圆弧滑道双辊轴摩擦摆隔震系统的研究  

RESEARCH ABOUT ROLLING FRICTION PENDULUM EARTHQUAKE ISOLATING SYSTEM ON CIRCULAR SLIDE

作　　者：葛楠[1] 苏幼坡[1] 王兴国[1] 周锡元[2] 

机构地区：[1]河北理工大学建筑工程学院,河北唐山063009 [2]北京工业大学建筑工程学院,北京100124

出　　处：《工程力学》2009年第6期158-165,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(50078003)

摘　　要：根据动能定理及滚动摩擦耗能原理推求了一种圆弧滑道双辊轴摩擦摆隔震系统动力反应分析计算公式。辊轴放置在具有内凹圆弧曲线形状的上盘、下盘滑道中间,与滑道之间为非协调接触,形成辊轴式摩擦摆。分析与计算结果表明:这种摩擦摆具有隔震系统所必需特性。较长的自振周期使其具有必要的隔离能力;依靠结构重力可以使其复位;依靠滚动摩擦的作用,可以消耗传入上部结构的地震能量。设置辊轴摩擦隔震系统之后,能大幅减少结构地震动力反应的层间位移。适当地选取圆弧滑道半径与滚动摩擦系数值,隔震效果可达90%左右。当圆弧滑道半径为2m―3m、滚动摩擦系数小于0.01时,隔震系统具有较好的消能效果与复位能力。A theoretical analyzing approach about a class of seismic isolation systems, RFPS （Rolling Friction Pendulum System）, is presented. It starts from the relative kinematics energy theorem in multiply body dynamics. This system consists of two rollers placed in the vicinity of two circular concave curve slides to form the non-indented contacts. Computational results shows that it has the essential capabilities required for an effective isolation system. The rather long vibration period provides the necessary isolation capability, the gravity provides the reposition capability, and the rolling friction acting at the contacting surface on the top and bottom plate respectively, provides the energy dissipation capability. The inter-storey drift resulting from seismic action could be drastically decreased on buildings equipped with a RFPS system. If an optimum combination of slide radius and a rolling friction coefficient is adopted, the seismic isolation effect could be as high as 90%. When the slide radius is in the range of 2m-3m and the rolling friction coefficient less than 0.01, the RFPS system posses good energy dissipation and reposition capability.

关 键 词：隔震 辊轴摩擦摆 滚动摩擦 地震响应 龙格-库塔方法 

分 类 号：TU352.12[建筑科学—结构工程] TU973.213