框支剪力墙耗能减震结构的地震反应分析

Seismic Response Analysis on Frame-Supported Shear-Wall Structures and Their Effects of Energy Dissipation and Seismic Mitigation

对于底部框架部分侧向刚度小,上部剪力墙部分侧向刚度大的框支剪力墙结构,提出在结构底部框架部分安装粘滞阻尼器的方法进行耗能减震控制,提高其抗震性能.运用大型有限元结构分析软件SAP2000建立了1栋21层框支剪力墙结构模型,对其进行了纯底部框架结构、普通落地剪力墙结构和安装耗能阻尼器状态下结构的地震时程分析.结果表明,耗能阻尼器能够有效地降低整个结构的地震反应,地震时输入结构的大部分能量由安装于底部的阻尼器耗散,从而保护了主体结构,耗能减震效果明显.

As for frame-supported shear-wall structures, which have a character that the lateral stiffness of the frame part is so small compared with shear-wall part, so the energy dissipation and seismic mitigation method is proposed to solve the problem, aiming at improving the seismic behavior of these structures. 21-story models of frame-supported shear-wall structure are erected with finite element analysis software SAP2000,for the three models of pure frame substructure, ordinary fall-to-ground shear-wall struc- ture and build-in viscous dampers structure a seismic time history analysis is conducted. The results show that the viscous damper can efficiently reduce the seismic response of the structure ,in the proceeding of the earthquake , and that most energy imported in the structure is dissipated by dampers, so the main structure is protected. The effects of energy dissipation and seismic mitigation are quite obvious.