URTFPB高层隔震建筑地震响应分析

摘要

竖向抗拔型摩擦摆支座(URTFPB)是一种新型减震消能支座.介绍了该支座的工作机理及力学模型.以框剪高层隔震建筑为例,利用Midas Gen软件建立了基础隔震结构计算模型,提取了隔震支座的竖向位移、竖向轴力、隔震建筑沿弱轴方向的水平加速度及各楼层的最大加速度包络值.结果表明:由于隔震周期的延长,框剪摩擦摆基础隔震结构减小了地震作用能量的输入,从而有效地降低了结构的地震加速度响应;新型竖向抗拔型摩擦摆支座有效地提高了隔震层的竖向抗拔能力,解决了高层隔震建筑的倾覆问题.%Vertical uplift resistance type friction pendulum bearing (URTFPB) is a new type of shock absorber.The working mechanism and mechanical model of the absorber are introduced.Then taking a high-rise isolated building with a shear-frame structure as an example,based on the case study of Midas Gen software,this paper establishes base isolation structure model.The vertical displacement and the vertical axial force of the FPB and the URTFPB are extracted.The horizontal acceleration response along the weak axis of the building and the envelope value of maximum acceleration of each floor are analyzed.The results show that friction pendulum foundation isolation structure with frame-shear reduces the seismic energy input due to the extension of the isolation period,so as to effectively reduce the earthquake acceleration response of the structure.The new bearing can effectively improve the vertical uplift capacity,so the overturning problem of the building is solved.