抗拔型TFPB隔震结构动力特性及地震响应分析

Dynamic Characteristics and Nolinear Seismic Response of the Uplift Resistance TFPB Type Isolation Structure

抗拔型三重摩擦摆隔震支座是一种新型隔震支座。本文以框架结构为例,利用ANSYS软件建立了普通抗震结构和带该支座的基础隔震结构两种模型。通过模态分析,得到了结构的自振周期和振型参与系数;通过地震响应分析,得出结构各层间位移、加速度及剪力幅值,并提取了隔震层和顶层的位移、加速度和剪力时程曲线。结果表明:与抗震结构相比,基础隔震结构周期显著增大;各楼层的加速度幅值、层间剪力、层间位移幅值也相应地得到了控制,具有良好的减震效果。

The uplift resistance type triple friction pendulum bearing is a new type of bearings.Taking frame structure as an example,the models of a common structure and the base isolation structure are established using the software ANSYS.Through modal analysis,the structural self vibration period and vibration mode participation coefficient are obtained;Base on the seismic response analysis,the story drift,acceleration and shear amplitude,and extracting the isolation layer and the top layer of the displacement,acceleration and shear time-history curve are also derived.The results show that： compared with common structure,base isolation structure period increases significantly;the floor acceleration amplitude,shear layers,story drift amplitude are also got control,so the base isolation structure has good damping effect.