Influence of Performance Degradation of Seismic Isolation Bearings on Seismic Response of Existing Bridges

DOI

10.2991/978-94-6463-564-5_7How to use a DOI?

Keywords

existing bridge; seismic isolation bearings; performance degradation; seismic response

Abstract

In order to study the effect of degradation of isolation bearing performance on the seismic response of in-service bridges, a continuous girder bridge is combined to analyse the effect of degradation of isolation bearing performance on the horizontal displacement of the bearing, the vertical reaction force, the bridge self-oscillation period and the response of internal force. The results show that: with the increase of bearing degradation, continuous beam bridge stiffness decreases, the self-oscillation period increases; bearing in the longitudinal and transverse seismic horizontal displacement and vertical reaction force increases as a whole; longitudinal seismic, the transition pier and the second pier pier bottom bending moment and the transition pier pier pier bottom and top shear increases as a whole, the main pier pier pier bottom bending moment, the transition pier, the secondary pier and the main pier pier pier top bending moment and the secondary pier and the main pier pier pier top and the pier bottom and pier shear decreases as a whole; transverse seismic, the transition pier pier bottom bending moment, the transition pier bottom and the main pier top shear decreases as a whole. Under the seismic, the transition pier bottom and pier top bending moment and shear overall increase, the secondary main pier and the main pier bottom and pier top bending moment, the secondary main pier bottom and pier top and the main pier bottom shear overall decrease, the main pier top shear first increase and then decrease.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Hao Zheng
AU  - Xin Shi
AU  - Xuqi Liu
PY  - 2024
DA  - 2024/10/31
TI  - Influence of Performance Degradation of Seismic Isolation Bearings on Seismic Response of Existing Bridges
BT  - Proceedings of the 2024 International Conference on Civil Engineering Structures and Concrete Materials (CESCM 2024)
PB  - Atlantis Press
SP  - 56
EP  - 67
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-564-5_7
DO  - 10.2991/978-94-6463-564-5_7
ID  - Zheng2024
ER  -