钢框架-剪力墙模型结构振动台试验与损伤分析  

Shaking Table Tests and Damage Analysis of a Steel Frame-Shear Wall Model Structure

作　　者：徐龙河[1] 单旭[1] 吕杨[2] 李忠献[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]天津大学建筑工程学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2013年第12期1127-1132,共6页Journal of Tianjin University：Science and Technology

基　　金：国家优秀青年科学基金资助项目(51322806);国家自然科学基金面上项目(51178034);高等学校学科创新引智计划项目(B13002)

摘　　要：对一个1∶4缩尺的3层钢框架-剪力墙模型结构进行振动台试验研究,分析了该结构在强震作用下的动力特性、动力响应及损伤的演化规律.结果表明,随着地震强度增大,结构前两阶自振频率以及层动力放大系数逐渐减小,结构位移反应增大.提出了基于构件层次的损伤模型,该模型考虑了大变形幅值对累积耗能的影响.用该损伤准则对模型薄弱层钢柱的损伤演化规律进行分析,结合IDA分析的结果以及试验结果,对模型的合理性进行了验证.A series of shaking table tests were conducted on a 1 ： 4 scaled 3-story steel frame-shear wall model struc- ture, and the dynamic characteristics, dynamic response and damage evolution of the steel frame structure under strong earthquakes were analyzed in this paper. Results indicated that with the increase of earthquake intensity, the first two natural frequencies and the layer dynamic magnification factors decreased, and the displacement responses increased. An improved two-parameter damage model for component, which considers the effect of hysteretic defor- mation amplitude on accumulative damage energy dissipation, was suggested. Structural damage evolution analysis of the weak story was made using this damage model, which was proved to be reasonable and effective with the combined consideration of IDA results and shaking table test results.

关 键 词：钢框架 振动台试验 损伤模型 损伤演化 

分 类 号：TU352[建筑科学—结构工程]