不同类型串联隔震体系竖向承载力对比分析  

Comparative analysis of vertical load bearing capacity of different serial seismic isolation system

作　　者：杜永峰[1,2] 韩登[2] 

机构地区：[1]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [2]兰州理工大学防震减灾研究所,甘肃兰州730050

出　　处：《土木工程学报》2010年第S1期249-254,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(50778087);甘肃省科技支撑计划(090-GKCA040)

摘　　要：取叠层橡胶支座隔震结构与地下室柱所组成的串联隔震结构为研究对象,对比独立柱串联隔震和独立柱加柱顶连梁串联隔震体系竖向承载性能。采用ABAQUS非线性有限元软件建立1个独立柱串联隔震体系和3种具有不同梁柱线刚度比的独立柱加连梁的串联隔震体系有限元模型,并在不同初始水平力作用下进行竖向单调加载试验的数值模拟。定量对比分析串联隔震体系竖向承载力-位移曲线随不同水平力初始值、不同梁柱线刚度比的变化规律,分析这两个主要因素对串联隔震体系竖向极限承载力及结构体系破坏形式的影响。结果表明:在地下室柱顶增加连梁,串联隔震体系竖向承载力的极限值与梁柱线刚度比值成正比,而与水平力初始值的大小成反比,但竖向承载力极限值增加的幅度与水平力初始值的大小成正比,但竖向承载力极限值增加的幅度与水平力初始值的大小成正比。Taking the serial seismic isolation system,which consists of laminated rubber bearing mounted on top of basement column,as the investigated subject,the vertical load bearing capacity of serial isolation system with independent column are compared with that of the serial isolation system with link beam on top of basement column.1 FEM model of serial isolation system with independent column and 3 models of serial isolation system with link beam of different beam-column linear stiffness ratios are established using nonlinear FEM Software ABAQUS,and a monotonic loading test of the serial isolation system is numerically simulated combined with horizontal loading of different initial values.The vertical-horizontal loading curve of serial isolation system are quantitatively compared for different initial values of horizontal load and different values of beam-column linear stiffness ratios,and the effect of these two factors on the ultimate vertical loading and on the damage pattern of serial isolation system are investigated.The result shows that the increase of vertical load bearing capacity of serial isolation system is directly proportional to beam-column linear stiffness ratios,and is inversely proportional to initial value of horizontal load.However,the relative degree of increase of vertical load bearing capacity is roughly proportional to initial value of horizontal load.However,the relative degree of increase of vertical load bearing capacity is roughly proportional to initial value of horizontal load.

关 键 词：隔震 串联隔震体系 有限单元法 叠层橡胶支座 数值模拟 

分 类 号：TU352.12[建筑科学—结构工程]