Failure Analysis of the Tower Crane Counterjib
Апстракт
Failures of the cranes' structural parts unavoidably lead to serious damages or total collapses; these accidents are often followed by very high financial losses and possibly serious injuries or crane-related fatalities. The objective of this research was to identify the causes that led to the failure of the hammerhead tower crane (x1425C) counteijib. The crane is used for assembly works at the hydropower dam. The counteijib collapse resulted from a gusset plate failure and caused such significant damage of the whole crane structure that the crane was dismantled and removed from operation. The study of the accident includes: (1) Identification of the stress-state, where a FEM model is developed to provide a useful tool for studying stress analysis; (2) Laboratory investigations are conducted in order to define the chemical composition and mechanical properties of the material, the tensile properties, hardness, impact toughness, as well as the metallographic analyses. The analysis of th...e obtained results showed that the principal reasons behind the gusset plate failure originated from design and fabrication faults. The working stress was higher than the allowable one. Also, impact toughness was too low and the fabrication of welds was incorrect.
Кључне речи:
tower crane counterjib collapse / FEA / failure analysis / experimental investigationИзвор:
11th International Conference on The Mechanical Behavior of Materials (ICM11), 2011, 10Издавач:
- Elsevier Science Bv, Amsterdam
Финансирање / пројекти:
- Одрживост и унапређење машинских система у енергетици и транспорту применом форензичког инжењерства, еко и робуст дизајна (RS-MESTD-Technological Development (TD or TR)-35006)
DOI: 10.1016/j.proeng.2011.04.370
ISSN: 1877-7058
WoS: 000300451302044
Scopus: 2-s2.0-80052919240
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Zrnić, Nenad AU - Bošnjak, Srđan AU - Gašić, Vlada AU - Arsić, Miodrag A. AU - Petković, Zoran D. PY - 2011 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1172 AB - Failures of the cranes' structural parts unavoidably lead to serious damages or total collapses; these accidents are often followed by very high financial losses and possibly serious injuries or crane-related fatalities. The objective of this research was to identify the causes that led to the failure of the hammerhead tower crane (x1425C) counteijib. The crane is used for assembly works at the hydropower dam. The counteijib collapse resulted from a gusset plate failure and caused such significant damage of the whole crane structure that the crane was dismantled and removed from operation. The study of the accident includes: (1) Identification of the stress-state, where a FEM model is developed to provide a useful tool for studying stress analysis; (2) Laboratory investigations are conducted in order to define the chemical composition and mechanical properties of the material, the tensile properties, hardness, impact toughness, as well as the metallographic analyses. The analysis of the obtained results showed that the principal reasons behind the gusset plate failure originated from design and fabrication faults. The working stress was higher than the allowable one. Also, impact toughness was too low and the fabrication of welds was incorrect. PB - Elsevier Science Bv, Amsterdam C3 - 11th International Conference on The Mechanical Behavior of Materials (ICM11) T1 - Failure Analysis of the Tower Crane Counterjib VL - 10 DO - 10.1016/j.proeng.2011.04.370 ER -
@conference{ author = "Zrnić, Nenad and Bošnjak, Srđan and Gašić, Vlada and Arsić, Miodrag A. and Petković, Zoran D.", year = "2011", abstract = "Failures of the cranes' structural parts unavoidably lead to serious damages or total collapses; these accidents are often followed by very high financial losses and possibly serious injuries or crane-related fatalities. The objective of this research was to identify the causes that led to the failure of the hammerhead tower crane (x1425C) counteijib. The crane is used for assembly works at the hydropower dam. The counteijib collapse resulted from a gusset plate failure and caused such significant damage of the whole crane structure that the crane was dismantled and removed from operation. The study of the accident includes: (1) Identification of the stress-state, where a FEM model is developed to provide a useful tool for studying stress analysis; (2) Laboratory investigations are conducted in order to define the chemical composition and mechanical properties of the material, the tensile properties, hardness, impact toughness, as well as the metallographic analyses. The analysis of the obtained results showed that the principal reasons behind the gusset plate failure originated from design and fabrication faults. The working stress was higher than the allowable one. Also, impact toughness was too low and the fabrication of welds was incorrect.", publisher = "Elsevier Science Bv, Amsterdam", journal = "11th International Conference on The Mechanical Behavior of Materials (ICM11)", title = "Failure Analysis of the Tower Crane Counterjib", volume = "10", doi = "10.1016/j.proeng.2011.04.370" }
Zrnić, N., Bošnjak, S., Gašić, V., Arsić, M. A.,& Petković, Z. D.. (2011). Failure Analysis of the Tower Crane Counterjib. in 11th International Conference on The Mechanical Behavior of Materials (ICM11) Elsevier Science Bv, Amsterdam., 10. https://doi.org/10.1016/j.proeng.2011.04.370
Zrnić N, Bošnjak S, Gašić V, Arsić MA, Petković ZD. Failure Analysis of the Tower Crane Counterjib. in 11th International Conference on The Mechanical Behavior of Materials (ICM11). 2011;10. doi:10.1016/j.proeng.2011.04.370 .
Zrnić, Nenad, Bošnjak, Srđan, Gašić, Vlada, Arsić, Miodrag A., Petković, Zoran D., "Failure Analysis of the Tower Crane Counterjib" in 11th International Conference on The Mechanical Behavior of Materials (ICM11), 10 (2011), https://doi.org/10.1016/j.proeng.2011.04.370 . .