多种组合形式钢管混凝土梁柱平面框架力学性能研究

发布时间：2018-01-27 01:24

本文关键词： 钢管混凝土框架力学性能有限元分析抗震性能　出处：《沈阳工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着钢管混凝土结构在高层住宅建筑、超高层建筑的推广应用,不同梁柱组合钢管混凝土结构的抗震性能受到人们广泛关注。到现阶段为止针对钢管混凝土构件方面,尤其是对不同钢管混凝土梁柱节点上进行了较多的研究,而关于梁柱均为钢管混凝土的框架结构的研究较少。本文结合钢管混凝土结构的发展应用方向和国内外针对钢管混凝土结构的研究重点,对比分析了分别采用两种节点连接方式,即外加强环式节点、螺栓连接的单层单跨钢管混凝土柱-钢管混凝土梁、钢管混凝土柱-钢梁、钢柱-钢梁一共六个平面框架的力学性能及破坏模式。具体研究工作主要包括:依据已有的试验数据,通过有限元软件ABAQUS建立钢管混凝土柱-工字钢梁框架模型,完成了在水平循环荷载作用下的数值计算分析,有限元计算结果表明所建立框架模型的破坏模式、滞回曲线及承载力等数据均与试验吻合较好,验证了模型选取的材料本构模型和粘结滑移本构模型的正确性;进行了这三种组合形式梁柱平面框架结构的梁柱截面及螺栓尺寸的设计计算,并在有限元软件ABAQUS中完成了六个梁柱平面框架结构模型在水平单调荷载作用下计算分析,计算结果显示钢管混凝柱-钢管混凝土梁框架结构的水平承载力最大;完成了六个梁柱平面框架结构在水平循环荷载作用下的有限元弹塑性分析,在此基础上明晰各平面框架在受力过程中截面应力分布规律及破坏模式等微观机理;对比分析了六个梁柱平面框架的强度退化、刚度退化、耗能能力等抗震指标。数值计算得到的滞回曲线均呈饱满无捏缩的梭形形状,表明采用加强环和螺栓连接的三种组合形式梁柱平面框架均具有较好的抗震耗能能力;分析结果表明,在节点连接形式相同的情况下,钢管混凝柱-钢管混凝土梁框架结构的抗震指标均高于其它两种组合结构。经过对六个梁柱平面框架结构在水平单调和循环荷载下的力学性能综合对比分析,采用螺栓连接的钢管混凝柱-钢管混凝土梁框架显示出较优的力学性能,且具有在施工中安装便捷的优点,有益于在工程中实践,可为钢管混凝土结构的工程应用推广提供参考。
[Abstract]:With the application of concrete filled steel tube (CFST) structure in high-rise residential buildings, super high-rise buildings are widely used. The seismic behavior of concrete filled steel tubular (CFST) structures with different Liang Zhu has received wide attention. Up to the present stage more research has been done on concrete-filled steel tubular members especially on the various concrete-filled steel tubular (CFST) Liang Zhu joints. However, there is little research on the frame structure of which Liang Zhu is concrete filled steel tube. This paper combines the development and application of concrete-filled steel tubular structure and focuses on the research of concrete-filled steel tubular structure at home and abroad. Two kinds of connection modes are compared and analyzed, that is, single layer concrete filled steel tubular column with single span and concrete filled steel tube beam, concrete filled steel tube column and steel beam with bolt connection. The mechanical properties and failure modes of six plane frames with steel column and steel beam. The specific research work mainly includes: according to the existing test data. The model of concrete-filled steel tubular column-I-beam frame is established by finite element software ABAQUS, and the numerical calculation and analysis under horizontal cyclic load are completed. The results of finite element analysis show that the failure mode, hysteretic curve and bearing capacity of the frame model are in good agreement with the test, and the validity of the material constitutive model and the bond-slip constitutive model are verified. The design and calculation of Liang Zhu cross section and bolt size of Liang Zhu plane frame structure are carried out. In the finite element software ABAQUS, six Liang Zhu plane frame structure models are calculated and analyzed under horizontal monotone load. The results show that the horizontal bearing capacity of concrete-filled steel tubular column and concrete filled steel tubular beam frame structure is the largest. The finite element elastic-plastic analysis of six Liang Zhu plane frame structures under horizontal cyclic load is completed, and the micro-mechanism of stress distribution and failure mode of each plane frame is clarified. The seismic indexes such as strength degradation, stiffness degradation and energy dissipation capacity of six Liang Zhu plane frames are compared and analyzed. The hysteretic curves obtained by numerical calculation all show full and no pinch spindle shape. The results show that the three kinds of combined Liang Zhu frame with reinforced ring and bolt have good seismic energy dissipation ability. The analysis results show that when the connection form is the same. The seismic index of concrete-filled steel tubular column and concrete-filled steel tubular beam frame structure is higher than that of the other two kinds of composite structures. The mechanical properties of six Liang Zhu plane frame structures under horizontal monotonic and cyclic loads are compared and analyzed. The concrete filled steel tube concrete filled steel tube frame with bolt connection shows better mechanical properties and has the advantages of convenient installation in construction, which is beneficial to practice in engineering. It can provide a reference for the engineering application of concrete filled steel tube structure.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9

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