考虑参数优化的层间隔震结构振动台试验研究  

Shaking table tests on story-isolation structures considering parametric optimization

作　　者：祁皑[1] 郑国琛[1,2] 阎维明[3] 

机构地区：[1]福州大学土木工程学院,福建福州350002 [2]福建省地震局,福建福州350003 [3]北京工业大学工程抗震与结构诊治重点实验室,北京100022

出　　处：《建筑结构学报》2009年第2期8-16,共9页Journal of Building Structures

基　　金：国家自然科学基金资助项目(50378020);福建省科技厅重点项目(2006Y0018);城市与工程安全减灾省部共建教育部重点实验室工程抗震与结构诊治北京市重点实验室开放基金项目(EESR200602)

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。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.

关 键 词：层间隔震 参数优化 振动台试验 隔震层侧移刚度 减震效果 

分 类 号：TU352.12[建筑科学—结构工程] TU317.1