Seismic response of fluid-structure interaction of undersea tunnel during bidirectional earthquake

Xuansheng Cheng*, Weiwei Xu, Caiquan Yue, Xiuli Du, Charles Dowding

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

In this study, the seismic response of the fluid-structure interaction (FSI) of an undersea tunnel in a broken fault zone during a bidirectional earthquake is examined. An undersea tunnel FSI model that accounts for the effects of the viscoelastic artificial boundary, seepage, and dynamic liquid pressure, and considers the rock mass as a saturated porous medium, is created through finite element analysis software ADINA. The seismic response of the undersea tunnel is determined by considering both horizontal and vertical ground motion and analyzing the time history curve of the displacement, acceleration, and principal stress of the lining key point. Numerical results show that (1) the maximum displacement, acceleration, and tensile stress of the lining structure are all present in the vault area; (2) the time history curves of the displacement, acceleration, and principal stress of the key points follow a similar variation law; (3) the vertical displacement of the lining structure is greater than its horizontal displacement; and (4) tensile areas generally appear in the vault and inverted arch, but the hance is in the compression state.

Original languageEnglish (US)
Pages (from-to)64-70
Number of pages7
JournalOcean Engineering
Volume75
DOIs
StatePublished - Jan 1 2014

Keywords

  • Bidirectional earthquake
  • Fluid-structure interaction
  • Seepage
  • Seismic response
  • Undersea tunnel

ASJC Scopus subject areas

  • Ocean Engineering
  • Environmental Engineering

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