土木工程与管理学报2025，Vol.42Issue(1)：11-19,33,10.DOI:10.13579/j.cnki.2095-0985.2025.20240109
考虑余震影响的双层高架桥框架式桥墩易损性分析
Fragility Analysis of Framed Piers of Double-deck Viaduct Considering the Effect of Aftershocks
摘要
Abstract
In order to investigate the seismic performance of the frame-type piers of double-deck ele-vated bridges under the mainshock-aftershock effect,based on quasi-static tests of the frame-type piers of double-deck elevated bridges,a numerical model of the piers was established using the OpenSees platform.The simulation results were compared with the experimental results to validate the feasibility of the model.Eighty-one real mainshock-aftershock sequences from 12 earthquake events were selected from the Pacific Earthquake Engineering Research(PEER)database.Based on the In-cremental Dynamic Analysis(IDA)method,a fragility analysis was conducted on frame-type bridge piers,considering the effects of different aftershock intensities(ΔPGA).The results indicate that,compared to the mainshock,the increase in aftershock intensity has a relatively small impact on addi-tional damage to the structure,with the mainshock being the primary cause of structural failure.As the mainshock damage to the structure increases,the cumulative damage of the structure under after-shocks also increases,and the impact of aftershocks on structural damage becomes significant when PGAMS reaches 0.4g.In the range of ΔPGA=0.4-1.0,the probability of the structure exceeding vari-ous damage limit values due to aftershocks is higher than that affected only by the mainshock.The av-erage increase in the maximum probability of exceedance ranges from 1.60%to 21.81%.关键词
双层高架桥框架式桥墩/主余震/抗震性能/余震强度/易损性分析Key words
double-deck viaduct frame pier/mainshock-aftershock/seismic performance/aftershock intensity/fragility analysis分类
交通工程引用本文复制引用
许成祥,石晗晨..考虑余震影响的双层高架桥框架式桥墩易损性分析[J].土木工程与管理学报,2025,42(1):11-19,33,10.基金项目
国家自然科学基金(51478048) （51478048）
