带混合暗支撑钢筋混凝土核心筒的弹塑性性能分析

发布时间：2018-08-08 16:07

【摘要】：在目前我国的高层及超高层建筑结构中,钢筋混凝土核心筒作为抗侧力构件已被广泛采用。而带混合暗支撑钢筋混凝土核心筒作为一种新型的核心筒构造方案,对其的研究还十分匮乏,工程应用也很不成熟。因此,对带混合暗支撑钢筋混凝土核心筒进行研究分析,准确了解其弹塑性性能,不仅有利于高层建筑设计理论发展,还具有十分重要的工程意义。本文借助有限元分析软件ABAQUS对带混合暗支撑钢筋混凝土核心筒进行弹塑性分析,以求准确掌握其弹塑性性能。文章主要研究内容如下:(1)对ABAQUS有限元分析的基本理论进行了简要介绍,包括钢筋混凝土有限元模型的建立方式、钢筋和混凝土材料的本构关系以及有限单元类型的选择等内容。接下来,利用ABAQUS建立了一个钢筋混凝土核心筒有限元模型,并对其进行了数值模拟分析,将模拟结果与试验数据进行对比,以验证ABAQUS建模分析的有效性。(2)通过ABAQUS对普通钢筋混凝土核心筒和带混合暗支撑钢筋混凝土核心筒进行动力弹塑性分析和静力弹塑性分析,对两种核心筒的弹塑性性能进行比较。并在此基础上进一步对带混合暗支撑钢筋混凝土核心筒进行参数分析,研究连梁跨高比、角柱含钢率以及墙肢斜撑布置形式等因素对带混合暗支撑钢筋混凝土核心筒弹塑性性能的影响。(3)介绍了增量动力分析(IDA)的基本概念及基本原理。以EI-Centro波为例,对带混合暗支撑钢筋混凝土核心筒进行了单记录IDA分析,详细说明了IDA分析的实施步骤,并分析了带混合暗支撑钢筋混凝土核心筒在不同强度地震作用下的抗震性能。最后,对带混合暗支撑钢筋混凝土核心筒进行了10条地震记录的IDA分析,并对结构进行了地震易损性分析以评估在不同强度地震作用下结构超越各极限状态的概率。
[Abstract]:At present, the reinforced concrete core tube is widely used as a lateral force resistant member in high-rise and super high-rise building structures in our country. However, as a new type of core tube construction scheme, the research on the reinforced concrete core tube with mixed concealed bracing is still very scarce, and the engineering application is not mature. Therefore, it is not only beneficial to the development of the design theory of high-rise buildings, but also of great engineering significance to study and analyze the reinforced concrete core tube with mixed hidden braces and accurately understand its elastic-plastic properties. In this paper, the elastic-plastic analysis of the reinforced concrete core tube with mixed hidden braces is carried out with the help of the finite element analysis software ABAQUS, in order to accurately master its elastoplastic properties. The main contents of this paper are as follows: (1) the basic theory of ABAQUS finite element analysis is briefly introduced, including the way of establishing the finite element model of reinforced concrete, the constitutive relation between steel bar and concrete material, and the choice of finite element type. Then, a finite element model of reinforced concrete core tube is established by using ABAQUS, and the numerical simulation analysis is carried out, and the simulation results are compared with the experimental data. In order to verify the validity of ABAQUS modeling and analysis. (2) the dynamic elastic-plastic analysis and static elastic-plastic analysis of the ordinary reinforced concrete core tube and the reinforced concrete core tube with mixed dark braced are carried out by ABAQUS, and the elastoplastic properties of the two kinds of core tubes are compared. On the basis of this, the parameter analysis of reinforced concrete core tube with mixed dark bracing is carried out, and the ratio of span to height of beam is studied. The influence of angle column steel content and inclined brace arrangement on the elastoplastic properties of reinforced concrete core tube with mixed concealed braces is discussed. (3) the basic concept and principle of incremental dynamic analysis (IDA) are introduced. Taking the EI-Centro wave as an example, a single recorded IDA analysis of the reinforced concrete core tube with mixed dark braces is carried out, and the implementation steps of the IDA analysis are explained in detail. The seismic behavior of reinforced concrete core tube with mixed dark braced under different earthquake intensity is analyzed. Finally, the IDA analysis of 10 seismic records of reinforced concrete core tube with mixed hidden braces is carried out, and the seismic vulnerability analysis of the structure is carried out to evaluate the probability of the structure exceeding the limit states under the action of different intensity earthquakes.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU973.17

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