Transverse shock-absorbing system of high-speed railway simply supported beam bridge considering seismic sliding-impact effect

被引：0
|
作者：
Yang M. [1 ]
Li M. [2 ]
Hu S. [1 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] National Engineering Research Center of High-speed Railway Construction Technology, Central South University, Changsha
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 07期
关键词：
collision effect; high-speed railway; near-fault earthquake; seismic sliding-impact effect; shock-absorbing system; simply supported beam bridge;
D O I：
10.13465/j.cnki.jvs.2023.07.036
中图分类号：
学科分类号：
摘要：
Here, transverse impact response and shock-absorbing system of high-speed railway simply supported beam bridge under near-fault seismic sliding-impact effect were studied. Taking a 5-span 32 m simply supported beam bridge as the background, the whole bridge finite element (FE) model was established using the FE software Abaqus. Differences of lateral seismic responses of bridge under actions of far-field and near-fault seismic sliding-impact effects were analyzed, and the applicability of traditional anti-seismic block was explored. Shock-absorbing effects of 3 shock-absorbing systems including combination of " block + cable", cable stopper installed alone overall bridge and damping tenon installed alone overall bridge were analyzed contrastively. The results showed that compared with far-field earthquake, traditional anti-seismic block fails fully and the risk of beam-falling significantly increases under the action of near-fault seismic sliding-impact effect; the smaller the gap between block and pad stone, the better the damping effect of "block + cable" ; damping effect of cable stopper increases with decrease in free path of cable; when damping tenon has the optimal stiffness, bridge seismic response can be significantly reduced; through comprehensive comparison, shock-absorbing system with damping tenon installed alone overall bridge is the best. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：312 / 320
页数：8
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