Ultimate strength analysis of reinforced concrete sections subject to axial force and biaxial bending

摘要

Two algorithms are presented for evaluating the ultimate strength capacity of reinforced concrete (RC) sections of arbitrary shape, either single- or multicell, subjected to axial force and biaxial bending. Both algorithms adopt a secant strategy for the solution of the nonlinear equilibrium equations, thus resulting in a considerable rate of convergence. An original integration formula is proved. It represents the rationale for evaluating the geometric or elastic properties of the section by carrying out the integrations along the relevant boundary.