【作者】 王彬；

【导师】 丁海平；

【作者基本信息】 中国地震局工程力学研究所 ， 防灾减灾工程及防护工程， 2004， 硕士

【摘要】 近几十年来，基础隔震技术逐渐被重视，并且得到了广泛的应用。但是在传统的理论分析中，对于基础隔震结构往往忽视土-结相互作用对其隔震效果的影响。本文针对这一问题，对一叠层橡胶基础隔震建筑在考虑土-结相互作用下的响应情况进行了计算、分析，得到了一些有益的结果。具体工作如下： 1．对土-结相互作用的发展历史及其计算方法，基础隔震技术在国内外的发展情况进行了简要地概括总结，提出了存在的问题和本文重点研究工作。 2．简述了改进的有限元软件ANSYS的功能以及运用它进行基础隔震体系的土-结动力相互作用分析时，各单元的选择和模拟的方法。 3．对一栋7层框架基础隔震体系在不同的地震大小和不同场地条件下，进行了考虑土-结构相互作用和不考虑相互作用分析和比较，发现：考虑土-结构相互作用后各楼层的位移幅值比不考虑土-结相互作用均有大幅的提高，而层间位移幅值明显减小。 4．对基础固定和基础隔震结构在二类场地条件下的地震响应情况，进行了比较、分析，发现基础隔震体系能使上部结构的反应大大降低，有效地降低了地震作用。 最后，对全文的研究工作进行了总结，并讨论了今后进一步需要的研究工作。更多还原

【Abstract】 AbstractIn recent years, base isolation technology attracted more concentration gradually and have been wildly used in the world .However, in the traditional theory analysis, influence on base isolation property of the soil-structure interaction was seldom considered for the base isolation structure. This paper focus on this point , calculating and analyzing response of a structure with laminated rubber bearings, considered soil-structure interaction, and provide some beneficial results. The details are as follows:1. The development of soil-structure interaction and calculating methods ,as well as the evolution of base isolation technology in the world are summarized briefly in the paper. Furthermore , some existed limitation and emphases of this research work are presented .2. The basic functions of the upswing FEM software-’ANSYS’ and the methods to select and simulate element in the analysis of soil-structure dynamic interaction of a base isolation construction are introduced.3. Some analysis and comparison are done under different earthquake intensity ,various site condition and whether or not considering soil-structure interaction for a 7 storied framed base- isolated structure .And we find that , the displacement amplitude of each story increase greatly compared with the case in which the soil-structure interaction is not considered, but relative displacement amplitude reduce obviously.4. The seismic responses of fixed base and base isolated structure in the case of grade 2 site are compared and analyzed, it’s found that the base isolated system reduced the response of superstructure greatly, that is to say, the system is effective to resist earthquake.At last, the research work are generalized and the problems which need further study in the future are discussed.更多还原