Seismic risk analysis for inter-story isolation structure collapse under main aftershock sequence

被引：0
|
作者：
Liu J. [1 ]
Huang X. [1 ,2 ]
He T. [1 ]
Wang N. [1 ]
Du Y. [3 ]
机构：
[1] School of Civil Engineering, Qinghai University, Xining
[2] Institute of Advanced Engineering Structures, Zhejiang University, Hangzhou
[3] Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 19期
关键词：
construction method of main aftershock sequence; inter-story isolation structure; risk probability; seismic risk analysis;
D O I：
10.13465/j.cnki.jvs.2023.19.026
中图分类号：
学科分类号：
摘要：
Here, to quantitatively evaluate damage of isolated structure caused by aftershock, based on the randomness of seismic waves and the complexity of structure, a construction method of main aftershock sequence suitable for isolated structure was proposed. Then, taking seismic waves chosen with the proposed construction method as the excitation, taking damage index as the structural seismic demand parameter and spectral acceleration as the seismic intensity parameter, the seismic risk analysis was performed for interlayer isolation structure under main aftershock sequence. The study results showed that with decrease in aftershock action and exceeding probability of earthquake occurrence, the structural damage index can obviously increase; compared to a single main shock action with a 50 year exceeding probability of 2% , after the aftershock occurrence with a 50 year exceeding probability of 2% , interlay er isolation structure can transit from a slightly damaged state to a moderately damaged state; aftershock action can increase target structure damage by 23. 26% and isolation layer damage by 33. 33% , aftershock action can make the risk probability of structure collapse increase by 75% , so aftershock action can exacerbate structure damage and increase the possibility of structure collapse. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：194 / 203and259
相关论文
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