Influence of overburden load on seismic performance of shallow buried underground structures

被引：0
作者：
Zhang J. [1 ,2 ]
Yu Z. [3 ]
Zhang H. [1 ,2 ]
Zhang Z. [1 ,2 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] Key Laboratory of Urban Underground Engineering of MOE, Beijing Jiaotong University, Beijing
[3] First Construction Engineering Company Ltd. of China Construction Second Engineering Bureau, Beijing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 10期
关键词：
axial compression ratio; dynamic finite element analysis; seismic damage; seismic performance; underground structures;
D O I：
10.13465/j.cnki.jvs.2023.10.031
中图分类号：
学科分类号：
摘要：
It is of great significance to ensure the sufficient seismic performance of underground structures for reducing structural damage and improving post-disaster recovery efficiency. Therefore, based on the static-dynamic coupling nonlinear numerical analysis method, the developing characteristics of bending plastic hinges of typical subway stations and the ductility demand of critical load-bearing component sections under different overburden loads were analyzed. The results show that the bending plastic hinge first appears at the end sections of central columns under seismic action,and the high axial compression ratio significantly weakens the seismic performance of columns,which leads to the degradation of the structural horizontal deformation capacity. The influence of the overburden load conditions on the ductility coefficient of the central column sections is significant, but the influence on the side wall is limited. The relationship between the sectional ductility coefficient of the load-bearing components and the interlayer drift ratio can be described by quadratic polynomial functions, and the corresponding fitting functions can provide relevant references for evaluating column ductility demand in the seismic design. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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收藏
页码：263 / 272
页数：9
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