基于能量概念的剪切型多自由度体系弹塑性地震位移反应分析  

INELASTIC SEISMIC RESPONSE OF LUMPED MASS MDOF SYSTEMS BASED ON ENERGY CONCEPT

作　　者：经杰[1] 叶列平[1] 钱稼茹[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《工程力学》2003年第3期31-37,共7页Engineering Mechanics

基　　金：自然科学重大基金资助项目(59895410)

摘　　要：基于能量概念进行结构动力分析能更清楚的揭示结构抗震性能的本质。介绍了基于能量准则的结构抗震设计概念和有关研究状况。同时根据地震作用下剪切型多自由度结构体系的弹性及弹塑性时程分析结果,研究了能量在楼层间分布的特点,指出了能量集中的现象和原因。并且根据大量分析结果,给出了楼层能量集中的规律及相关因素,并采用等往复振动能量准则建议了能量集中楼层的弹塑性位移计算方法。Structural aseismic characteristics can be explained more clearly by dynamic analysis based on energy concept. The concept of structural aseismic design and research information is introduced. From seismic elastic and inelastic time history analysis of lumped mass MDOF structure systems, the storey energy distributions are analyzed. Energy concentration and its causes are pointed out. Based on the analysis of results, this paper gives the rule of ECS and suggests a method for calculating inelastic displacement of ECS relying on equal cyclic energy criteria of vibration.

关 键 词：剪切型结构 弹塑性位移 能量概念 地震反应 

分 类 号：TU352[建筑科学—结构工程]