摘要
云南省昆明博物馆新馆位于高烈度区,采用铅芯橡胶隔震支座及普通橡胶隔震支座混合基础隔震体系。采用大型有限元分析软件etabs v9.5.0对其建立了基础隔震结构及其相应的非隔震结构的三维实体模型,采用非线性时程分析法对此模型进行了两个水平向地震作用的分析,讨论了隔震结构在多遇地震和罕遇地震下的隔震性能。分析结果表明,基础隔震结构能够满足高烈度区罕遇地震作用下的抗震需求,且基础隔震结构的水平地震响应明显低于非隔震结构,表现出良好的减震效果。在地震易发区,采用基础隔震结构是一个性价比较高的方法。
Kunming Museum New House,which is located in high seismic fortification intensity region,is base isolated with both lead rubber bearings(LRB) and rubber bearings(RB).The three-dimensional finite-element model of base-isolated structure and corresponding fixed-base structure were modeled.On the basis of the models,comparative analyses of two components of real horizontal ground motions by nonlinear time-history method were conducted and isolation performance of base-isolated buildings under basic intensity earthquake and rare intensity earthquake were discussed.It is shown that base-isolated structure can resist the high-level earthquake under high seismic fortification intensity region,and the response of base-isolated structure is obviously less than that of the fix-based structure,which indicates that the base-isolated structure has good isolation effect.Base isolation is a cost-effectiveness method in seismic prone areas.
出处
《结构工程师》
2010年第5期79-84,共6页
Structural Engineers
