考虑桩土相互作用对剪力墙结构抗震性能影响的弹性分析

发布时间：2018-03-27 04:52

本文选题：桩土相互作用　切入点：剪力墙结构　出处：《长安大学》2015年硕士论文

【摘要】：目前的抗震设计规范中,采用以刚性地基为前提的抗震设计方法。地震作用下,地基、基础与上部结构之间实际存在的动力相互作用使得结构的地震响应与刚性地基假设时有较大差异。近年来,国内外对上部结构与地基基础动力相互作用这一课题进行了大量研究,但是由于这一问题的复杂性,研究者们的侧重点不尽相同,对于地震作用下的动力相互作用需要更深入的分析和研究。剪力墙结构作为一种重要的高层建筑结构形式近年来在国内得到广泛采用。为了克服因不良地质条件造成剪力墙结构在抗震和沉降等方面不能满足工程要求等情况,剪力墙结构的基础形式通常被设计成桩筏基础。本文建立了地基土-桩筏-剪力墙结构系统的三维整体有限元模型,通过模态分析考察了桩土相互作用对剪力墙结构动力特性的影响;通过动力时程分析考察了多遇地震作用下桩土相互作用对剪力墙结构的抗震性能的影响。通过变化模型中地基土弹性模量、桩长、桩径等因素,分析了不同因素对桩土相互作用下剪力墙结构的动力特性和抗震性能的影响规律。
[Abstract]:In the current seismic design code, the seismic design method based on rigid foundation is adopted. The actual dynamic interaction between the foundation and the superstructure makes the seismic response of the structure quite different from the assumption of the rigid foundation. There has been a lot of research on the dynamic interaction between superstructure and foundation at home and abroad. However, due to the complexity of this problem, the emphasis of the researchers is not the same. As an important structural form of high-rise building, shear wall structure has been widely used in China in recent years. In order to overcome the bad geological conditions, shear wall structure needs more in-depth analysis and study. Causing shear wall structures to fail to meet engineering requirements in such aspects as earthquake resistance and settlement, The foundation form of shear wall structure is usually designed as pile-raft foundation. In this paper, a three-dimensional integral finite element model of soil-pile-raft shear wall structure system is established. The influence of pile-soil interaction on the dynamic characteristics of shear wall structures is investigated by modal analysis. The influence of pile-soil interaction on the seismic behavior of shear wall structures is investigated by dynamic time-history analysis. The influence of different factors on the dynamic and seismic behavior of shear wall structures under pile-soil interaction is analyzed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU435;TU398.2

【参考文献】