中间层减震结构地震影响实例分析  

Analysis of Earthquake Impacts on the Mid-story Vibration Reduction of Structures

作　　者：白举科[1] 陈龙珠[1] 赵荣欣[2] 

机构地区：[1]上海交通大学船建学院安全与防灾工程研究所 [2]上海市建筑科学研究院,上海200030

出　　处：《工程抗震与加固改造》2007年第3期54-58,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金资助项目(50478022)

摘　　要：用直接积分方法得到了减震支座在结构中不同位置时的结构动力特性和地震反应,分析了减震支座位置变化对结构输入地震作用和动力反应的影响。实例计算结果表明,减震支座对其上下部分的隔震与减震并不是总起作用;刚度恒定与刚度折减情况相比,支座层最大位移变化规律有显著不同;无支座层的一般楼层层间最大侧移总是比普通结构小。Direct integration Algorithm is applied to obtain the dynamic properties and seismic responses of structures with bearings above different stories. The effects, which are caused by variation of situations of vibration-reducing bearings, on the seismic actions and dynamic responses of the structures are also analyzed. Calculated results of the examples indicate that the vibration-reducing bears do not always isolate the upper part or reduce the vibration of the lower parts. Compared the constant stiffness structures to reduced stiffness ones, we find that the varying law of the maximum displacements of the bearings are quite different from each other and the maximum displacements of the stories without bearings are always less than that of the ordinary structure.

关 键 词：中间层减震 叠层橡胶支座 基底隔震 

分 类 号：TU352.1[建筑科学—结构工程]