岩土工程学报2026，Vol.48Issue(9)：1805-1814,10.DOI:10.11779/CJGE20250601
近断层与远场地震动作用下跨海峡盾构隧道纵向地震响应特性
Longitudinal seismic response of cross-strait shield tunnels under near-fault and far-field seismic waves
摘要
Abstract
Near-fault pulse-like ground motions with long-period velocity pulses may cause severe damage to subsea shield tunnel structures.However,the longitudinal seismic response analysis of such tunnels poses significant computational challenges due to large spatial scales,densely assembled segmental linings with numerous bolts,and strongly nonlinear soil-structure interaction,rendering refined longitudinal models low computationally feasibility.To address this,a dynamic substructure approach based on the response displacement method is developed for the 2.7 km-long Su'ai submarine shield tunnel.Near-fault pulse-like and far-field ground motions are employed to investigate the differences in longitudinal seismic response,and an optimal intensity measure is identified to characterize the tunnel's longitudinal damage potential.Results indicate that near-fault ground motions,characterized by significant velocity pulse effects,induce substantially more severe seismic responses compared to far-field excitations.The structural longitudinal response demonstrates increased sensitivity to low-frequency seismic waves,with distinct spatial distributions of seismic stress:peak stresses concentrate at the tunnel haunch under near-fault motions,whereas they shift to the abutment under far-field conditions.Root-mean-square velocity(RMSV)is recommended as the optimal parameter for characterizing the structural damage potential of subsea shield tunnels.关键词
海底盾构隧道/近断层脉冲地震动/动力子结构法/纵向地震反应/地震动强度指标Key words
submarine shield tunnels/near-fault pulse-like ground motions/dynamic substructure method/longitudinal seismic response/seismic intensity measure分类
建筑与水利引用本文复制引用
赵凯,罗昊,李孝雄,穆腾飞,康雨翔,左熹,陈国兴..近断层与远场地震动作用下跨海峡盾构隧道纵向地震响应特性[J].岩土工程学报,2026,48(9):1805-1814,10.基金项目
国家自然科学基金项目(52378347,52478527) （52378347,52478527）
安徽省教育厅高校科研项目(2025AHGXZK40035).This work was supported by the National Natural Science Foundation of China(Grant Nos.52378347,52478527)and the University Scientific Research Project of the Department of Education of Anhui Province(Grant No.2025AHGXZK40035). （2025AHGXZK40035）
