竖向刚度对偏心辊轴摩擦摆隔震系统性能影响研究  

Disturbance from Vertical Oscillation to Seismic Isolation Behavior of ERFPS System

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,河北唐山063009 [2]北京工业大学,北京100022

出　　处：《建筑科学》2011年第1期29-32,共4页Building Science

基　　金：国家自然科学基金资助项目(50778061);河北理工大学科学研究基金z200711

摘　　要：根据多体动力学相对动能定理推求了偏心辊轴摩擦摆隔震系统动力反应分析计算公式,并考虑了竖向刚度的影响。分析与计算结果表明:设置偏心辊轴摩擦摆系统之后,结构地震动力反应的层间位移大幅减少。当辊轴截面偏心距为20～30mm、滚动摩擦系数为0.01左右时,隔震系统具有较好的消能效果与复位能力。当竖向层间刚度系数为水平层间刚度系数的10倍以上时,可以不考虑竖向刚度对水平方向隔震效果的影响。A theoretical analyzing approach about a novel seismic isolation system,ERFPS（Eccentric Rolling Friction Pendulum System）,is derived.It starts from the relative kinematics energy theorem in multiply-body dynamics,including the effect of inter-storey rigidity coefficient in the vertical direction.Computation results show that ERFPS has three kinds of necessary capability required for an effective isolation system.When the eccentricity is in the range of 20 ～ 30mm and the rolling friction coefficient is about 0.01,the ERFPS system possesses both good energy dissipation and good reposition capability.If the vertical inter-storey rigidity coefficient is above 10 times greater than the horizontal inter-storey rigidity coefficient,for a practical range of rolling frictional coefficient the influence of vertical rigidity could be neglected.

关 键 词：滚动摩擦 上盘 动能定理 非线性微分方程 龙格—库塔方法 

分 类 号：TU352.12[建筑科学—结构工程] TU311.3