【摘要】 为了分析滚轴隔震结构在地震作用下的动力响应,在滑移隔震研究的基础上,针对滚轴纯滚动运动特点,推导出了滚轴隔震结构的动力方程.对某一工程实例采用滚轴隔震的方法,进行了在El-Centro地震波作用下的数值模拟仿真,并分析了隔震结构的峰值加速度、相对位移、基底位移和基底残余位移等.结果表明:滚轴隔震能有效地减缓上部结构在强震时的响应.当滚动摩阻系数大于0.15 cm时可以不施加限位装置,滚动摩阻系数越小,上部结构的加速度和层间位移越小,进一步减缓上部结构“鞭梢效应”的效果越明显.更多还原

【Abstract】 The seismic responses of multi-storey shear type buildings isolated by rolling rods were studied.Through taking the characteristics of pure rolling into account based on the sliding isolation,the equation of rolling isolation was proposed.The responses of the rolling isolation structure were compared with the corresponding fixed base structure in order to investigate the effectiveness of the rolling rods.The results demonstrate that the method of rolling rods is effective in reducing the response of the super-structure against strong earthquake excitation.When the rolling friction coefficient is great than 0.15 cm,the limited device can be cancelled.The effectiveness of the rolling rods in reducing the seismic response of the structure decreases with an increase in the rolling friction coefficient.In addition,the storey-shift and whip-tip effect of the upper-structure become unremarkable with decreasing the rolling friction coefficient.更多还原