地震作用下不同混凝土柱端叠层橡胶支座的应力和变形分析  

ANALYSIS OF STRESS AND DEFORMATION OF LAMINATED RUBBER BEARING CONNECTED WITH THE RC COLUMNS UNDER EARTHQUAKE

作　　者：杜永峰[1,2] 吴忠铁[1] 范萍萍[3] 

机构地区：[1]兰州理工大学防震减灾研究所,兰州730050 [2]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,兰州730050 [3]兰州工业高等专科学校,兰州730050

出　　处：《工业建筑》2012年第3期39-42,共4页Industrial Construction

基　　金：国家自然科学基金项目(50778087;50978130)

摘　　要：近年来,在基础隔震中将叠层橡胶垫放置于地下室混凝土柱顶的串联隔震形式被大量应用,这样有利于地下空间利用,然而,在地震作用下,叠层橡胶支座既承受竖向重力荷载又承受水平和竖向地震作用,同时还受下端约束的影响,在这种情况下,叠层橡胶支座的受力与变形必然受到影响。针对这个问题,对三种串联隔震体系进行了有限元模拟。对比计算结果表明,混凝土柱刚度对于叠层橡胶支座的应力和变形影响较为明显,刚度越大叠层橡胶支座下端转角越小,达到塑性应力时位移越大。Recently, the serial isolation system, i.e. the laminated rubber bearing is on the top of RC columns the basement, is widely applied in the base isolation building, it helps to underground space utilization. However, in the earthquake, the performance of laminated rubber bearings is affected by vertical gravity load and both horizontal and vertical seismic force and lower constraint, In this case, the stress and the deformation of laminated rubber bearings is affected and remains to be analyzed. Three models of serial isolation system are analyzed for this problem on the paper. Compared with the results, it indicates that the stiffness of RC column has the great influence in the stress and the deformation of laminated rubber bearing. With the increasing of stiffness the corner of the bottom of the laminated rubber bearings is smaller and the displacement is larger when the plastic stress occuts.

关 键 词：基础隔震 叠层橡胶垫 串联隔震体系 应力 变形 

分 类 号：TU352.12[建筑科学—结构工程]