岩土工程学报2025，Vol.47Issue(11)：2355-2365,11.DOI:10.11779/CJGE20240966
考虑同震位移的隧道地震动力响应分析
Seismic dynamic response analysis for tunnels considering coseismic displacement
摘要
Abstract
Fault dislocation is a form of dynamic impact load that induces permanent deformation of the stratum in the vicinity of the fault.Based on the finite-fault source and crustal velocity model,coseismic displacement is computed according to the layered dislocation theory.Then,this paper presents a fling-step effect ground motion expression considering the pulse period,peak displacement and permanent displacement.According to the fling-step effect ground motion expression,the coseismic displacement field is transformed into a dynamic displacement process,and the seismic response of tunnels considering permanent displacement is analyzed.Taking the 2022 Menyuan earthquake as an example,the deformation and damage characteristics of the Daliang tunnel are analyzed,validating the rationality of the proposed method.Additionally,the impacts of pulse period and peak displacement of near-fault ground motions on seismic response analysis of crossing fault tunnel are investigated:shorter pulse periods correspond to larger unidirectional velocity pulse amplitudes,resulting in more pronounced impact effects of fault slip and more severe tunnel damage;at constant pulse period,higher peak displacements result in more severe tunnel damage,and the impact of displacement rebound on structural damage is not negligible;the destructive effect of peak displacements on tunnels is more pronounced compared to pulse periods of ground motions.关键词
隧道工程/断层错动/地震动模拟/数值模拟/同震位移Key words
tunnel engineering/fault dislocation/ground motion simulation/numerical simulation/coseismic displacement分类
土木建筑引用本文复制引用
冯俊,赵伯明,王子珺..考虑同震位移的隧道地震动力响应分析[J].岩土工程学报,2025,47(11):2355-2365,11.基金项目
国家自然科学基金项目(52272341,U1434210) （52272341,U1434210）
国家重点研发计划项目(2022YFB2302101)This work was supported by National Natural Science Foundation of China(Grant Nos.52272341,U1434210),and National Key Research and Development Program of China(Grant No.2022YFB2302101). （2022YFB2302101）
