基于三维有限元法的多层钢—混凝土组合框架地震响应分析

发布时间：2018-04-28 11:28

本文选题：钢-混凝土组合结构 + ABAQUS　；参考：《中南大学》2013年硕士论文

【摘要】：国内外对钢-混凝土组合结构的静力性能已经进行了大量的试验研究和理论研究,但对钢-混凝土组合结构在地震波作用下的抗震性能的研究多以试验为主,理论为辅。本文运用有限元法对钢-混凝土组合结构的抗震性能以及静力性能进行研究。主要研究内容如下： (1)选择一种在反复加载和循环加载下的适合运用于ABAQUS软件分析的混凝土塑性损伤本构模型和钢材混合强化模型,并通过利用ABAQUS软件对循环荷载下圆钢管混凝土柱、钢混凝土组合梁、钢管混凝土柱-钢梁组合节点、钢管混凝土柱-钢梁组合框架进行非线性有限元分析,建立三维有限元模型,将计算结果与试验结果进行对比,验证所选择的本构模型适用于钢-混组合结构的抗震性能分析； (2)利用ABAQUS软件对两层一跨圆钢管混凝土柱-钢混凝土组合楼盖框架进行非线性有限元分析,在此基础上建立钢-混凝土组合框架在不同峰值加速度的地震波作用下的三维有限元模型,将计算结果与试验结果进行对比分析,通过典型的算例分析钢-混凝土组合框架在地震波作用下的时程分析；分析剪力连接件构件数量对钢-混凝土组合框架抗震性能的影响； (3)利用ABAQUS软件对哑铃型钢管混凝土轴压中长柱进行非线性有限元分析,建立哑铃型钢管混凝土柱的三维有限元模型,主要考虑长细比、含钢率、钢材强度和混凝土强度对哑铃型钢管混凝轴压中长度稳定性的影响,提出考虑了长细比和含钢率因素的哑铃型钢管混凝土轴压中长柱的承载力实用计算公式。
[Abstract]:The static behavior of steel-concrete composite structures has been studied in many experiments and theories at home and abroad, but the seismic behavior of steel-concrete composite structures under the action of seismic waves is mainly studied by experiments, and the theory is secondary. In this paper, finite element method is used to study the seismic and static behavior of steel-concrete composite structures. The main contents of the study are as follows: 1) selecting a concrete plastic damage constitutive model and steel mixed strengthening model suitable for the analysis of ABAQUS software under repeated and cyclic loading, and using ABAQUS software to analyze the circular concrete-filled steel tube columns under cyclic load. The nonlinear finite element analysis of steel reinforced concrete composite beam, concrete-filled steel tubular column-steel beam composite joint and concrete-filled steel tubular column steel beam composite frame is carried out, and the three-dimensional finite element model is established, and the calculated results are compared with the experimental results. It is verified that the selected constitutive model is suitable for the seismic performance analysis of steel-concrete composite structures. Using ABAQUS software, the nonlinear finite element analysis of the composite floor frame with two stories and one span circular concrete-filled steel tube column and steel concrete is carried out. On this basis, the three-dimensional finite element model of steel-concrete composite frame subjected to seismic waves with different peak accelerations is established, and the calculated results are compared with the experimental results. The time-history analysis of steel-concrete composite frame under the action of seismic wave and the influence of the number of shear connection members on the seismic behavior of steel-concrete composite frame are analyzed through typical examples. In this paper, the nonlinear finite element analysis of concrete filled dumbbell concrete filled steel tube columns under axial compression is carried out by using ABAQUS software, and the three-dimensional finite element model of concrete filled steel tube columns is established, which mainly considers the aspect ratio and steel content. The influence of steel strength and concrete strength on the stability of the length of concrete filled dumbbell-shaped steel tube under concrete-bearing axial compression is studied. A practical formula for calculating the bearing capacity of concrete filled dumbbell-shaped steel tube under axial compression is presented, which takes into account the factors of aspect ratio and steel ratio.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398.9;TU311.3

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