摘要
本文基于增量动力分析(IDA)方法,对某既有高层剪力墙住宅的抗震性能进行了研究。通过IDA分析,得到了结构在不同地震动强度下的最大层间位移角分布,通过该结构五个性能水准/极限状态下的位移角限值,得到了结构各极限状态的超越概率曲线和结构在多遇地震、设防地震、罕遇地震作用下达到各极限状态的地震易损性矩阵。结合地震危险性分析,对结构达到各极限状态的损伤风险进行了评估。结果表明,本结构可满足"小震不坏、中震可修、大震不倒"的抗震设防目标,抗震性能良好;基于IDA方法对结构进行地震易损性分析,可给出既有高层建筑结构地震损伤风险的定量评价结果,是既有高层建筑结构抗震性能评估的有效手段。
In this study,the seismic performance assessment of an existing high-rise shear-wall residential building is conducted based on incremental dynamic analysis(IDA).Through IDA analysis,the distribution of the maximum drift of the structure under various intensities of ground motion is obtained.Then,based on the limits of maximum drift of five limit states,the seismic fragility curves for each limit state are derived,and the seismic fragility matrix of the structure under frequent earthquake,design based earthquake and maximum considered earthquake is formulated.Furthermore,based on seismic hazard analysis,the damage risk of the structure reaching each limit state is assessed.The analysis result indicate that the structure satisfies the performance objectivity of"undamaged under frequent earthquake,repairable under design based earthquake,no collapsing under maximum considered earthquake";the risk of collapse in 50 years is inferior to the acceptable risk limit defined by researchers in US and Europe,which shows that the structure has satisfactory seismic performance.This study shows that IDA method can give quantified result of the damage risk of high-rise structures under seismic action,thus is an effective method in seismic performance assessment of high-rise structures.
作者
崔明哲
王翠坤
陈才华
潘玉华
熊羽豪
任重翠
Cui Mingzhe;Wang Cuikun;Chen Caihua;Pan Yuhua;Xiong Yuhao;Ren Chongcui(China Academy of Building Research,Beijing 100013,China)
出处
《建筑科学》
CSCD
北大核心
2021年第9期151-157,共7页
Building Science
基金
住房和城乡建设部科学技术计划项目(项目编号2021-K-022)。
关键词
增量动力分析
高层剪力墙结构
地震易损性
损伤风险
抗震性能评估
incremental dynamic analysis
high-rise shear-wall structure
seismic fragility
damage risk
seismic performance assessment
