多层钢—混凝土组合框架结构抗震性能三维精细有限元分析

发布时间：2018-06-20 17:08

本文选题：钢-混凝土组合框架 + 三维精细有限元　；参考：《中南大学》2014年硕士论文

【摘要】：摘要：国内外对钢-混凝土组合框架结构抗震性能的研究主要以简单框架形式的拟动力试验方法和杆系有限元分析为主,三维精细壳-实体有限元分析方法的应用还比较少见。本文通过ABAQUS有限元分析软件对多层钢-混凝土组合框架结构的抗震性能进行三维精细有限元分析。主要研究内容如下： (1)介绍ABAQUS的基本分析方法,并基于本课题组提出的混凝土塑性-损伤本构关系,以及钢材弹塑性硬化单调加载本构关系和混合强化循环加载本构关系,介绍钢-混凝土组合框架的建模方法以及模态分析方法,对其自振性能进行分析,得到结构的自振频率。 (2)从静力角度出发,通过ABAQUS软件对八边形钢管混凝土短柱进行有限元分析与试验验证,提出八边形钢管混凝土轴压短柱的承载力公式；从拟静力角度出发,利用ABAQUS有限元软件对圆钢管混凝土柱、方钢管混凝土柱、钢-混凝土组合梁、圆钢管混凝土柱-钢梁组合节点以及圆钢管混凝土柱-钢梁组合框架进行滞回性能分析与试验验证；从拟动力角度出发,利用ABAQUS有限元软件对已有的钢-混凝土组合框架模型试验结果进行弹塑性地震反应分析与对比。 (3)采用合理的混凝土与钢材本构关系,利用ABAQUS有限元软件建立3×3跨10层钢-混凝土组合框架的三维精细有限元实体模型,分析其在八种工况地震波作用下的弹塑性时程反应,分析该框架结构的位移时程反应、各关键部位钢管、核心混凝土、钢梁和栓钉的应力时程反应,探讨地震作用下钢-混凝土组合框架结构中钢管与混凝土的相互作用、栓钉的耗能作用,显示该框架结构在地震波作用下的良好动力性能。
[Abstract]:Absrtact: the research on seismic behavior of steel-concrete composite frame structures at home and abroad mainly consists of pseudo-dynamic test method in simple frame form and finite element analysis of bar system, and the application of three-dimensional finite-shell solid finite element analysis method is relatively rare. In this paper, the seismic behavior of multi-story steel-concrete composite frame structure is analyzed by using Abaqus finite element analysis software. The main research contents are as follows: (1) the basic analysis method of Abaqus is introduced, and based on the plastic damage constitutive relation of concrete proposed by our group, The constitutive relation of elastoplastic hardening monotone loading and mixed reinforced cyclic loading is introduced. The modeling method and modal analysis method of steel-concrete composite frame are introduced, and its natural vibration performance is analyzed. From the static point of view, the finite element analysis and experimental verification of octagonal concrete filled steel tubular short columns are carried out by Abaqus software, and the bearing capacity formula of octagonal concrete filled steel tubular short columns is put forward. From the point of view of quasi-static force, using Abaqus finite element software, the concrete filled circular steel tube column, square steel tube concrete column and steel-concrete composite beam are studied. The hysteretic behavior of circular concrete-filled steel tubular column-steel beam composite joints and circular concrete-filled steel tubular column-steel beam composite frames are analyzed and tested. By using Abaqus finite element software, the elastoplastic seismic response analysis and comparison of the experimental results of the existing steel-concrete composite frame model are carried out. (3) A reasonable constitutive relation between concrete and steel is adopted. Using Abaqus finite element software, the 3D fine finite element solid model of 3 脳 3 脳 3 span 10 story steel-concrete composite frame is established. The elastic-plastic time-history response and displacement time-history response of the frame structure under the action of seismic waves under eight conditions are analyzed. The stress time history response of steel tube, core concrete, steel beam and bolt in every key position is discussed. The interaction between steel tube and concrete and the energy dissipation of bolt in the steel-concrete composite frame structure under earthquake are discussed. The results show that the frame structure has good dynamic performance under seismic waves.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9

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