Scholarlink

<p>Crossing horizontally non-homogeneous soil during utility tunnel construction negatively affects its seismic performance. In dynamic disasters, oblique incidence of seismic waves cause more severe damage to underground structures. To address this, this paper derives and verifies an equivalent node load formula for oblique incidence of SV waves on horizontally non-homogeneous sites with viscous-spring artificial boundary. Using complex function theory and conformal mapping, the rectangular section utility tunnel is transformed into a circular section, and the analytical solution for internal forces is derived. Three-dimensional finite element models are established to study the dynamic response and damage mechanism of the utility tunnel and surrounding soil under oblique incidence of seismic waves. The results at 0° are compared with shaking table tests and analytical results to assess reliability. The findings show that the incidence angle significantly impacts acceleration, earth pressure, and relative slippage between the tunnel and soil. The angle is sensitive to higher peak ground accelerations, with seismic waves at angles slightly above the critical angle being particularly damaging. This study’s results can inform seismic design of utility tunnels.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Seismic Response of Utility Tunnels Under Oblique SV Wave Incidence in Horizontally Nonhomogeneous Sites

  • 期刊论文

  • 发表日期：

    2025年12月20日

查看全文
  • De-long Huang,
  • Hui-yue Wang,
  • Yang Ding,
  • Hang Cen,
  • Qiang Liu,
  • Zhong-ling Zong,
  • Dian-rui Mu,
  • Ai-ping Tang

摘要

Crossing horizontally non-homogeneous soil during utility tunnel construction negatively affects its seismic performance. In dynamic disasters, oblique incidence of seismic waves cause more severe damage to underground structures. To address this, this paper derives and verifies an equivalent node load formula for oblique incidence of SV waves on horizontally non-homogeneous sites with viscous-spring artificial boundary. Using complex function theory and conformal mapping, the rectangular section utility tunnel is transformed into a circular section, and the analytical solution for internal forces is derived. Three-dimensional finite element models are established to study the dynamic response and damage mechanism of the utility tunnel and surrounding soil under oblique incidence of seismic waves. The results at 0° are compared with shaking table tests and analytical results to assess reliability. The findings show that the incidence angle significantly impacts acceleration, earth pressure, and relative slippage between the tunnel and soil. The angle is sensitive to higher peak ground accelerations, with seismic waves at angles slightly above the critical angle being particularly damaging. This study’s results can inform seismic design of utility tunnels.