【摘要】 为了研究隔震层在不同位置的层间隔震结构减震效果,验证层间隔震结构参数优化理论,建立了不同隔震层位置的层间隔震结构模型,优化了隔震层上下部频率比,对隔震层采用侧移刚度偏小值、优化值和偏大值的层间隔震结构模型进行地震动模拟振动台试验。试验结果表明,层间隔震技术能有效地降低结构地震反应,减震效果随着隔震层位置的升高而逐渐降低;经过参数优化设计的层间减震体系能在最大限度地降低隔震层下部结构层间位移反应的同时,有效地控制隔震层上部结构绝对加速度反应;同时研究表明,在实际工程中,进行理论计算的优化侧移刚度值和由橡胶隔震支座的类型和数量决定的实际优化侧移刚度值存在一定的误差是允许的。更多还原

【Abstract】 In order to study the isolating effect of structure with isolation layer in different positions,verify the parameter optimization theory of isolation structure,the structural model with isolation layer in different positions is established.The frequency ratio of isolation layer upper-lower parts is optimized.Shaking table tests are performed on the model of story-isolation structures with lower,optimized and upper lateral stiffness of isolation layer.The results show that the story-isolation structures can greatly reduce seismic response,and the isolating effect shows better as the degradation of the isolation layer;the optimized story-isolation structural model can significantly reduce the displacement of the layers lower than the isolation layer while control absolute acceleration in upper stories.It is shown that some errors are allowed in practice for stiffness values using the theoretical optimization and by practical analysis based on types and quantities of rubber isolators.更多还原