华北水利水电大学学报（自然科学版）2025，Vol.46Issue(4)：92-102,11.DOI:10.19760/j.ncwu.zk.2025061
基于易损性的渡槽结构系统抗震韧性评价
Seismic Resilience Assessment of Aqueduct Structural System Based on Fragility
摘要
Abstract
[Objective]To explore the seismic resilience of aqueduct structures,this study develops a finite element analysis model for a beam-type aqueduct from the South-to-North Water Diversion Project based on OpenSees.Taking into account the uncertainties associated with ground motions and structural parameters,seismic vulnerability analysis is conducted on key components,such as double-column piers,elastomeric bearings at the cap beam,and polytetrafluoroethylene sliding bearings at the abutments.[Methods]The conditional marginal product method was employed to construct seismic vulnerability curves for the aqueduct structural system.The seismic resilience of the aqueduct structural system and its components was quantified.[Results]The aqueduct structural system,assessed using the improved conditional marginal product method,ex-hibited lower resilience compared to individual components.Among components,bearings demonstrated poorer seismic per-formance and higher vulnerability than piers.The double-column piers showed the highest resilience,followed by the elasto-meric bearings at the cap beam,while the structural system exhibited the lowest resilience.Evaluating the seismic resilience of the structural system solely based on piers could overestimate the seismic resilience by up to 66.8％.Seismic performance analysis revealed that when peak ground acceleration(PGA)was within the range of 0.2g-0.6g,the seismic resilience of the aqueduct structural system declined significantly.When the PGA exceeded 0.4g,the seismic resilience of the aqueduct structure dropped below 0.6,indicating weak seismic performance.[Conclusion]Special attention should be paid to the seismic safety of aqueduct structures in regions with the seismic fortification intensity above 8 degrees.关键词
渡槽/结构系统/构件/抗震韧性/地震易损性Key words
aqueduct/structural system/components/seismic resilience/seismic fragility分类
建筑与水利引用本文复制引用
张天宇,李嘉博,黄海燕,马颖,刘成清..基于易损性的渡槽结构系统抗震韧性评价[J].华北水利水电大学学报（自然科学版）,2025,46(4):92-102,11.基金项目
国家自然科学基金项目(52478563) （52478563）
云南水利水电职业学院基金项目(2025YSZSYS002) （2025YSZSYS002）
中国地震局建筑物破坏机理与防御重点实验室开放基金项目(FZ211102). （FZ211102）
