竖向隔振建筑振动反应分析研究

Analytical studies on the vibration response of the vertical isolation building

针对地铁隧道存在竖向振动影响其上建筑舒适度的问题,提出一种建筑竖向隔振支座,对支座性能参数进行分析研究,给出支座的竖向压刚度和拉刚度的计算方法,介绍软件中采用橡胶隔震支座单元(ISOLATOR1)和缝单元(GAP)组合模拟支座性能的方法。对布置隔振支座的结构和无隔振支座的普通结构进行竖向振动作用下的非线性时程分析,分析结果表明:组合单元模拟隔振支座的性能是可行的;采用隔振技术后结构顶层竖向加速度能明显减小,提高结构的舒适度。

Based on the problem of the vertical vibration of building on subway tunnel,a kind of vertical vibration isolation bearing is put forward.The performance parameters of isolation bearing are studied,the calculation method of vertical pressure stiffness and vertical tensile stiffness are given,the method of simulating isolation bearings using the combination unit of ISOLATOR1 unit and GAP unit is introduced.The nonlinear time history analysis of the structures with vertical vibration isolation bearing and without vertical vibration isolation bearing is conducted.The analysis results shown that the simulation of using combination unit is feasible,top story vertical acceleration of the structure with vertical vibration isolation bearing can be obviously reduced,so as to improve the building comfort.