近场地震作用下框架结构的损伤机理  

Damage mechanism of frame structures under action of near-field earthquake

作　　者：易伟建[1] 张冰[1] 

机构地区：[1]湖南大学湖南省工程结构损伤诊断重点实验室,湖南长沙410082

出　　处：《自然灾害学报》2007年第2期112-117,共6页Journal of Natural Disasters

基　　金：国家自然科学基金资助项目(50678064);湖南省科技计划重点资助项目(06FJ3003)

摘　　要：首先讨论了近场地面运动的特征及各种抗震规范对近场地震的设防,然后采用非线性时程分析方法,对一个10层框架结构在近场地震作用下的响应特性进行了研究。同时对该框架结构进行了Pushover分析,通过与非线性时程分析结果进行对比,说明Pushover分析方法不能正确评估结构在近场地震作用下的抗震性能。The characteristics of near-field ground motions and the fortification against near-field earthquake in seismic codes are discussed firstly. Then with the method of nonlinear time history analysis, the characteristic of a tenstory concrete frame under near-field grounds motions is studied. Meanwhile the seismic response of the ten-story concrete frame is obtained by using pushover analysis. Comparing with the results of nonlinear time history analysis, it is illustrated that the method of pushover analysis can not accurately evaluate the seismic performance of structures subjected to near-field grounds motions.

关 键 词：近场地震 框架结构 非线性时程分析 PUSHOVER分析 

分 类 号：TU313[建筑科学—结构工程]