• 综合
  • 标题
  • 关键词
  • 摘要
  • 学者
  • 期刊-刊名
  • 期刊-ISSN
  • 会议名称
搜索

作者:

Shen, Yiyao (Shen, Yiyao.) | Zhong, Zilan (Zhong, Zilan.) | Li, Liyun (Li, Liyun.) | Du, Xiuli (Du, Xiuli.) | El Naggar, M. Hesham (El Naggar, M. Hesham.)

收录:

EI Scopus SCIE

摘要:

Long-extended underground structures such as shield-driven tunnels may be constructed through sandwiched liquefiable soil profiles, which can compromise their integrity during strong earthquakes. In this study, the influence of sandwiched liquefiable soil layer on the seismic response of shield tunnels under ground motions with different frequency contents is evaluated through nonlinear numerical simulations. Six soil-shield tunnel finite element models with different sandwiched liquefiable soil profiles are developed using the open-source software framework OpenSees. The solid-fluid fully coupled dynamic effective stress analysis method is adopted for the nonlinear seismic analysis of liquefiable soil. The numerical results demonstrate that the frequency contents of earthquake motion and the spatial location of the sandwiched liquefiable soil profile have great influence on the dynamic responses of the segmental tunnel. In all cases studied, the bottom half of the tunnel embedded in the liquefiable soil layer experienced the most unfavorable condition for the seismic performance. The deformations and internal forces of the segmental joints around the tunnel foot are remarkably higher than at other joints under the same ground motion intensity. Moreover, the Kobe motion with the low-frequency content would significantly amplify the seismic responses of both the site and the segmental tunnel compared to the Chi-Chi motion with the high-frequency content in different sandwiched liquefiable soil deposits. It is also found that the racking ratio of the non-liquefiable soil layer is greater than that of the liquefiable soil layer, which means that the surrounding soil with large shear deformation pushes the underground structure leading to larger adverse lateral deformation of the structure.

关键词:

Frequency contents Soil-structure interaction Segmental joints Soil liquefaction Sandwiched liquefiable soil layer Effective stress analysis

作者机构:

  • [ 1 ] [Shen, Yiyao]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educauon, Beijing, Peoples R China
  • [ 2 ] [Zhong, Zilan]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educauon, Beijing, Peoples R China
  • [ 3 ] [Li, Liyun]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educauon, Beijing, Peoples R China
  • [ 4 ] [Du, Xiuli]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educauon, Beijing, Peoples R China
  • [ 5 ] [El Naggar, M. Hesham]Western Univ, Dept Civil & Environm Engn, London, ON, Canada

通讯作者信息:

电子邮件地址:

查看成果更多字段

相关关键词:

来源 :

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY

ISSN: 0886-7798

年份: 2023

卷: 140

6 . 9 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:19

被引次数:

WoS核心集被引频次:

SCOPUS被引频次: 19

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

近30日浏览量: 0

归属院系:

在线人数/总访问数:502/4953278
地址:北京工业大学图书馆(北京市朝阳区平乐园100号 邮编:100124) 联系我们:010-67392185
版权所有:北京工业大学图书馆 站点建设与维护:北京爱琴海乐之技术有限公司