岩土工程学报2024，Vol.46Issue(8)：1622-1631,10.DOI:10.11779/CJGE20230397
基于IDA方法的综合管廊纵向地震易损性分析研究
Longitudinal seismic fragility analysis of utility tunnel structures based on IDA method
摘要
Abstract
This study aims to propose a fragility analysis method for evaluating the longitudinal seismic performance of long-line utility tunnels based on nonlinear incremental dynamic analysis(IDA).To this end,a simplified beam-spring model is established,to reasonably consider the mechanical properties of the joint and the soil-tunnel interaction.A series of 17 sets of ground motion records are selected and uniformly scaled to different intensity levels as the input of one-dimension free filed analyses to obtain the ground motions at the bottom slab of a utility tunnel.Finally,the seismic analysis of the utility tunnel considering wave passage effects is conducted.Based on the IDA results,the optimal intensity measure is selected.With the damage measure of the peak joint opening,the fragility curves of the utility tunnel are established using the peak velocity at the bottom slab of the tunnel and the peak velocity at the ground surface as the intensity measures,respectively.The failure probability of the utility tunnel under different earthquake intensity levels is also obtained.The proposed fragility curves and failure probability of the utility tunnel in typical site II can provide an effective tool to estimate the seismic performance of this type of underground structures and a reliable basis for predicting damage under different earthquake intensity levels.关键词
综合管廊/梁-弹簧模型/增量动力分析/易损性分析/失效概率Key words
utility tunnel/beam-spring model/incremental dynamic analysis/fragility analysis/failure probability分类
建筑与水利引用本文复制引用
李锦强,钟紫蓝,申家旭,张卜,张亚波,杜修力..基于IDA方法的综合管廊纵向地震易损性分析研究[J].岩土工程学报,2024,46(8):1622-1631,10.基金项目
国家自然科学基金面上项目(52378470 （）
51978020) （）
中国博士后科学基金项目(2021M700311) （2021M700311）
国家重点研发计划项目(2022YFC3003603) （2022YFC3003603）
