高层黏滞阻尼减震结构最小地震剪力系数分析研究  

Analytical studies on the minimum shear-weight ratio of structure with viscous dampers

作　　者：周丽芳[1] 邓雪松[1] 周云[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《地震工程与工程振动》2013年第6期206-214,共9页Earthquake Engineering and Engineering Dynamics

基　　金：广东省自然学科基金团队项目(8351009101000001);广州市高校"羊城学者"首席科学家项目(10A026S);广东省教育部产学研项目(20090912);广州市教育系统创新学术团队项目(穗教科[2009]11号)

摘　　要：采用ETABS软件对高层钢框架-混凝土核心筒黏滞阻尼减震结构进行多遇地震作用下的时程反应分析,研究了不同阻尼力比和不同高度结构的减震性能,通过与规范反应谱值对比,探讨了消能减震结构剪重比降低的可行性。以一工程为例,采用PERFORM-3D软件分析了结构在罕遇地震作用下的减震性能。研究结果表明:黏滞阻尼减震结构可对建筑物在地震作用中的反应进行有效控制,提高了结构的安全性能,但是同时会使结构的楼层剪力减小,使结构的剪重比达不到规范的要求,但其安全性能比规范要求提高更多;阻尼力比r至少为0.1时,才能降低减震结构的剪重比限值的要求。The software of ETABS was used to study the time history analysis of structure with viscous dampers un- der frequent earthquake. The performance of vibration reduction under different damping force ratios and different structure heights was investigated. By comparison with response spectrum values of code, the feasibility of reducing the shear-weight ratio was studied. The performance of vibration reduction of a structure was studied by utilizing the PERFORM-3 D software in rare earthquake. The results show that the earthquake response of the structure with vis- cous dampers could obviously controlled, and the structure seismic behavior could be obviously improved. At the same time we make the shear of the structure decrease, so that the shear-weight ratio of structure does not meet the requirement of the code, but its safety performance is better than the seismic code requirements. When the damping force ratio is at least 0.1, we may lower the shear-weight ratio limit.

关 键 词：地震剪力系数 阻尼力比 消能减震 黏滞阻尼器 地震反应 

分 类 号：TU352.1[建筑科学—结构工程]