TY - JOUR

T1 - Effects of response spectrum of pulse-like ground motion on stochastic seismic response of tunnel

AU - Chen, Guan

AU - Liu, Yong

AU - Beer, Michael

N1 - Funding Information: This research is supported by the National Natural Science Foundation of China (Grant No. U22A20596 ) and the International Joint Research Platform Seed Fund Program of Wuhan University, China (Grant No. WHUZZJJ202207 ). Guan Chen would like to thank the financial support of Sino-German (CSC-DAAD) Postdoc Scholarship Program .

PY - 2023/8/15

Y1 - 2023/8/15

N2 - It is widely accepted that near-fault pulse-like ground motions potentially cause more severe damage to structures than ordinary ground motions. However, the effects of stochastic pulse-like ground motions on underground structures are not effectively considered. The impacts of response spectra of pulse-like ground motions on seismic response are also unclear. Hence, this study utilizes an underground tunnel to investigate the effects of response spectra of pulse-like ground motions on the stochastic seismic response by combining a pulse-like ground motion simulation method and a finite element method. The combination procedure enables stochastic seismic response analysis under spectrum-compatible pulse-like/ordinary ground motions. The finite element model considers the nonlinear dynamic properties of soil and soil–structure interaction. Monte Carlo simulations are carried out to quantify uncertainties of stochastic tunnel response. Results show that pulse-like ground motions cause larger bending moments for tunnel lining even when they match the same target spectrum of ordinary ground motions. Furthermore, the bending moment of tunnel lining is significantly amplified when the spectral acceleration of pulse-like ground motion contains bulges or multiple peaks in the ranges of 1 s–6 s. Therefore, the seismic risk of tunnels may be significantly underestimated in the near-fault regions without considering pulse-like ground motions and their spectral acceleration characteristics.

AB - It is widely accepted that near-fault pulse-like ground motions potentially cause more severe damage to structures than ordinary ground motions. However, the effects of stochastic pulse-like ground motions on underground structures are not effectively considered. The impacts of response spectra of pulse-like ground motions on seismic response are also unclear. Hence, this study utilizes an underground tunnel to investigate the effects of response spectra of pulse-like ground motions on the stochastic seismic response by combining a pulse-like ground motion simulation method and a finite element method. The combination procedure enables stochastic seismic response analysis under spectrum-compatible pulse-like/ordinary ground motions. The finite element model considers the nonlinear dynamic properties of soil and soil–structure interaction. Monte Carlo simulations are carried out to quantify uncertainties of stochastic tunnel response. Results show that pulse-like ground motions cause larger bending moments for tunnel lining even when they match the same target spectrum of ordinary ground motions. Furthermore, the bending moment of tunnel lining is significantly amplified when the spectral acceleration of pulse-like ground motion contains bulges or multiple peaks in the ranges of 1 s–6 s. Therefore, the seismic risk of tunnels may be significantly underestimated in the near-fault regions without considering pulse-like ground motions and their spectral acceleration characteristics.

KW - Near-fault earthquake

KW - Pulse-like ground motion

KW - Response spectrum

KW - Stochastic seismic response

KW - Tunnel

UR - http://www.scopus.com/inward/record.url?scp=85159226033&partnerID=8YFLogxK

U2 - 10.1016/j.engstruct.2023.116274

DO - 10.1016/j.engstruct.2023.116274

M3 - Article

AN - SCOPUS:85159226033

VL - 289

JO - Engineering structures

JF - Engineering structures

SN - 0141-0296

M1 - 116274

ER -