Collapse Analysis of Inelastic Nonlinear Steel Frames with Bracing System Using Advanced Analysis Method

This study aims to use the advanced analysis method to analyze the collapse of inelastic nonlinear steel frames with bracing systems under static loadings. In this paradigm, the stability functions resolved from a closed-form solution of a beam-column element are used to represent its geometric nonlinearity. Moreover, the material nonlinearity is also considered by the refined plastic hinge approach that is based on Column Research Council (CRC) tangent modulus and Orbison yield surface. Meanwhile, the updated Lagrangian formulation is utilized to model the geometric nonlinearity of truss-like bracing members. In addition, the inelastic post-buckling behavior is also taken into account. A Python-programmed code structure is done to investigate the bracing system effect on the collapse of a two-story space frame.