复合受力型钢混凝土构件的受扭破坏机理及抗震性能研究
发布时间：2018-08-06 12:00
【摘要】：型钢混凝土组合结构是在钢筋混凝土结构中嵌入型钢的一种独立存在的结构形式。由于型钢本身具有很高的强度及很好的延性,再加之型钢、钢筋和混凝土独特的三位一体的组合作用使型钢混凝土组合结构具有了比传统形式上的钢筋混凝土结构承载力高、刚度大、抗震性能好的优势。相对于钢结构,型钢混凝土组合结构的优势主要表现在：很好的抗火性能、结构局部和整体稳定性好、造价低较经济等等。国内外相关试验研究表明,型钢混凝土组合结构能够在低周反复荷载作用下表现出良好的滞回特性及耗能能力。随着我国经济的快速发展,越来越多的高层建筑应运而生,使得型钢混凝土组合结构得到了越来越广泛的应用。而在实际工程结构中,大多数型钢混凝土构件往往处于压弯剪扭的复合应力状态下工作,如框架结构的边梁、托梁、超高层建筑的转换层大梁、水平荷载作用下结构的角柱等。因而,对型钢混凝土构件进行复合受扭性能的研究显得相当重要。本文通过对7根十字形型钢混凝土柱和1根钢筋混凝土柱在低周反复荷载作用下的复合受力的试验研究,观察记录了试件在整个受力过程中裂缝的开展状况,混凝土、型钢及钢筋的变形规律,分析了轴压比、扭弯比、配箍率和有无栓钉等试验参数对型钢混凝土构件受扭破坏及其抗震性能的影响。并通过大型通用有限元软件ABAQUS对构件进行非线性分析,与试验结果进行对比研究,总结复合受力下型钢混凝土柱的受扭破坏机理及其抗震性能。最后,根据试验研究及理论分析,文章提出了型钢混凝土复合受扭构件的破坏机理及承载力计算公式,总结了其抗震性能并对其影响因素做了简要分析。经过本文的的研究学习,得到了一些有益的结论,也能为以后的分析研究提供一定的理论支持。
[Abstract]:Steel reinforced concrete composite structure is an independent structure form embedded in reinforced concrete structure. Due to the high strength and ductility of the section steel and the unique trinity of the steel bar and concrete, the steel reinforced concrete composite structure has higher bearing capacity than the traditional reinforced concrete structure. High stiffness and good seismic performance. Compared with steel structure, the advantages of SRC composite structure are as follows: good fire resistance, good local and overall stability, low cost and so on. The experimental results at home and abroad show that steel reinforced concrete composite structures can exhibit good hysteretic characteristics and energy dissipation capacity under low cyclic loading. With the rapid development of economy in China, more and more high-rise buildings emerge as the times require, which makes the steel reinforced concrete composite structure more and more widely used. However, in practical engineering structures, the majority of SRC members often work under the composite stress state of compression, bending, shear and torsion, such as the side beam of frame structure, the bracket beam, the transfer story beam of the super high-rise building, the corner column of the structure under horizontal load, and so on. Therefore, it is very important to study the composite torsional behavior of SRC members. In this paper, through the experimental study on the composite force of 7 cross shaped steel reinforced concrete columns and 1 reinforced concrete column under low cyclic loading, the crack development status of the specimens during the whole process of loading is observed and recorded, concrete, concrete, The effects of axial compression ratio, torsional bending ratio, hoop ratio and stud ratio on the torsional failure and seismic behavior of steel reinforced concrete members are analyzed. The nonlinear analysis of the members is carried out by using the general finite element software ABAQUS, and the results are compared with the experimental results. The torsional failure mechanism and seismic behavior of steel reinforced concrete columns under composite force are summarized. Finally, according to the experimental research and theoretical analysis, the failure mechanism and bearing capacity calculation formula of SRC composite torsional members are put forward, and the seismic behavior of SRC members is summarized and the influencing factors are analyzed briefly. Through the research and study of this paper, some useful conclusions are obtained, which can also provide some theoretical support for the later research.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9;TU352.11
[Abstract]:Steel reinforced concrete composite structure is an independent structure form embedded in reinforced concrete structure. Due to the high strength and ductility of the section steel and the unique trinity of the steel bar and concrete, the steel reinforced concrete composite structure has higher bearing capacity than the traditional reinforced concrete structure. High stiffness and good seismic performance. Compared with steel structure, the advantages of SRC composite structure are as follows: good fire resistance, good local and overall stability, low cost and so on. The experimental results at home and abroad show that steel reinforced concrete composite structures can exhibit good hysteretic characteristics and energy dissipation capacity under low cyclic loading. With the rapid development of economy in China, more and more high-rise buildings emerge as the times require, which makes the steel reinforced concrete composite structure more and more widely used. However, in practical engineering structures, the majority of SRC members often work under the composite stress state of compression, bending, shear and torsion, such as the side beam of frame structure, the bracket beam, the transfer story beam of the super high-rise building, the corner column of the structure under horizontal load, and so on. Therefore, it is very important to study the composite torsional behavior of SRC members. In this paper, through the experimental study on the composite force of 7 cross shaped steel reinforced concrete columns and 1 reinforced concrete column under low cyclic loading, the crack development status of the specimens during the whole process of loading is observed and recorded, concrete, concrete, The effects of axial compression ratio, torsional bending ratio, hoop ratio and stud ratio on the torsional failure and seismic behavior of steel reinforced concrete members are analyzed. The nonlinear analysis of the members is carried out by using the general finite element software ABAQUS, and the results are compared with the experimental results. The torsional failure mechanism and seismic behavior of steel reinforced concrete columns under composite force are summarized. Finally, according to the experimental research and theoretical analysis, the failure mechanism and bearing capacity calculation formula of SRC composite torsional members are put forward, and the seismic behavior of SRC members is summarized and the influencing factors are analyzed briefly. Through the research and study of this paper, some useful conclusions are obtained, which can also provide some theoretical support for the later research.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9;TU352.11
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