Large-scale cyclic-loading pushover test method and its verification for seismic damage of underground structures

被引：0
|
作者：
Yang J. [1 ]
Zhuang H. [1 ,2 ]
Wang W. [1 ]
Zhang G. [1 ]
Chen S. [3 ]
机构：
[1] Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing
[2] School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang
[3] College of Architecture and Civil Engineering, Beijing University of Technology, Beijing
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2023年 / 45卷 / 04期
关键词：
cyclic-loading pushover test; numerical simulation; seismic damage; seismic performance level; underground subway station;
D O I：
10.11779/CJGE20220025
中图分类号：
学科分类号：
摘要：
It is difficult to effectively simulate the seismic damage characteristics of underground structures and their failure process in the current shaking table model tests. A large-scale 1∶7 pushover test on an underground subway station structure is designed and carried out. Taking Daikai subway station structure as the prototype, considering the equivalent soil pressure and the interlayer displacement ratio division system, the cyclic-loading curve based on displacement is finally determined. At the same time, it is compared with the results of the numerical simulation. The results show that the tensile cracks appear at the ends of the column earlier than at the other components of the structure, and then the compression damage occurs. As the bearing capacity of the column decreases, the internal forces of the structure begin to redistribute, and the overlying soil pressure gradually transfers to the walls, which causes the cracks at the ends of the roof to start to develop. At the same time, the concrete at the ends of the walls is damaged, and finally, the structure eventually loses its bearing capacity. Compared with the numerical simulation results, the designed large-scale pushover tests on the seismic response of the underground structures can accurately simulate the seismic failure process of the single-story underground station structures. At the same time, compared with the existing researches on the seismic performance levels of the single-story underground subway station structures, it is further verified that the proposed new large-scale pushover test method can reasonably reproduce the seismic performance levels of the single-story underground structures. © 2023 Chinese Society of Civil Engineering. All rights reserved.
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页码：796 / 804
页数：8
相关论文
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