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作者:

Jiang, Jiawei (Jiang, Jiawei.) | El Naggar, M. Hesham (El Naggar, M. Hesham.) | Xu, Chengshun (Xu, Chengshun.) | Du, Xiuli (Du, Xiuli.)

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摘要:

Seismic response and vulnerability of subway station underground structures are greatly influenced by kinematic soil-structure interaction, which is a function of soil properties and stiffness. Therefore, this paper investigates the influence of parameters associated with soil-to-structure relative stiffness (F) on the seismic fragility curves of underground structures. Incremental dynamic analysis method is conducted employing finite element analysis to establish the fragility curves of the station structure considering 44 earthquake records. The soil was simulated as a two-dimensional (2D) finite element domain and its nonlinear behavior is described employing the Davidenkov constitutive model. Appropriate plasticity models simulated the nonlinearity of concrete and reinforcing rebars. It was found that the failure probability of the structure decreases significantly as soil shear wave velocity increases, and the change of probability of structural failure was quantified for changes in shear wave velocity within the range 200 m/s to 600 m/s. It was also found that the failure probability of subway station in heterogeneous soil is significantly higher than that of a structure buried in homogeneous soil. On the other hand, the cross-section type of the structure has less influence on its seismic vulnerability. The seismic performance of the structure with higher F is relatively better, while there are special cases where some structures with high F that are more susceptible to failure under earthquake than structures with lower F. The findings can provide helpful guide for the performance-based seismic design of underground structures.

关键词:

Soil -to -Structure relative stiffness Seismic fragility curves Subway station Incremental dynamic analysis

作者机构:

  • [ 1 ] [Jiang, Jiawei]Nanjing Tech Univ, Inst Geotech Engn, Nanjing, Peoples R China
  • [ 2 ] [El Naggar, M. Hesham]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Xu, Chengshun]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 4 ] [Du, Xiuli]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 5 ] [El Naggar, M. Hesham]Western Univ, Dept Civil & Environm Engn, London, ON, Canada

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来源 :

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY

ISSN: 0886-7798

年份: 2023

卷: 135

6 . 9 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:19

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SCOPUS被引频次: 18

ESI高被引论文在榜: 0 展开所有

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