to be governed by the transverse vibration
theory of Euler-Bernoulli beam. It is obtained postulation of frequency equation while solutions are obtained numerically
with in-house software, for several cases of structures. Also, it is done finite element postulation of the gantry-like structure
as discrete-parameter system for analyzing the free undamped vibrations. Thus, it stands for two folded presentation. It is
done verification of postulated algorithms.",
publisher = "Kraljevo : Faculty of Mechanical and Civil Engineering",
journal = "Proceeding of VIII International Conference “Heavy Machinery-HM 2014”, Zlatibor, 25-28 June 2014",
title = "Free Vibrations of the Planar Gantry-like Structures",
pages = "A.104-A.99",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4029"
}

Gašić, V., Obradović, A.,& Zrnić, N.. (2014). Free Vibrations of the Planar Gantry-like Structures. in Proceeding of VIII International Conference “Heavy Machinery-HM 2014”, Zlatibor, 25-28 June 2014
Kraljevo : Faculty of Mechanical and Civil Engineering., A.99-A.104.
https://hdl.handle.net/21.15107/rcub_machinery_4029

Gašić V, Obradović A, Zrnić N. Free Vibrations of the Planar Gantry-like Structures. in Proceeding of VIII International Conference “Heavy Machinery-HM 2014”, Zlatibor, 25-28 June 2014. 2014;:A.99-A.104.
https://hdl.handle.net/21.15107/rcub_machinery_4029 .

Gašić, Vlada, Obradović, Aleksandar, Zrnić, Nenad, "Free Vibrations of the Planar Gantry-like Structures" in Proceeding of VIII International Conference “Heavy Machinery-HM 2014”, Zlatibor, 25-28 June 2014 (2014):A.99-A.104,
https://hdl.handle.net/21.15107/rcub_machinery_4029 .

TY  - THES
AU  - Gašić, Vlada
PY  - 2013
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=476
UR  - https://nardus.mpn.gov.rs/handle/123456789/2300
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:6352/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=514061475
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/15
AB  - U radu se analizira dinamičko ponašanje noseće konstrukcije portalne dizalice usled dejstva kolica kao pokretnog opterećenja. Dat je prikaz klasifikacije portalnih dizalica pri čemu su izdvojene portalne dizalice za kontejnerske terminale sa svojim visokih performansama koje imaju stalnu tendenciju poboljšanja. Prvo je dat koncept primene analitičkog pristupa za modeliranje noseće konstrukcije preko sistema elastičnih tela tipa prizmatične grede i razmatranje slobodnih poprečnih oscilacija. Kao savremen i pre svega neophodan, usvojen je kombinovani pristup za istraživanje naslovnog problema, tj. konačnoelementni pristup je iskorišćen za modeliranje noseće konstrukcije portalne dizalice a principi analitičke mehanike su iskorišćeni za modeliranje kolica. Razmatraju se dva najčešća konstrukciona tipa portalne dizalice za formiranje modela strukture. Kolica su obuhvaćena kroz model pokretne mase, model pokretnog oscilatora i kroz model pokretnog oscilatora sa klatnom koji predstavlja originalan model pokretnog opterećenja. Za svaki od modela je utvrđena dinamička interakcija između ovih sistema i postavljeni su matematički modeli koji predstavljaju sistem diferencijalnih jednačina drugog reda sa promenljivim koeficijentima. Rešenja su dobijena pomoću originalnih programa, na bazi metode direktne integracije‐ Njumarkove metode. Identifikacija i analize odziva su izvršene za dva realna primera portalnih dizalica. Istražen je uticaj brzine, ubrzanja/usporenja i težine kolica, kao i uticaj klaćenja tereta i elastične opruge u sistemu kolica. Dobijeni rezultati se mogu iskoristiti u početnim fazama konstruisanja portalnih dizalica koje imaju tendenciju da ostvare veoma visoke performanse, u smislu ostvarivanja boljeg uvida u dinamičko ponašanje.
AB  - The dynamics of a two‐dimensional gantry crane structure subjected to various types of moving load is examined in this work. First, the classification of gantry cranes is suggested and group of gantry cranes at container terminals are distinguished because of high performances which have tendency to become even better in near future. The analytical approach is introduced in modeling the gantry structure as continuous system with transverse vibrations. However, modern approach, i.e. combined finite element and analytical method is adopted to solve the title problem. Two types of structure of gantry cranes are considered. Three types of trolleys are implemented in calculation, i.e. moving mass, moving oscillator and moving oscillator with swinging payload as original model are considered as moving loads acting upon the structure of the gantry cranes. The interaction between the structure and each moving load model is derived and the governing equations for MDOF systems are obtained. The postulated equations, which are second order differential equations with time dependent coefficients, are solved with direct integration method‐Newmark method. The analysis is applied to two types of gantry cranes and dynamic responses are obtained for both the structure and the trolley. There are studied factors of moving loads such as magnitude, speed, acceleration, deceleration and factors within the trolley structure such as swinging of the payload and spring stiffness. Numerical results reveal that used approach is useful and can draw conclusions for structural design purposes of gantry cranes.
PB  - Univerzitet u Beogradu, Mašinski fakultet
T1  - Dinamička interakcija noseće strukture i kolica portalnih dizalica visokih performansi
T1  - Dynamic interaction between the structure and the trolley of high performance gantry cranes
UR  - https://hdl.handle.net/21.15107/rcub_nardus_2300
ER  - 

@phdthesis{
author = "Gašić, Vlada",
year = "2013",
abstract = "U radu se analizira dinamičko ponašanje noseće konstrukcije portalne dizalice usled dejstva kolica kao pokretnog opterećenja. Dat je prikaz klasifikacije portalnih dizalica pri čemu su izdvojene portalne dizalice za kontejnerske terminale sa svojim visokih performansama koje imaju stalnu tendenciju poboljšanja. Prvo je dat koncept primene analitičkog pristupa za modeliranje noseće konstrukcije preko sistema elastičnih tela tipa prizmatične grede i razmatranje slobodnih poprečnih oscilacija. Kao savremen i pre svega neophodan, usvojen je kombinovani pristup za istraživanje naslovnog problema, tj. konačnoelementni pristup je iskorišćen za modeliranje noseće konstrukcije portalne dizalice a principi analitičke mehanike su iskorišćeni za modeliranje kolica. Razmatraju se dva najčešća konstrukciona tipa portalne dizalice za formiranje modela strukture. Kolica su obuhvaćena kroz model pokretne mase, model pokretnog oscilatora i kroz model pokretnog oscilatora sa klatnom koji predstavlja originalan model pokretnog opterećenja. Za svaki od modela je utvrđena dinamička interakcija između ovih sistema i postavljeni su matematički modeli koji predstavljaju sistem diferencijalnih jednačina drugog reda sa promenljivim koeficijentima. Rešenja su dobijena pomoću originalnih programa, na bazi metode direktne integracije‐ Njumarkove metode. Identifikacija i analize odziva su izvršene za dva realna primera portalnih dizalica. Istražen je uticaj brzine, ubrzanja/usporenja i težine kolica, kao i uticaj klaćenja tereta i elastične opruge u sistemu kolica. Dobijeni rezultati se mogu iskoristiti u početnim fazama konstruisanja portalnih dizalica koje imaju tendenciju da ostvare veoma visoke performanse, u smislu ostvarivanja boljeg uvida u dinamičko ponašanje., The dynamics of a two‐dimensional gantry crane structure subjected to various types of moving load is examined in this work. First, the classification of gantry cranes is suggested and group of gantry cranes at container terminals are distinguished because of high performances which have tendency to become even better in near future. The analytical approach is introduced in modeling the gantry structure as continuous system with transverse vibrations. However, modern approach, i.e. combined finite element and analytical method is adopted to solve the title problem. Two types of structure of gantry cranes are considered. Three types of trolleys are implemented in calculation, i.e. moving mass, moving oscillator and moving oscillator with swinging payload as original model are considered as moving loads acting upon the structure of the gantry cranes. The interaction between the structure and each moving load model is derived and the governing equations for MDOF systems are obtained. The postulated equations, which are second order differential equations with time dependent coefficients, are solved with direct integration method‐Newmark method. The analysis is applied to two types of gantry cranes and dynamic responses are obtained for both the structure and the trolley. There are studied factors of moving loads such as magnitude, speed, acceleration, deceleration and factors within the trolley structure such as swinging of the payload and spring stiffness. Numerical results reveal that used approach is useful and can draw conclusions for structural design purposes of gantry cranes.",
publisher = "Univerzitet u Beogradu, Mašinski fakultet",
title = "Dinamička interakcija noseće strukture i kolica portalnih dizalica visokih performansi, Dynamic interaction between the structure and the trolley of high performance gantry cranes",
url = "https://hdl.handle.net/21.15107/rcub_nardus_2300"
}

Gašić, V.. (2013). Dinamička interakcija noseće strukture i kolica portalnih dizalica visokih performansi. 
Univerzitet u Beogradu, Mašinski fakultet..
https://hdl.handle.net/21.15107/rcub_nardus_2300

Gašić V. Dinamička interakcija noseće strukture i kolica portalnih dizalica visokih performansi. 2013;.
https://hdl.handle.net/21.15107/rcub_nardus_2300 .

Gašić, Vlada, "Dinamička interakcija noseće strukture i kolica portalnih dizalica visokih performansi" (2013),
https://hdl.handle.net/21.15107/rcub_nardus_2300 .

TY  - JOUR
AU  - Gašić, Vlada
AU  - Zrnić, Nenad
AU  - Milovančević, Milorad
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1759
AB  - Rad se bavi problematikom pokretnog opterećenja kod portalnih dizalica visokih performansi. Usvojen je kombinovani pristup, koji podrazumeva primenu metode konačnih elemenata u kombinaciji sa jednačinama analitičke mehanike, za formiranje matematičkih modela portalne dizalice. Model kolica je razmatran kroz nekoliko modela: pokretna sila, pokretna masa, pokretni oscilator i pokretni oscilator sa klatnom. Svaki od modela ima svoje dinamičke karakteristike koje profilišu dinamički odziv strukture dizalice. Rešenja su dobijena numerički, metodom direktne integracije, razmatranjem ravanskog ramovskog konačno elementnog modela strukture pod dejstvom ekvivalentnog pokretnog opterećenja na osnovu postavljenog sistema diferencijalnih jednačina drugog reda sa promenljivim koeficijentima. Prikazana je problematika koja nastaje pri povećanju broja parametara pri formiranju dinamičkog modela-postavci matematičkog modela. Na realnom primeru dizalice su dati dinamički odzivi različitih modela koji mogu poslužiti kao preporuka za izbor modela u zavisnosti od važnosti željenih dinamičkih parametara u fazi projektovanja kontejnerskih dizalica.
AB  - The paper deals with the moving load problems within the structural dynamic analysis of a large gantry crane as high-performance machine. The emphasis is placed on combined method approach, i.e. finite element method and analytical postulations, to obtain the mathematical model of crane. Moving trolley is considered throughout several models: moving force, moving mass, moving oscillator and moving oscillator with swinging object. Each model has characteristics which determine the responses of the crane structure, along with its dynamic properties. The title problem is solved by calculating the forced vibration responses of the two-dimensional framework with time-dependent property matrices and subjected to an equivalent moving load. Improving the moving load models increases complexity as well for postulating as for obtaining the solutions from overall crane model. Comparative presentation of models is shown here with conclusion that leads to an appropriate way of model selection prior to crane problem postulation.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Specifičnosti formiranja različitih matematičkih modela pri analizi dinamičkog ponašanja portalnih dizalica za kontejnerske terminale
T1  - Considerations of various moving load models in structural dynamics of large gantry cranes
EP  - 316
IS  - 4
SP  - 311
VL  - 41
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1759
ER  - 

@article{
author = "Gašić, Vlada and Zrnić, Nenad and Milovančević, Milorad",
year = "2013",
abstract = "Rad se bavi problematikom pokretnog opterećenja kod portalnih dizalica visokih performansi. Usvojen je kombinovani pristup, koji podrazumeva primenu metode konačnih elemenata u kombinaciji sa jednačinama analitičke mehanike, za formiranje matematičkih modela portalne dizalice. Model kolica je razmatran kroz nekoliko modela: pokretna sila, pokretna masa, pokretni oscilator i pokretni oscilator sa klatnom. Svaki od modela ima svoje dinamičke karakteristike koje profilišu dinamički odziv strukture dizalice. Rešenja su dobijena numerički, metodom direktne integracije, razmatranjem ravanskog ramovskog konačno elementnog modela strukture pod dejstvom ekvivalentnog pokretnog opterećenja na osnovu postavljenog sistema diferencijalnih jednačina drugog reda sa promenljivim koeficijentima. Prikazana je problematika koja nastaje pri povećanju broja parametara pri formiranju dinamičkog modela-postavci matematičkog modela. Na realnom primeru dizalice su dati dinamički odzivi različitih modela koji mogu poslužiti kao preporuka za izbor modela u zavisnosti od važnosti željenih dinamičkih parametara u fazi projektovanja kontejnerskih dizalica., The paper deals with the moving load problems within the structural dynamic analysis of a large gantry crane as high-performance machine. The emphasis is placed on combined method approach, i.e. finite element method and analytical postulations, to obtain the mathematical model of crane. Moving trolley is considered throughout several models: moving force, moving mass, moving oscillator and moving oscillator with swinging object. Each model has characteristics which determine the responses of the crane structure, along with its dynamic properties. The title problem is solved by calculating the forced vibration responses of the two-dimensional framework with time-dependent property matrices and subjected to an equivalent moving load. Improving the moving load models increases complexity as well for postulating as for obtaining the solutions from overall crane model. Comparative presentation of models is shown here with conclusion that leads to an appropriate way of model selection prior to crane problem postulation.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Specifičnosti formiranja različitih matematičkih modela pri analizi dinamičkog ponašanja portalnih dizalica za kontejnerske terminale, Considerations of various moving load models in structural dynamics of large gantry cranes",
pages = "316-311",
number = "4",
volume = "41",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1759"
}

Gašić, V., Zrnić, N.,& Milovančević, M.. (2013). Specifičnosti formiranja različitih matematičkih modela pri analizi dinamičkog ponašanja portalnih dizalica za kontejnerske terminale. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 41(4), 311-316.
https://hdl.handle.net/21.15107/rcub_machinery_1759

Gašić V, Zrnić N, Milovančević M. Specifičnosti formiranja različitih matematičkih modela pri analizi dinamičkog ponašanja portalnih dizalica za kontejnerske terminale. in FME Transactions. 2013;41(4):311-316.
https://hdl.handle.net/21.15107/rcub_machinery_1759 .

Gašić, Vlada, Zrnić, Nenad, Milovančević, Milorad, "Specifičnosti formiranja različitih matematičkih modela pri analizi dinamičkog ponašanja portalnih dizalica za kontejnerske terminale" in FME Transactions, 41, no. 4 (2013):311-316,
https://hdl.handle.net/21.15107/rcub_machinery_1759 .