摘要
建立了多级串联非比例阻尼隔震结构动力分析模型;引用分区瑞利阻尼模型将非比例阻尼矩阵分解为瑞利阻尼矩阵和体现非比例阻尼的余项阻尼矩阵,推导出结构的阻尼矩阵;并编制了MATLAB动力时程分析程序,对一实际隔震工程进行地震响应分析。结果表明:随着下部结构刚度的增加,结构的层剪力比和隔震层位移响应峰值均趋向于基础隔震结构的对应值;当下部结构为一层,且层间刚度大于上部结构底层层间刚度4～6倍时,可以近似按基础隔震结构进行动力分析。
The dynamic analysis model of multistage series non-proportion damping isolated structure is established.Citing partition of Rayleigh damping model,the non-proportional damping matrix of isolated structure is decomposed into the Rayleigh damping matrix and the surplus damping matrix reflecting non-proportional damping,and the damping matrix of multistage series non-proportion damping isolated structure is derived.Using the MATLAB software,the seismic respone analysis for a real structure is done.The results show that structure layer shear ration of the overall structure and peak displacement of isolation layer tend to correspond to value of base isolation as the lower structural mass and stiffness increased,when substructure has one layer and stiffness greater than 4 to 6 times of the upper structure stiffness of ground floor,it can approximately analyze as base isolation structure.
出处
《西北地震学报》
CSCD
北大核心
2012年第4期319-323,共5页
Northwestern Seismological Journal
基金
国家自然科学基金(50978130,51178211)
关键词
非比例阻尼
基础隔震
串联隔震
分区瑞利阻尼
地震响应分析
Non-proportion damping
Base isolation
Series isolation
Partition Rayleigh damping
Earthquake response analysis
