钢骨混凝土叠合梁正截面抗弯性能研究

发布时间：2018-11-01 15:58

【摘要】：钢骨混凝土结构刚度大、承载能力高、抗震性能优越,这些优点使其成为高烈度设防地区高层、重载、大跨及高耸结构的首选结构形式。近年来,随着装配整体式建筑的发展,钢骨混凝土叠合构件在建筑业中应运而生,但目前关于该叠合构件的相关研究较少,尚未形成统一的设计理论。因此,本文主要研究该类构件的正截面受弯承载力和延性。本文通过自编程序,以钢骨混凝土叠合梁为研究对象,运用平面有限元法、极限平衡理论法、叠加法对其正截面受弯承载力进行计算,并对比分析其计算结果,探讨三种方法的准确性和优缺点。同时研究了配钢率、钢骨翼缘尺寸、钢骨位置等因素对该叠合梁正截面承载力的影响。最后,本文用平面有限元法对钢骨混凝土叠合梁的截面延性进行了研究,编制了梁截面曲率延性计算程序,探讨了该叠合梁的截面延性的主要影响因素及其规律;运用Matlab软件绘制出钢骨混凝土叠合梁和普通钢骨混凝土梁的M-θ曲线,得到了不同条件下钢骨混凝土叠合梁截面曲率延性系数。研究结果表明,纵筋的配筋率及配置方式、钢骨的配钢率及配置方式、翼缘的宽度等因素对钢骨混凝土叠合梁截面延性有较大的影响。
[Abstract]:The steel reinforced concrete structure has the advantages of large stiffness, high bearing capacity and superior seismic performance. These advantages make it the preferred structural form for high-rise, heavy load, long span and towering structures in high intensity fortification areas. In recent years, with the development of the assembly integral building, the steel reinforced concrete composite member emerged as the times require in the construction industry, but there is little research on the composite member at present, which has not yet formed a unified design theory. Therefore, this paper mainly studies the flexural bearing capacity and ductility of this kind of members. In this paper, the flexural bearing capacity of steel reinforced concrete composite beams is calculated by means of plane finite element method, limit equilibrium theory and superposition method, and the results are compared and analyzed. The accuracy, advantages and disadvantages of the three methods are discussed. At the same time, the influence of steel ratio, steel flange size and steel bone position on the bearing capacity of the composite beam is studied. Finally, the section ductility of steel reinforced concrete composite beam is studied by using plane finite element method, and the calculation program of section curvature ductility is compiled, and the main influencing factors and its law of section ductility of the composite beam are discussed. The M- 胃 curves of steel reinforced concrete composite beams and ordinary steel reinforced concrete beams were plotted by using Matlab software, and the curvature ductility coefficients of steel reinforced concrete composite beams were obtained under different conditions. The results show that the ratio and configuration of longitudinal reinforcement, the steel ratio and configuration of steel bone, and the width of flange have great influence on the ductility of steel reinforced concrete composite beams.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU398.9

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