【作者】 谢一可；

【导师】 叶献国；

【作者基本信息】 合肥工业大学 ， 结构工程， 2006， 硕士

【摘要】 目前在基础隔震结构的研究中,较多学者对基础隔震结构进行二维建模,并假设上部结构为弹性,仅允许隔震支座进入塑性阶段。本文针对这一问题,建立了有隔震和无隔震的四层框架结构的分析模型:均采用三维建模,上部结构构件使用弹塑性杆系模型,基础隔震结构的隔震支座采用一种基于力—位移关系的LRB模型。通过对结构进行地震能量反应分析,研究基础隔震结构的能量耗散情况、上部结构的弹塑性变形情况、上部结构和隔震支座在强震中的相互关系以及探讨了基础隔震结构在强震中的安全性和经济价值。 隔震支座在强地震中一般会有较大的水平位移,这就有可能与邻近构造物发生碰撞,导致上部结构的地震反应高于预期值。本文用理想的弹簧模型模拟碰撞过程,分析了基础隔震结构在经过碰撞过程后,隔震是否依然有效;并且定义了碰撞影响指标Q,结合地震反应结果分别从研究了碰撞刚度、地震波强度、上部结构刚度、临近构造物与基础隔震结构的距离(小于隔震支座的最大水平位移)、隔震支座五个方面研究了碰撞对基础隔震结构的影响作用。更多还原

【Abstract】 In current research of base-isolated structure, lots of researchers use 2D model to analyze the structure and assume that superstructure keep elastic stage in earthquake and just isolators can into plastic stage. According to the question, four-floors frame construction models are built in the cases of having isolating components and no isolating components: all the structure use 3D models, members of superstructure use elasto linkage models, isolators of base-isolated structure use a force-displacement relation based LRB model. By way of energy response analysis of the structure, the paper discusses the energy dissipation of base-isolated structure, elastic-plastic deformation of superstructure, the relation of superstructure and isolators in earthquake and investigate the security and economic value of base-isolated structure.Generally speaking, the displacement of isolator is comparatively large, so the base-isolated structure may impact with the adjacent structures, result that the energy response of superstructure higher than expectation value. The paper use ideal elastic model to simulate the impaction course. Discussed whether the isolation can protects the structure when in impact with the adjacent structures. A influence index about the impact effect is also defined in the paper. According to the index and the earthquake response of the base-isolated structure, the different effects of the impaction stiffness, superstructure stiffness, the bearing, the distance between the structure and adjacent structures and seismic wave are discussed.更多还原