橡胶垫基础隔震结构考虑竖向地震作用高宽比限制研究  

RESEARCH ON THE LIMIT RATIO OF HEIGHT TO WIDTH FOR BASE-ISOLATED STRUCTURE WITH THE RUBBER BEARINGS CONSIDERING THE VERTICAL EARTHQUAKE ACTION

作　　者：谷伟[1] 刘斌[1] 

机构地区：[1]东北大学资源与土木工程学院,沈阳110004

出　　处：《工业建筑》2004年第10期17-20,共4页Industrial Construction

基　　金：国家自然科学基金资助项目 ( 4 0 0 72 0 0 6) ;东北大学博士论文资助项目 ( 2 0 0 2 12 )

摘　　要：采用多质点层间剪切型分析模型 ,建立了橡胶垫基础隔震结构在水平与竖向地震联合作用下的运动微分方程 ,并推导了隔震结构高宽比限值的简化计算公式。在考虑了场地条件、地震烈度等影响因素下 ,分析了竖向地震作用的存在对隔震结构高宽比限值的影响规律。研究表明 ,在硬土场地上 ,竖向地震作用的存在对隔震结构高宽比限值有较大影响 ,并随着地震烈度、竖向加速度峰值的增大而增大。建在高烈度设防区较硬土场地上的基础隔震结构 。Through interlaminar shear model with the multi-degree of freedom,the equation of motion was established for base-isolated structure with the rubber bearings,considering the earthquake action in horizontal and vertical directions.The simplified formula for the calculation of the limit ratio of height to width was derived.The influence of vertical earthquake action on the limit ratio was analyzed,in consideration of the factors such as sites and earthquake intensity.The research shows that the influence of vertical earthquake action on the limit ratio of height to width is large in rigid site,which can be increased with an increase in seismic intensity and the peak value of the vertical acceleration.So,the influence of vertical earthquake action on the limit ratio of height to width for base-isolated structure is not ignored in high earthquake intensity zone and rigid site.

关 键 词：竖向地震作用 基础隔震结构 高宽比限值 橡胶垫 地上 设防 地震烈度 加速度峰值 场地条件 影响规律 

分 类 号：TU352.1[建筑科学—结构工程]