强震下K型偏心支撑钢框架滞回能需求层间分布  

The hysteretic energy demand distribution through the height of K-type eccentrically braced steel frames under severe earthquakes

作　　者：丁蕾[1] 顾强[1] 

机构地区：[1]苏州科技学院土木工程学院,江苏苏州215011

出　　处：《苏州科技学院学报（工程技术版）》2014年第2期25-31,共7页Journal of Suzhou University of Science and Technology （Engineering and Technology）

基　　金：国家自然科学基金项目(51278320)

摘　　要：选用10条远场和10条近场地震波对K型偏心支撑钢框架进行了非线性动力时程分析,探索了远场与近场地震下结构滞回能层间分布规律。研究表明,K型偏心支撑钢框架的主要耗能区域分布在耗能梁段;近场地震对结构滞回能需求及滞回能层间分布有较大影响,对各构件耗散的滞回能占总滞回耗能的比值也有很大影响。根据非线性时程分析结果,提出了K型偏心支撑钢框架滞回能层间分布系数的简化计算公式。Inelastic dynamic time-history analysis of K-type eccentrically braced steel frames（EBSF） were carried out using 10 far-fauh earthquake ground motions （EQGM） and 10 near-fault EQGM, in order to analyze the hys- teretic energy demand distribution through the height .It is found that link beam is the predominated energy dis- sipated region of K-type EBSF. Near-fault EQGM have large influence on the hysteretic energy , distribution , and the hysteretic energy ratio of component to structure. A simplified calculation formula of story weight factor of the hysteric energy is proposed for K-type EBSF by the results.

关 键 词：K型偏心支撑钢框架 滞回能 层间分布系数 近场地震 

分 类 号：TU391[建筑科学—结构工程]