【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。更多还原

【Abstract】 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.更多还原