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作者:

Jiang, Jiawei (Jiang, Jiawei.) | Tao, Ran (Tao, Ran.) | El Naggar, M. Hesham (El Naggar, M. Hesham.) | Liu, Hen (Liu, Hen.) | Du, Xiuli (Du, Xiuli.)

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EI Scopus SCIE

摘要:

This paper investigates the seismic performance of complex comprehensive interchange underground structures. As an example, the seismic performance of Nanjing underground bifurcated tunnels constructed in soft soil is analyzed. A three-dimensional (3D) numerical finite element analysis model is established considering soiltunnel interaction to analyze the seismic response characteristics and failure mechanism of the bifurcated tunnels. The results show that the tunnel damage degree is closely associated with the deformation response, and that the inter-story drift ratio of the lower layer is significantly greater than that of the upper layer. The pushover analysis method is used to obtain the seismic performance curve of the tunnel, and inter-story drift ratio limits are defined. The IDA procedure is then used to conduct multiple non-linear dynamic time history analyses based on the 3D finite element model, and IDA curve clusters are drawn with peak ground acceleration (PGA) as the earthquake intensity measures and the peak inter-story drift ratio as the damage measures of tunnels. The corresponding IDA percentiles lines are calculated, and the seismic fragility curves of the bifurcated tunnels are established. The post-earthquake functional failure probability of the bifurcated tunnels is obtained under different seismic fortification performance level.

关键词:

Bifurcated tunnels Seismic fragility Numerical simulation Soft soil Seismic failure mechanism

作者机构:

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

通讯作者信息:

  • [Liu, Hen]Nanjing Tech Univ, Inst Geotech Engn, Nanjing, Peoples R China

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来源 :

COMPUTERS AND GEOTECHNICS

ISSN: 0266-352X

年份: 2024

卷: 167

5 . 3 0 0

JCR@2022

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ESI高被引论文在榜: 4 展开所有

  • 2024-11
  • 2024-11
  • 2024-9
  • 2024-9

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