不同加载模式下不对称结构静力弹塑性分析  

Static nonlinear analysis of asymmetric structures under different load patterns

作　　者：李刚[1] 刘永[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2004年第3期350-355,共6页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(50008003;59895410).

摘　　要：选取6种具有代表性的加载模式,采用ETABS软件,对5种不对称钢框架及钢筋混凝土框架结构进行了pushover分析,分析了加载模式、结构不对称性、层数和振型等因素对pushover分析结果的影响.结果表明,对于刚度有突变的不对称结构,不同加载模式的结果差别明显,并且这种差别随着结构刚度突变的增强、周期的增大、层数的增高而越来越大.Selecting an appropriate load pattern is very important in the pushover analysis. Five types of the asymmetric steel and the reinforced concrete frames are studied by the pushover analysis under six different load patterns using ETABS program, and the effects of load patterns, structural asymmetry, storey numbers and higher vibration modes on the results of the pushover analysis are discussed. The results show that the results of the pushover analysis of the asymmetric structures with weak stiffness storey are different under different load patterns, and the difference will increase with the increase of the structural fundamental period, storey number and the severity of the weak stiffness storey.

关 键 词：加载模式 不对称结构 静力弹塑性分析 PUSHOVER分析 抗震设计 

分 类 号：TU352.1[建筑科学—结构工程] TU313