Seismic failure mode of shallow buried subway station crossing ground fissures based on static pushover analysis

被引：0
|
作者：
Xiong Z. [1 ,2 ]
Chen Z. [1 ]
Chen X. [1 ,2 ]
Zheng K. [1 ]
Xin A. [3 ,4 ]
机构：
[1] School of Civil Engineering, Xi'An University of Architecture and Technology (XAUAT), Xi'an
[2] Shaanxi Provincial Key Lab of Geotechnical and Underground Space Engineering, XAUAT, Xi'an
[3] Qinghai Building and Materials Research Institute Co., Ltd., Xining
[4] Qinghai Provincial Key Lab of Plateau Building and Eco-community, Xining
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 01期
关键词：
failure mode; ground fissures; static Pushover analysis; subway station;
D O I：
10.13465/j.cnki.jvs.2024.01.007
中图分类号：
学科分类号：
摘要：
Here, taking a shallow buried subway station located in Xi'an f4ground fissure site as the study object, shaking table tests were conducted to explore seismic damage characteristics of ground fissure site and the structure. At the same time, considering the non-uniformity of seismic response of the site, the static Pushover analysis method was used to analyze the seismic failure mode of shallow buried subway station crossing ground fissures. The results showed that the Pushover analysis method for underground structure in ground fissure site can more realistically reflect activity characteristics of ground fissure sites and failure characteristics of underground structure under earthquake action; under action of horizontal earthquakes, soil bodies on upper and lower discs of ground fissure tending to stable state mainly undergo open-merge activity, i. e., mutual squeeze and separation where mutual squeeze can exert an obvious additional compressive bending effect on structure central column; horizontal shear deformation of soil body in ground fissure site is main external factor of structural failure, and the additional compression and bending caused by activities of ground fissure can further increase the axial-compression ratio of central column, reduce the deformation capacity of central column, and accelerate seismic failure of structure; under action of specific deformation of ground fissure site, the horizontal shear deformation ability of central column in structure bottom layer is relatively weaker, and structural shear forces have an obvious spatial distribution law, central column of structure bottom layer in upper disc soil body is a key aseismic component of structure; the study results have important reference value for aseismic design of this kind of structures. © 2024 Zhendong yu Chongji/Journal of Vibration and Shock. All rights reserved.
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页码：54 / 63and70
页数：6316
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