摘要
参考我国现行规范设计了3个不同掉层数与掉跨数的山地掉层框架结构(掉两层三跨结构、掉两层两跨结构、掉三层两跨结构)以及1个普通平地框架结构,采用增量动力分析方法(incremental dynamic analysis,IDA),以Park-Ang损伤指数作为结构响应(damage measures,DM)参数,以(peak ground acceleration,PGA)作为地震动强度(intensity measures,IM)参数,考虑余震的附加影响,从构件附加损伤指数、层损伤指数、整体损伤指数方面对掉层框架结构进行了损伤评估。研究结果表明,主震是引起结构损伤最重要的因素。掉层结构上接地层的损伤最严重,随着PGA的增大,掉层结构各构件的附加损伤指数增大,上接地柱的附加损伤最大。山地掉层结构的整体损伤大于普通平地结构的整体损伤;在主震幅值相同时,PGA越大,余震对结构的附加损伤也越大,且余震对掉层结构的附加损伤程度较平地结构更大,山地结构和普通平地结构的损伤指数比按C2K3、C3K2、C2K2、ORD依次减小。
Three structures with different layers and crosses and an ordinary flat frame structure were designed with reference to the current norms of China.Taking the Park-Ang damage index as the parameter of structural response,and peak ground a cceleration(PGA)as the parameter of the ground motion intensity and considering the additional effects of aftershocks,damage assessment of the layered structure was carried out by the incremental dynamic analysis in rspects of the additional damage index,the layer damage index and the overall damage index.The results show that the main shock is the most important factor causing structural damage.The damage of the upper ground layer is the most serious,the additional damage index of the components of the layer structure increases,and the additional damage ofthe upper grounding column is the largest.The global damage of the layered structure on the slop is greater than that of ordinary flat structure,the damage index ratio decreases in turn according to C2 K3、C3 K2、C2 K2 and ORD.
作者
杨佑发
梁婷
谭曦
YANG Youfa;LIANG Ting;TAN Xi(Key Laboratory of New Technology for Construction of Cities in Mountain Area under the Ministry of Education,Chongqing University,Chongqing 400045,P.R.China;College of Civil Engineering,Chongqing University,Chongqing 400045,P.R.China)
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第3期25-36,共12页
Journal of Chongqing University
基金
重庆市建设科技计划项目(2016-07)
国家自然科学基金项目(51638002)~~
