Analysis of Effects of Weak Interlayer on Seismic Responses of Underground Structures

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Analysis of Effects of Weak Interlayer on Seismic Responses of Underground Structures

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[1]Wu Yan,Xu Zigang,Du Xiuli,et al.Analysis of Effects of Weak Interlayer on Seismic Responses of Underground Structures[J].Journal of Zhengzhou University (Engineering Science),2021,42(04):91-97.[doi:10.13705/j.issn.1671-6833.2021.04.014]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 42卷 Number of periods: 2021 04 Page number: 91-97 Column: Public date: 2021-07-30

Title:: Analysis of Effects of Weak Interlayer on Seismic Responses of Underground Structures

Author(s):: Wu Yan; Xu Zigang; Du Xiuli;; Key Laboratory of the Ministry of Education of the Ministry of Education of City and Engineering Safety and Engineering of Beijing University of Technology; Key Laboratory of Safety and Control of Geotechnical Engineering Infrastructure Infrastructure of East China Jiaotong University;

Keywords:: weak interlayer; underground structure; seismic analysis; time history analysis

CLC:: -

DOI:: 10.13705/j.issn.1671-6833.2021.04.014

Abstract:: Underground structures seismic damage investigation indicated underground structures damage occurred more often in the non-uniform field.In order to study the influence of the location and thickness of weak interlayer on the seismic response of underground structure,a 2D soil-structure interaction model for a single-layer double span metro station structure was established based on the large-scale general finite element analysis software ABAQUS.The dynamic time history analysis method based on equivalent linearization was used to compare the seismic response of three seismic records with different spectral characteristics under normal incidence.The relative displacement of the top and bottom of the lower structure and the change of the internal force of the column in the key supporting components were analyzed.Analysis results showed that the existence of weak interlayers had a great influence on the seismic responses of the underground structures,especially when the weak interlayer was located in the middle of the structure and had a certain thickness,the seismic response of underground structures greatly increased than that of the conventional uniform site condition.As a result,in the practical engineering design，it should be seriously considered to cope with the existence of weak interlayer.

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