钢筋混凝土构件承载力统一计算模式研究

基于复杂受力下钢筋混凝土构件的受力相关性，以弯扭相关性作为连接剪扭相关性和压弯相关性的桥梁，推导了钢筋混凝土构件承载力计算的统一计算式，考虑了压弯剪扭四种受力状态的受力相关性。由该计算式推得的单一受力和复合受力状态下的承载力计算式与国内外试验数据符合较好，计算式不仅适用于所有单一受力状态下的承载力计算，还适用于压弯、剪扭、弯扭、弯剪和压剪5个两相关计算，弯剪扭、压弯剪三相关计算以及压弯剪扭四相关计算。按统一计算式得到的配筋量比GB 50010-2002《混凝土结构设计规范》的配筋量更为合理，且计算结果与试验结果吻合较好。

Research of unified bearing capacity calculation method of reinforced concrete members

Tests of reinforced concrete (RC) members under the combined loading indicated that various kinds of bearing capacity would interact each other. However, the overall interaction of various force state is not considered thoughtfully in component design, leading to potential danger of structures. Using flexure-torsion interaction to connect shear-torsion and flexure-compression interaction, a unified formula was proposed in this paper considering the overall interactions of compression, shear, flexure and torsion. Every kind of interaction bearing capacity formulae can be deduced from the unified formula and easily used to determine the security of the member under various loading states. Experimental data were compared with the calculations of the proposed formula and good agreement was obtained. Finally, reinforcement obtained by the unified formula is more reasonable and more consistent with the experimental results compared with GB 50010-2002.