带水平伸臂的框—筒结构的抗震性能分析

发布时间：2018-02-10 22:58

本文关键词： 水平伸臂实腹梁空腹桁架斜腹杆桁架侧移抗震性能　出处：《华中科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着经济的发展，我国高层和超高层建筑发展迅速，结构所承受的水平荷载和侧移随着结构高度的增加而增大。在结构中设置水平伸臂是提高结构的抗侧刚度，减小水平侧移的有效方法，在国内外许多高层建筑结构工程中被广泛地采用。带水平伸臂的高层建筑在我国高层设计规范中属于复杂高层建筑结构，，规范中对这类结构的设计条款相对简单。因此研究这类结构的受力变形性能，并提炼出具体的设计概念具有重要的意义。本文在对加强层结构的基本特点、国内外加强层结构的应用现状、对带加强层结构简化模型及抗震减震方面的相关研究工作进行综述的基础上，结合具体的工程算例进行如下研究工作：将采用实体梁、斜腹杆桁架、空腹桁架的水平伸臂构件，分别应用到设置一道和两道加强层的钢筋混凝土高层框-筒结构中，对其采用振型分解反应谱法和时程分析法进行计算分析，研究不同的水平伸臂构件在水平地震荷载作用下的地震响应。将分析计算结果进行对比研究，得出了以下结论： 1.伸臂刚度和数量。采用有限刚度和数量相对较多的水平伸臂，在控制结构水平侧移的同时，能够尽量减小结构内力和刚度突变的负面影响，有利于改善结构的抗震性能。 2.水平伸臂的结构形式。当结构的水平侧移要求严格时，可优先考虑斜腹杆桁架水平伸臂；当结构的水平侧移要求不那么严格，可以从更有利于结构抗震的角度出发，选择空腹桁架水平伸臂；当有限刚度的水平伸臂均无法达到水平侧移控制的要求时，可采用实腹梁水平伸臂形式对结构侧移进行控制。 3.构造措施。在水平伸臂附近，要做好相关的构造加强措施，从而有利于结构的抗震。
[Abstract]:With the development of economy, high-rise and super-high-rise buildings in China are developing rapidly. The horizontal load and lateral displacement of the structure increase with the increase of the height of the structure. The lateral stiffness of the structure is improved by setting the horizontal arm in the structure. The effective method of reducing horizontal lateral displacement is widely used in many high-rise building structures at home and abroad. High-rise buildings with horizontal extension arm belong to complex high-rise building structures in our country's high-rise design code. The design clause of this kind of structure in the code is relatively simple. Therefore, it is of great significance to study the mechanical and deformation properties of this kind of structure and to extract the concrete design concept. In this paper, the basic characteristics of the strengthened story structure, the current situation of the application of the strengthened story structure at home and abroad, the simplified model of the strengthened story structure with the belt and the related research work in the aspect of seismic and seismic absorption are summarized in this paper. Combined with concrete engineering examples, the following research work is carried out: the horizontal extension arm members of solid beam, inclined web truss and empty web truss are applied to the reinforced concrete high-rise frame-tube structure with one or two strengthened floors, respectively. The mode decomposition response spectrum method and time history analysis method are used to calculate and analyze the seismic response of different horizontal arm members under horizontal earthquake load. The results of analysis and calculation are compared and analyzed, and the following conclusions are obtained:. 1. The stiffness and quantity of extension arm. With finite stiffness and relatively large number of horizontal arms, the negative effects of structural internal force and stiffness abrupt change can be minimized while the horizontal lateral displacement of the structure is controlled, which is helpful to improve the seismic performance of the structure. 2. The structural form of horizontal extension arm. When the horizontal lateral displacement of the structure is strict, the horizontal extension arm of the inclined web truss can be given priority; when the horizontal lateral displacement requirement of the structure is not so strict, it can be set out from the point of view which is more favorable to the earthquake resistance of the structure. When the horizontal extension arm of finite stiffness can not meet the requirement of horizontal lateral displacement control, the horizontal extension arm of solid web beam can be used to control the lateral displacement of the structure. 3.Constructional measures. In the vicinity of horizontal extension arm, we should do well the relevant structural strengthening measures, which is beneficial to the seismic resistance of the structure.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.31

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