Progressive collapse of irregular RC building

Abstract

Progressive collapse occurs when one of a structure's essential elements fails, causing subsequent structural elements to fail as well, resulting in the entire structure or a portion of it collapse. The failure of a structure's vertical element is the most common cause of the structure's progressive collapse. Blast loads, accidents, or intentional destruction can all cause a column to fail, resulting structural collapse. The influence of column failure on an irregular reinforced concrete (RC) building of G + 5 storey is explored in this study. To better understand the structure's seismic behaviour, a non-linear static analysis (NSA) is conducted using General Services Administration (GSA) loading and establishing the crucial points in the structure that are prone to collapse. The demand capacity ratios defined using linear static analysis (LSA) are compared to the hinge formation derived from NSA at important locations. The behaviour of the progressive collapse analysis is investigated when a sudden column loss occurs due to the impact of the blast load. The collapse resistance of a structure is determined when it is subjected to blast loads. The DCR values were calculated and compared to the acceptance criteria in the GSA guidelines, and it was revealed that the DCR values obtained surpassed the acceptance criteria. The design has been discovered to be prone to progressive collapse, and regular design considerations must be followed to avoid this failure.