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S. Sengupta, S. Kanike, A. Dutta, "Numerical Analysis for Multi-Support Excitation of a Long Bridge with Tall Piers", in P. Ivanyi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Seventeenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 6, Paper 11.2, 2023, doi:10.4203/ccc.6.11.2

Keywords: long bridge, tall piers, seismic performance, conditional simulation, asynchronous motion, multi-support excitation.

Abstract

The study is related to the assessment of seismic performance of long multi-span railway bridge with through type open web superstructure and located in the highest seismic zone of India. Piers are tall with heights varying from 60 to 140 m. In a long bridge, spatial variation in the input seismic excitation should be considered and the effect of such excitation at different pier foundation level on the seismic performance of the overall bridge should be assessed. A detailed finite element model with soilstructure interaction is considered. Asynchronous ground motions are modelled using conditional simulation by considering the coherency losses and a time delay of arrival with change in phase as well as amplitude of the earthquake signals from origin to the spatial points of interest along the bridge. Multi-support excitation of the bridge is performed by converting the acceleration time history to displacement time history. The responses at different pier locations for the synchronous and asynchronous motion are evaluated and the requirement of asynchronous input in multi-support excitation for long bridge with tall piers are observed to be significant for assessment of safety of running vehicle.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 6 PROCEEDINGS OF THE SEVENTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: P. Ivanyi, J. Kruis and B.H.V. Topping Paper 11.2 Numerical Analysis for Multi-Support Excitation of a Long Bridge with Tall Piers S. Sengupta, S. Kanike and A. Dutta Civil Engineering Department, IIT Guwahati, India doi:10.4203/ccc.6.11.2 Full Bibliographic Reference for this paper S. Sengupta, S. Kanike, A. Dutta, "Numerical Analysis for Multi-Support Excitation of a Long Bridge with Tall Piers", in P. Ivanyi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Seventeenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 6, Paper 11.2, 2023, doi:10.4203/ccc.6.11.2 Keywords: long bridge, tall piers, seismic performance, conditional simulation, asynchronous motion, multi-support excitation. Abstract The study is related to the assessment of seismic performance of long multi-span railway bridge with through type open web superstructure and located in the highest seismic zone of India. Piers are tall with heights varying from 60 to 140 m. In a long bridge, spatial variation in the input seismic excitation should be considered and the effect of such excitation at different pier foundation level on the seismic performance of the overall bridge should be assessed. A detailed finite element model with soilstructure interaction is considered. Asynchronous ground motions are modelled using conditional simulation by considering the coherency losses and a time delay of arrival with change in phase as well as amplitude of the earthquake signals from origin to the spatial points of interest along the bridge. Multi-support excitation of the bridge is performed by converting the acceleration time history to displacement time history. The responses at different pier locations for the synchronous and asynchronous motion are evaluated and the requirement of asynchronous input in multi-support excitation for long bridge with tall piers are observed to be significant for assessment of safety of running vehicle. download the full-text of this paper (PDF, 10 pages, 860 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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