【摘要】 在既有建筑的基础和上部结构之间增设隔震层,可以减小上部结构的地震反应,从而"间接"地提高建筑物的抗震能力。通过分析了某一建筑物,分别采用铅芯橡胶支座和组合隔震系统时(滑板与橡胶支座的比例分别为1∶6、1∶4和1∶3)的地震反应,并把它们与非隔震时的地震反应进行比较,研究了各种工况的隔震效果,分析了支座比例与减震系数之间的关系。研究结果表明:采用组合隔震系统加固既有建筑,能够减小上部结构的地震反应;而且在支座总数量中滑板支座比例越大,隔震效果越明显。更多还原

【Abstract】 Adding isolation system between the upper structure and foundation of an existing building could reduce the seismic response of the former,accordingly,its seismic capacity could be improved indirectly.In this research,the seismic responses of a building with lead rubber bearing or a combined system(the proportions between the sliding and lead rubber bearings were 1/6,1/4 and 1/3) was respectively analyzed and compared to that of the building without base isolation system to investigate the seismic isolation effect.The relationship between isolation coefficient and the proportion of bearings was studied.The results show that strengthening the existing building with combined system can reduce the seismic response of the upper structure,and that it is more effective if the leading bearing is relatively more.更多还原