Seismic Deformation Characteristics of Silty Clay-Irregular Section Subway Station Structure

被引：2
|
作者：
Tang B. [1 ]
Chen S. [2 ]
Li X. [2 ]
Zhuang H. [1 ]
Wu W. [3 ]
Miao Y. [4 ]
机构：
[1] School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, 330013, Jiangxi
[2] Institute of Geophysics, China Earthquake Administration, Beijing
[3] Shenzhen Branch Institute, Central & Southern China Municipal Engineering Design and Research General Institute Co., Ltd., Shenzhen, 518034, Guangdong
[4] School of Civil Engineering & Mechanics, Huazhong University of Science and Technology, Wuhan, 430074, Hubei
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2019年 / 40卷 / 05期
关键词：
Deformation characteristics; Irregular section structure; Seismic damage; Shaking table test; Silty clay; Subway station;
D O I：
10.3969/j.issn.1001-4632.2019.05.17
中图分类号：
学科分类号：
摘要：
Based on the prototype of irregular section subway station structure, a series of shaking table tests were performed to research the dynamic interaction between the silty clay and subway station. The shape acceleration array was used to measure the horizontal deformation of silty clay foundation, and the non-contact dynamic displacement testing technology was applied to achieve the visualization and digitalization of the damage evolution process of subway station structure. Based on the measured data, the seismic settlement and deformation of silty clay-irregular section subway station structure system were analyzed. Results show that the existence of subway station structure under strong earthquake has changed the distribution pattern of the seismic settlement of soil mass. The uneven settlement of irregular section structure is obvious, and soil-structure separation occurs at the center of the top floor. The incremental difference of the dynamic earth pressure between the top floor and bottom floor becomes the uplifting force of the vertical movement for subway station structure. The relative displacement of foundation and the depth of soil layer can be well fitted by cubic polynomial under strong ground motions. The maximum inter-story drift of the structure sub-layer is larger than that of the up-layer, and the maximum inter-story drift of the sub-layer exceeds the limit value of inter-story drift for the repairable level of underground station structure under strong earthquake, it indicates that the damage occurs in the sub-layer of structural members, especially in irregular section. The difference of section form should be considered in the anti-seismic design of subway station structure. © 2019, Editorial Department of China Railway Science. All right reserved.
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页码：128 / 137
页数：9
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