A numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness matrix and domain reduction methods

Yusheng Yang, Haitao Yu, Yong Yuan, Dechun Lu, Qiangbing Huang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

A numerical framework was proposed for the seismic analysis of underground structures in layered ground under inclined P-SV waves. The free-field responses are first obtained using the stiffness matrix method based on plane-wave assumptions. Then, the domain reduction method was employed to reproduce the wavefield in the numerical model of the soil–structure system. The proposed numerical framework was verified by providing comparisons with analytical solutions for cases involving free-field responses of homogeneous ground, layered ground, and pressure-dependent heterogeneous ground, as well as for an example of a soil–structure interaction simulation. Compared with the viscous and viscous-spring boundary methods adopted in previous studies, the proposed framework exhibits the advantage of incorporating oblique incident waves in a nonlinear heterogeneous ground. Numerical results show that SV-waves are more destructive to underground structures than P-waves, and the responses of underground structures are significantly affected by the incident angles.

Original languageEnglish
Pages (from-to)10-24
Number of pages15
JournalFrontiers of Structural and Civil Engineering
Volume17
Issue number1
DOIs
StatePublished - Jan 2023
Externally publishedYes

Keywords

  • P-SV waves
  • domain reduction method
  • seismic response
  • stiffness matrix method
  • underground structures

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