东南大学学报（自然科学版）2024，Vol.54Issue(2)：432-440,9.DOI:10.3969/j.issn.1001-0505.2024.02.021
基于矢量IMs的浅埋偏压黄土隧道地震易损性
Seismic fragility of shallowly buried bias loess tunnels based on vector-valued intensity measures
摘要
Abstract
To quantitatively evaluate the seismic fragility of shallowly buried bias loess tunnels from a probabi-listic perspective,a large number of nonlinear dynamic time calculations were performed on the finite element model of soil-structure interaction using wave methods based on viscoelastic boundaries and incremental dy-namic analysis.Twenty ground motion intensity measures(IMs)were evaluated,and then fragility assess-ments based on scalar-valued IM and vector-valued IMs were subsequently conducted,respectively.The re-sults show that the peak ground velocity(efficiency index ξ=0.15)is the most suitable IM,followed by the velocity spectral intensity(ξ=0.20)and the peak spectral velocity(ξ=0.22).Compared with the scalar-valued IM,the vector-valued IMs are better fitted and can reduce the dispersion of structural damage predic-tion.The effect of the correlation between two IMs needs to be considered to determine the effective range of the established seismic fragility surfaces.Using the scalar-valued IM underestimates or overestimates the ac-tual damage probability of the tunnel.The seismic fragility of tunnels can be evaluated more accurately based on the vector-valued IMs.关键词
偏压隧道/增量动力分析/地震易损性/地震动强度参数/易损性曲面Key words
bias tunnel/incremental dynamic analysis/seismic fragility/ground motion intensity measures(IMs)/fragility surface分类
建筑与水利引用本文复制引用
林峻岑,孙纬宇,李国玉,严松宏,佟浩..基于矢量IMs的浅埋偏压黄土隧道地震易损性[J].东南大学学报（自然科学版）,2024,54(2):432-440,9.基金项目
国家自然科学基金资助项目(52208392,52068044)、中国博士后科学基金资助项目(2021M693843)、甘肃省自然科学基金资助项目(21RJ7RA309). （52208392,52068044）
