某广场建筑地基—基

发布时间：2018-01-11 19:16

本文关键词：某广场建筑地基—基础—上部结构共同作用分析研究　出处：《浙江大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着社会经济的发展,人们生活水平的不断提高,越来愈多的高层建筑、超高高层建筑在我国大地上兴起。在目前的建筑结构设计中,常常把上部结构看成是柱端固接于基础上的独立结构,这种传统的设计方法不考虑上部结构与地基和基础共同作用的影响,计算结果与实际有较大的出入,尤其是在高层建筑中,不合理的现象更加明显。因为高层建筑的上部结构、同下部的基础、地基是一个有机整体,三者相互联系、相互影响,因此,在建筑结构设计中,三者共同作用的影响是不容忽视的。本文总结了国内外在上部结构与地基基础共同作用分析方面的研究方法和成果,首先,论述了共同作用的作用机理,分析上部结构、基础、地基的刚度形成及产生的影响,从理论上阐述了上部结构-基础-地基相互作用体系的计算分析模型与分析方法；然后以实际工程项目——余姚国际广场5#楼为研究对象,基于大型有限元程序MIDAS/GEN,根据地质勘察资料和桩基静载荷试验,通过模拟桩(土)弹簧刚度的迭代,达到位移协调共同作用的目的。本文研究内容及结论如下：(1)通过桩基土弹簧的模拟,大大简化了有限元分析的难度和复杂性,为实际工程的建筑结构设计考虑上下部共同作用开辟了一个有效的途径；(2)通过对考虑地基一基础一上部结构共同作用模型的分析,以及同建立在刚性地基上模型的比较,得出了上部结构有关的内力变化规律；(3)对考虑地基和基础共同作用后的上部结构进行了动力特性分析,得出地基一基础一上部结构共同作用(与刚性地基上的结构相比)使得结构动力特性发生改变的一些规律,即自振周期延长,振型发生改变；在水平力作用下,结构侧向位移加大,结构内力发生变化等。因此,对软土地基上的高层建筑,在概念设计和结构计算中如若考虑共同作用的影响,将使得结构设计更加安全、合理、经济。
[Abstract]:With the development of social economy, people's living standards continue to improve, more and more high-rise buildings, super high-rise buildings rise in our country. In the current building structure design, often the superstructure as a separate structure is fixedly connected with the base on the column, this traditional method does not consider the influence of common effect of upper structure and foundation, the results were different from the actual, especially in high-rise buildings, the unreasonable phenomenon is more obvious. Because the upper structure of the high-rise building, with the lower part of the foundation, the foundation is an organic whole, the three mutual connection, mutual influence, therefore, in the building structure in the design, the interaction of the three can not be ignored.
This paper summarizes the interaction of superstructure and foundation at home and abroad research methods and achievements of the first, discusses the mechanism of interaction of superstructure, foundation, analysis, foundation stiffness and influence the formation of the theory expounded the upper structure foundation soil interaction system analysis model and analysis method; then based on the actual project - 5# floor International Plaza in Yuyao as the research object, the finite element program based on MIDAS/GEN, according to the geological exploration data and pile static load test, through the simulation of the pile (soil) iterative stiffness of the spring, to reach the common role of displacement coordination purposes. The contents and results of this paper are as follows: (1) simulated by pile foundation soil spring, has greatly reduced the difficulty and complexity of finite element analysis, for building structure engineering design considering the interaction between the upper and lower An effective way; (2) through the analysis of the foundation considering soil structure interaction model, and compared with the model established on the rigid foundation, the internal force variation of the upper structure; (3) to consider the interaction of superstructure, foundation and foundation of dynamic characteristics analysis, get the foundation foundation superstructure interaction (compared with the rigid foundation's structure) some rules of the structure dynamic characteristics change, the natural period was prolonged and the mode change; under horizontal force, lateral displacement increases, the internal force of the structure changes.
Therefore, if we consider the influence of the joint action in the conceptual design and structural calculation of high-rise buildings on soft soil foundation, we will make the structural design safer, more reasonable and economical.

【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU470

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