Application of incremental dynamic analysis and the cloud method in the seismic vulnerability analysis of underground structures

被引：0
|
作者：
Jiang J. [1 ]
Wang S. [1 ]
Xu C. [2 ]
Du X. [2 ]
Chen G. [1 ]
机构：
[1] Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing
[2] Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2023年 / 44卷 / 09期
关键词：
cloud method; earthquake resistance of underground structures; frame structure; incremental dynamic analysis (IDA); numerical analysis; seismic vulnerability; subway station;
D O I：
10.11990/jheu.202206001
中图分类号：
学科分类号：
摘要：
By taking the structure of a two-story two-span subway station as the research object, a two-dimensional finite element model considering soil-structure interaction is established on the ABAQUS/ standard software platform to study the seismic vulnerability analysis of underground structures based on the cloud and incremental dynamic analysis (IDA) methods. The model employs the nonlinear time-history dynamic analysis method to obtain the dynamic response of the structure under the action of 502 original ground motion records (cloud method) and 44 scaled ground motions (IDA method). Interstory drift ratio is selected as the damage measure index, and PGA is chosen as the intensity measure index of ground motion. The seismic fragility curves of the underground subway station structure are established on the basis of the calculation results of the cloud and IDA methods. The postearthquake functional failure probability of the underground structure evaluated by the cloud method is equal to that calculated by the IDA method, and the maximum difference between both values is only 7. 5%. In contrast to the cloud method, the seismic vulnerability analysis based on the IDA method can assess the failure probability of the underground structure at any ground motion intensity level because the amplitude can be scaled. The finding mentioned above could provide a scientific reference for a performance-based method for the analysis of the seismic design of underground structures. © 2023 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：1445 / 1452
页数：7
相关论文
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