土柱模型在高层建筑土与结构相互作用分析中的应用

发布时间：2018-04-25 14:19

本文选题：土与结构相互作用 + 土柱模型　；参考：《哈尔滨工业大学》2013年硕士论文

【摘要】：高层建筑抗震设计是当今学者研究的重点问题。现在一般的设计方法仅考虑了地基基础刚性假设，忽略了地基土对高层建筑地震响应的影响。根据已有的研究成果和灾害调查报告显示，，地基土的存在改变了结构的动力特性，基于地基基础刚性假设的设计方法不再被认为是偏于保守的设计方法，因此在高层建筑抗震设计时应考虑土与结构相互作用对结构地震响应的影响。由于场地土的类别和结构形式较多，本文将针对广东省具有代表性的场地土和高层框架结构进行土与结构相互作用分析。本文具体包含以下几方面的研究内容：将桥梁抗震分析中应用的土柱模型用于高层建筑与地基土相互作用分析中，土柱模型由质点、梁单元和阻尼单元三部分组成，地基土的阻尼和水平剪切刚度由土柱模型模拟。使用美国南加州大学开发的EERA程序计算土体的等效线性剪切模量和等效线性阻尼。计算土柱模型的所有的参数，并且在ABAQUS中建立土柱模型，使用土柱模型模拟基础周围的土体。通过对分析结果进行对比，认为土柱模型能够较好的反应土与结构之间的相互作用。建立土柱模型-桩基础-高层框架结构的三维分析模型。为了使结构能够更加接近实际工程概况，结构模型采用三维模型，并使用具有典型性的框架结构作为上部结构的分析对象。采用动力时程分析方法研究在罕遇地震作用下，土与结构相互作用对高层建筑地震响应分析结果的影响。研究12层简易框架和12层复杂框架的分析结果，考虑土与结构相互作用，能够使结构的地震响应分析结果出现局部放大的情况。使用Python语言，对ABAQUS后处理进行二次开发。针对结构的位移、层间位移角和楼层剪力，编写了自动计算的程序，提高了模型处理数据的效率。
[Abstract]:Seismic design of high-rise buildings is one of the most important problems studied by scholars. At present, the general design method only considers the assumption of foundation rigidity and neglects the influence of foundation soil on the seismic response of high-rise buildings. According to the existing research results and disaster investigation reports, the existence of foundation soil has changed the dynamic characteristics of the structure, and the design method based on the rigid assumption of foundation foundation is no longer considered conservative design method. Therefore, the interaction between soil and structure should be taken into account in the seismic design of high-rise buildings. Because there are many types and structural forms of site soil, this paper will analyze the soil-structure interaction of representative site soil and high-rise frame structure in Guangdong Province. This paper contains the following aspects of the research: The soil-column model used in seismic analysis of bridges is used to analyze the interaction between high-rise buildings and soil-soil. The soil-column model consists of three parts: particle, beam element and damping element. The damping and horizontal shear stiffness of foundation soil are simulated by soil-column model. The equivalent linear shear modulus and equivalent linear damping of soil are calculated by using the EERA program developed by the University of Southern California. All the parameters of the soil column model are calculated, and the soil column model is established in ABAQUS, and the soil around the foundation is simulated by the soil column model. By comparing the analysis results, it is concluded that the soil column model can better reflect the interaction between soil and structure. A three-dimensional analysis model of soil column model-pile foundation-high-rise frame structure is established. In order to make the structure more close to the actual engineering situation, the structural model adopts the three-dimensional model, and uses the typical frame structure as the analysis object of the superstructure. The influence of soil-structure interaction on the seismic response of high-rise buildings under rare earthquakes is studied by using dynamic time-history analysis method. The analysis results of 12 story simple frame and 12 story complex frame are studied. Considering the interaction between soil and structure, the results of seismic response analysis of the structure can be partially enlarged. Using Python language, the second development of ABAQUS post-processing is carried out. According to the displacement of the structure, the displacement angle of the floor and the shear force of the floor, the program of automatic calculation is compiled, which improves the efficiency of the model processing data.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.31

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