本文根据复杂应力状态下混凝土类材料的强度理论,利用平衡条件建立了钢筋混凝土梁斜截面强度的理论计算公式。从理论角度查明了剪跨比,纵向钢筋配筋百分率,混凝土标号,腹筋量等因素对钢筋混凝土梁斜截面强度的影响。最后,将本文公式的计算结果同有腹筋梁的实验资料以及经验公式比较,结果是令人满意的。 In this paper, according to the strength theory of concrete materials under complex stress state, the theoretical calculation formula of the oblique section strength of reinforced concrete beams is established using the equilibrium conditions. From the theoretical point of view, the factors such as shear-span ratio, percentage of reinforcing bar reinforcement, number of concrete bars, amount of web reinforcement and other factors have been investigated. Finally, the results of this formula are compared with experimental data and empirical formulas with web reinforcement. The results are satisfactory.