西南交通大学学报2025，Vol.60Issue(5)：1121-1130,10.DOI:10.3969/j.issn.0258-2724.20230597
黄土地层浅埋地铁车站结构地震易损性分析
Seismic Fragility Analysis of Shallow-Buried Subway Station Structure in Loess Strata
摘要
Abstract
In order to study the seismic fragility of subway stations situated in loess sites,a typical two-story three-span subway station structure in a loess area was chosen as a representative example,and incremental dynamic analysis(IDA)was conducted on the subway station structure by using the ground motion input method based on viscoelastic boundaries.The results of IDA were then used to comprehensively evaluate 37 seismic intensity indices in terms of their effectiveness,practicality,and benefit.Based on this evaluation,seismic intensity indices that were suitable for the site conditions and structural configuration of the subway station were selected.Seismic fragility curves and damage state probability curves for the subway station structure were established using a double-parameter lognormal distribution model.These curves facilitated the determination of the probability of the subway station structure exceeding various performance levels and encountering different damage states under specific seismic intensities.The findings suggest that acceleration-related and velocity-related indices are more suitable as seismic intensity indices for predicting the seismic response of underground structures,while displacement-related and ratio-related indices are not appropriate.Under frequent seismic events,the probability of the subway station structure experiencing damage is relatively low.For design-level seismic events,the structure primarily sustains slight damage.In the case of rare seismic events,the subway station structure is more prone to slight and moderate damage.The results provide a reference for the seismic design of performance-based subway stations constructed on loess strata.关键词
地铁车站/抗震性能/地震动强度参数/增量动力分析/易损性分析Key words
subway station/seismic performance/seismic intensity parameter/incremental dynamic analysis/fragility analysis分类
建筑与水利引用本文复制引用
孙纬宇,朱辉,严松宏,梁庆国,张建哲,杨斌,张戎令..黄土地层浅埋地铁车站结构地震易损性分析[J].西南交通大学学报,2025,60(5):1121-1130,10.基金项目
国家自然科学基金项目(52208392,52068044,52168058) （52208392,52068044,52168058）
中国博士后科学基金项目(2021M693843) （2021M693843）
甘肃省自然科学基金项目(21JR7RA309) （21JR7RA309）
中国国家铁路集团有限公司科技计划开发计划(K2021G025) 兰州交通大学天佑青年人才托举工程项目(1520260306)的资助. （K2021G025）
