Nonlinear Static Analysis Study on Progressive Collapse Behaviour of 2D RC Frame with Different Grades of Steel

Progressive collapse is the failure of the structure, whereas the initial failure occurs in a beam and column of a structure that results in a total failure of an entire building; one of the major failures that should be considered in a high-rise building is progressive collapse, in which the minute damage occurs in an element like beam or column that a local failure of a structure results or develop in a global failure. And this present study deals with a two-dimensional two-bay 5-storey, 10-storey, and 15-storey RC bare frame, by providing lateral loads to it, and their results were compared with different grades of steel such as FE415, FE500, and FE550 under the corner and middle column removal condition, and for this study, the nonlinear static analysis is carried out using the finite element software (Abaqus). The determination of ductility behaviour, robustness index, and base shear versus displacement was checked under the analysis and by referring the General Services Administration (GSA 2003) guidelines. The result was compared with different steel grades under different storey levels by considering the removal of the corner and middle column. According to the comparative results, the FE415 grade of steel–concrete frame in the condition of corner column removal has a critical collapse mechanism compared to the middle corner and middle column of FE500 and FE550 grade of steel.