大高宽比隔震结构双向输入振动台试验及数值分析  

Shaking Table Test and Numerical Analysis for Large Aspect Ratio Isolated Structure Under Bi-directionai Earthquake Input

作　　者：刘文光[1] 何文福[2] 霍达[2] 付伟庆[3] 

机构地区：[1]哈尔滨工业大学深圳研究生院 [2]北京工业大学建筑工程学院,北京100022 [3]黑龙江大学建筑工程学院,哈尔滨150090

出　　处：《北京工业大学学报》2007年第6期597-602,612,共7页Journal of Beijing University of Technology

基　　金：国家自然科学基金(50578045);广东省科技厅资助项目(200482801001;2006837201002).

摘　　要：对高宽比为5的钢框架隔震结构模型,采用不同的地震波进行了水平向和竖向双向地震输入的振动台试验,利用时程分析法完成了模型结构地震反应的数值分析．结果表明,大高宽比隔震结构在水平向和竖向双向输入情况下的减震效果良好．在8度和9度地震作用下,试验观测到隔震层竖向进入了非线性受拉状态,测得支座最大拉应力3．176 MPa,隔震结构未出现倾覆．试验还发现,竖向输入地震动对隔震结构水平向地震反应的影响很小．对高宽比小于5的隔震结构进行水平向地震反应分析时,可忽略竖向地震对结构反应的影响．The shaking table tests are completed on a steel frame model with aspect ratio of 5 with horizontal and vertical earthquake input of different earthquake waves in this paper, and the numercial analysis of earthquake response to model structure is also performed by time history analysis method. The experiment results show that the large aspect ratio isolated structure has good isolation effect under the earthquake in two directions. Under the action of strong earthquake waves, we found that the isolation layer occured tension stress, the maximum tension stress was 3. 176 MPa, however, the model structure did not overturn. We also found that the vertical earthquake input had small influence on earthquake response to isolated structure in horizontal direction. It is proposed that the influence on earthquake response to vertical earthquake input can be ignored when we analyze the earthquake response in horizontal direction for a isolated structure with aspect ratio of less than 5.

关 键 词：隔震结构 双向振动台试验 地震反应 

分 类 号：TU352.1[建筑科学—结构工程]