摩擦摆地下室顶板与基础顶面隔震对比

Comparative Study on Isolation of Basement Roof and Top Surface of Foundation Base Friction Pendulum

从理论上分析FPS摩擦摆支座的隔震性能,根据拉格朗日方程建立FPS隔震系统在地震作用下的离散多自由度体系运动方程。计算和分析结果表明:FPS的隔震效果相对比较明显,其结构的层间位移、楼层位移、楼层速度及加速度大幅度减小;同时,分析结果也表明:在FPS摩擦摆地下室顶板隔震与基础顶面隔震的对比研究中,基础顶面隔震的效果更加突出。选取适当的滑道半径和接触面摩擦系数的数值,隔震效果可达90%左右。

Isolation Performances of FPS friction pendulum bearings were analyzed theoretically,equations of motion discrete multi-degree of freedom system under earthquake action established FPS isolation system according to Lagrange Equation.Calculation and analysis results show,FPS isolation effect is relatively obvious.The structure of set up FPS drastically reduced it's inter-storey drift,storey drift,storey velocity and storey acceleration.At the same analysis also shows,in FPS friction pendulum basement roof isolation and top of the base isolation contrast study,isolation effect of foundation top face is more prominent.Selecting the appropriate values of the radius and the slide contact surface friction coefficient,isolation effects can reach about 90%.