In this paper, a systematic and in-depth study is carried out on the key engineering problem of the accurate calculation of the flexural capacity of L-shaped concrete-filled steel tubular columns. Based on the basic framework of mechanics theory, the basic design principle of reinforced concrete members is integrated, and the nonlinear characteristics of steel and concrete materials in the process of stress are mainly considered, such as steel yield strengthening, concrete compression damage, etc., and the ultimate bending moment calculation model which is more suitable for the actual stress state is constructed. Through rigorous theoretical derivation and multi-parameter comparative analysis, the final formula for calculating the bearing capacity of special-shaped columns not only has clear mechanical concept support, but also systematically defines the scope of application of the calculation method. The verification results show that the established calculation method not only meets the requirements of the current engineering specifications, but also clarifies the influence of key factors such as section size, material strength and reinforcement ratio on the bearing capacity through parametric analysis.
The calculation process has the rigor of the theoretical system and the convenience of engineering application: the designer only needs to input the geometric parameters of the component such as the section size, the thickness of the steel tube and the material properties such as the yield strength of the steel and the compressive strength of the concrete cube, and can directly apply the formula to complete the bearing capacity check, which greatly simplifies the traditional calculation process.