加层减震结构振动台试验分析  

Research on shaking table test for structures with added story and seismic response decrease

作　　者：郑国琛[1] 祁皑[1] 阎维明[2] 

机构地区：[1]福州大学土木工程学院,福建福州350002 [2]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100022

出　　处：《地震工程与工程振动》2007年第2期164-170,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50378020);福建省科技计划重点项目(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：本文针对一加层减震模型结构对隔震层上下部频率比进行优化设计,对隔震层采用侧移刚度偏小值、优化值和偏大值的加层减震模型结构进行地震模拟振动台试验。试验结果表明,经过参数优化设计的加层减震模型结构有明显减震效果,在试验中使设防水准提高了一级,由直接加层的局部破坏到加层减震后的大震不坏;对于一般的加层减震结构,采用以最大限度地降低既有结构的层间位移为优化目标是合理的,具有普遍的工程意义。Frequency ratio of structural elements above the isolation layer to those below the isolation layer was optimized. In the shaking table tests, the lateral stiffness of isolation layer was with lower, optimized, or excessive value. The results showed that the optimization can significantly reduce the seismic responses and raise one grade of the earthguake fortification level in the tests, from partial failure to no damage in strong motions. For such structures, significantly reducing story drift is an appropriate goal of optimality and it has general significance in engineering.

关 键 词：加层减震 频率比 侧移刚度 绝对加速度 层间位移 减震效果 

分 类 号：P315.966[天文地球—地震学]