河北工业科技2023，Vol.40Issue(6)：452-461,10.DOI:10.7535/hbgykj.2023yx06007
基于材料性能劣化的RC框架结构抗震性能评估及易损性分析
Seismic performance evaluation and vulnerability analysis of RC frame structures based on material properties degradation
摘要
Abstract
In order to improve the service life of reinforced concrete(RC)frame structures,a finite element analysis model of RC frame structures considering material degradation was established to clarify the influence degree of material degradation on seismic performance and vulnerability of RC frame structures after long-term service.Four scenarios based on the deteriorations of material performance at 100％,90％,80％,and 70％(denoted as flsc-100,flsc-90,flsc-80,and flsc-70,respectively)were selected seismic performance.Simultaneously,seismic fragility curves were plotted to analyze the vulnerability of the structure under different levels of seismic intensity.The results show that:1)The seismic performance of RC frame structures under different seismic waves decreases obviously with the increase of the deterioration degree of materials.Under rare earthquake action,the interlayer displacement angle of flsc-70 increases by 80％ compared with flsc-100.2)With the decrease of structural stiffness and bearing capacity,the exceedance probability of RC frame structures under different failure states is significantly increased.The exceedance probability of serious damage in flsc-90,flsc-80 and flsc-70 increased by 75％,300％ and 975％,respectively,compared with flsc-100.Therefore,it is necessary to consider the effect of material degradation in the seismic performance evaluation of existing structures.The research results can help predict the damage degree of RC frame structures with deteriorating material properties during earthquake,and provide a reference for structural reinforcement and repair.关键词
混凝土与钢筋混凝土结构/材料性能劣化/抗震性能/增量动力分析/易损性Key words
concrete and reinforced concrete structures/material properties deterioration/seismic performance/incremental dynamic analysis/vulnerability分类
建筑与水利引用本文复制引用
刘志辉,佟振禹,刘晓丹,李勇,于海丰..基于材料性能劣化的RC框架结构抗震性能评估及易损性分析[J].河北工业科技,2023,40(6):452-461,10.基金项目
河北省自然科学基金(E2021208010,E2023208069) （E2021208010,E2023208069）
石家庄市科学技术研究与发展计划项目(216160147A) （216160147A）
中央引导地方科技发展资金项目(236Z5408G) （236Z5408G）
