摘要
本文提出了高层隔震结构等大高宽比隔震结构体系地震反应分析的单质点、2质点和3质点剪切型简化计算模型,同时还提出了高宽比影响系数的概念和计算式。这种纯剪切的简化计算模型成功地模拟了剪切加转动多质点计算模型的动力特性,通过高宽比影响系数对剪切型计算模型得到的剪力系数进行非线性放大,使数十质点的隔震结构体系都能够简化成单质点、2质点和3质点体系进行地震反应分析。文末对22层高宽比为5.01的某22层隔震结构进行了算例分析,简化计算理论的计算结果和时程分析法计算结果一致性良好。
The single-mass, 2-mass and 3 mass shear computation models are provided in the paper to analyze the earthquake response for large aspect ratio isolated structure such as high-rise building, and the concept and computation formula of aspect ratio influence coefficient are proposed too. The pure shear model reflects the dynamic properties of MDOF system with shear-rocking model through the non-linear enlarging of shear coefficient by aspect ratio influence coefficient, and nearly all isolated structure system can be simplified into single-mass, 2-mass and 3-mass shear model to analyze the earthquake response. A 22-storied isolated structure with large aspect ratio 5.01 is analyzed with simple method and time history method. The results show that the new simple computation method is precise enough to use in engineering. Its computation is very consistent with the time history method.
出处
《地震工程与工程振动》
CSCD
北大核心
2004年第4期115-121,共7页
Earthquake Engineering and Engineering Dynamics
基金
广州市科技局项目(200309)
关键词
大高宽比隔震结构
剪切型模型
地震反应分析
large aspect ratio isolated structure
shear model
earthquake response analysis
