TY  - CONF
AU  - Liolios, A.
AU  - Liolios, K.
AU  - Folić, Boris
AU  - Georgiev, K.
AU  - Georgiev, I.
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6971
AB  - The paper deals with two computational approaches for the unilateral contact problem of dynamic soil-pipeline interaction induced by high-speed moving loading sources. Unilateral contact effects due to tensionless soil capacity, soil elastoplastic-fracturing behaviour and gapping, which may be significant, are strictly taken into account, as well as environmental effects decreasing the soil resistance. The first numerical approach, called inequality approach, is based on a double discretization, in space by the Finite Element Method combined with Boundary Element Method, and in time, and on nonconvex optimization. By convolutional procedures, the number of the problem unknowns is significantly reduced and a nonconvex linear complementarity problem is solved in each time-step. The second numerical approach, called incremental approach, uses the Ruaumoko structural engineering software. Both presented methods are useful in geotechnical praxis for the resistant construction, design and control of buried pipelines against man-made soil vibrations as well as seismic excitations.
PB  - Savez građevinskih inženjera Srbije
PB  - Association of Civil Engineers of Serbia
PB  - Srpsko društvo za mehaniku tla i geotehničko inženjerstvo
PB  - Institut IMS A.D. Beograd
PB  - SET d.o.o. Šabac
C3  - Conference Proceedings [of] Seventh International Conference Geotechnics in Civil Engineering
T1  - Dynamic soil-pipeline interaction induced by high-speed traffic under environmental effects: two computational approaches
EP  - 550
SP  - 541
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6971
ER  - 

@conference{
author = "Liolios, A. and Liolios, K. and Folić, Boris and Georgiev, K. and Georgiev, I.",
year = "2017",
abstract = "The paper deals with two computational approaches for the unilateral contact problem of dynamic soil-pipeline interaction induced by high-speed moving loading sources. Unilateral contact effects due to tensionless soil capacity, soil elastoplastic-fracturing behaviour and gapping, which may be significant, are strictly taken into account, as well as environmental effects decreasing the soil resistance. The first numerical approach, called inequality approach, is based on a double discretization, in space by the Finite Element Method combined with Boundary Element Method, and in time, and on nonconvex optimization. By convolutional procedures, the number of the problem unknowns is significantly reduced and a nonconvex linear complementarity problem is solved in each time-step. The second numerical approach, called incremental approach, uses the Ruaumoko structural engineering software. Both presented methods are useful in geotechnical praxis for the resistant construction, design and control of buried pipelines against man-made soil vibrations as well as seismic excitations.",
publisher = "Savez građevinskih inženjera Srbije, Association of Civil Engineers of Serbia, Srpsko društvo za mehaniku tla i geotehničko inženjerstvo, Institut IMS A.D. Beograd, SET d.o.o. Šabac",
journal = "Conference Proceedings [of] Seventh International Conference Geotechnics in Civil Engineering",
title = "Dynamic soil-pipeline interaction induced by high-speed traffic under environmental effects: two computational approaches",
pages = "550-541",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6971"
}

Liolios, A., Liolios, K., Folić, B., Georgiev, K.,& Georgiev, I.. (2017). Dynamic soil-pipeline interaction induced by high-speed traffic under environmental effects: two computational approaches. in Conference Proceedings [of] Seventh International Conference Geotechnics in Civil Engineering
Savez građevinskih inženjera Srbije., 541-550.
https://hdl.handle.net/21.15107/rcub_machinery_6971

Liolios A, Liolios K, Folić B, Georgiev K, Georgiev I. Dynamic soil-pipeline interaction induced by high-speed traffic under environmental effects: two computational approaches. in Conference Proceedings [of] Seventh International Conference Geotechnics in Civil Engineering. 2017;:541-550.
https://hdl.handle.net/21.15107/rcub_machinery_6971 .

Liolios, A., Liolios, K., Folić, Boris, Georgiev, K., Georgiev, I., "Dynamic soil-pipeline interaction induced by high-speed traffic under environmental effects: two computational approaches" in Conference Proceedings [of] Seventh International Conference Geotechnics in Civil Engineering (2017):541-550,
https://hdl.handle.net/21.15107/rcub_machinery_6971 .

TY  - CONF
AU  - Liolios, Ang.
AU  - Liolios, Kon.
AU  - Folić, Boris
AU  - Georgiev, Kra.
AU  - Georgiev, I.
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7440
AB  - The seismic upgrading of environmentally degraded existing reinforced concrete (RC)
structures by using ties (cable) elements is numerically investigated. Emphasis is given to
select the optimal strengthening version of ties system for the response of such RC
structures under multiple earthquakes effects. Damage indices are computed in order to
compare these responses before and after the retrofit by cable element strengthening, and so
to select the optimum strengthening version. For a typical example problem, the
effectiveness of the proposed computational approach is presented.
PB  - Savez građevinskih inženjera Srbije
PB  - SGIS
C3  - Zbornik radova = Conference Proceedings / Peto međunarodno naučno-stručno savetovanje Zemljotresno inženjerstvo i inženjerska seizmologija, Sremski Karlovci
T1  - Choice of the optimal ties system concerning the seismic upgrading of RC structures under multiple earthquakes
EP  - 452
SP  - 443
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7440
ER  - 

@conference{
author = "Liolios, Ang. and Liolios, Kon. and Folić, Boris and Georgiev, Kra. and Georgiev, I.",
year = "2016",
abstract = "The seismic upgrading of environmentally degraded existing reinforced concrete (RC)
structures by using ties (cable) elements is numerically investigated. Emphasis is given to
select the optimal strengthening version of ties system for the response of such RC
structures under multiple earthquakes effects. Damage indices are computed in order to
compare these responses before and after the retrofit by cable element strengthening, and so
to select the optimum strengthening version. For a typical example problem, the
effectiveness of the proposed computational approach is presented.",
publisher = "Savez građevinskih inženjera Srbije, SGIS",
journal = "Zbornik radova = Conference Proceedings / Peto međunarodno naučno-stručno savetovanje Zemljotresno inženjerstvo i inženjerska seizmologija, Sremski Karlovci",
title = "Choice of the optimal ties system concerning the seismic upgrading of RC structures under multiple earthquakes",
pages = "452-443",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7440"
}

Liolios, Ang., Liolios, Kon., Folić, B., Georgiev, Kra.,& Georgiev, I.. (2016). Choice of the optimal ties system concerning the seismic upgrading of RC structures under multiple earthquakes. in Zbornik radova = Conference Proceedings / Peto međunarodno naučno-stručno savetovanje Zemljotresno inženjerstvo i inženjerska seizmologija, Sremski Karlovci
Savez građevinskih inženjera Srbije., 443-452.
https://hdl.handle.net/21.15107/rcub_machinery_7440

Liolios A, Liolios K, Folić B, Georgiev K, Georgiev I. Choice of the optimal ties system concerning the seismic upgrading of RC structures under multiple earthquakes. in Zbornik radova = Conference Proceedings / Peto međunarodno naučno-stručno savetovanje Zemljotresno inženjerstvo i inženjerska seizmologija, Sremski Karlovci. 2016;:443-452.
https://hdl.handle.net/21.15107/rcub_machinery_7440 .

Liolios, Ang., Liolios, Kon., Folić, Boris, Georgiev, Kra., Georgiev, I., "Choice of the optimal ties system concerning the seismic upgrading of RC structures under multiple earthquakes" in Zbornik radova = Conference Proceedings / Peto međunarodno naučno-stručno savetovanje Zemljotresno inženjerstvo i inženjerska seizmologija, Sremski Karlovci (2016):443-452,
https://hdl.handle.net/21.15107/rcub_machinery_7440 .