Linear and Nonlinear Static Analysis to Assess Progressive Collapse Potential of Framed Building

Abstract

Number of engineering failures is related to accidental loading effects, which are difficult to quantify and incorporate in the original design. The threat of terrorism has highlighted the need to explicitly consider collapse resistance particularly for critical structures. The failure of a member in the primary load resisting system leads to redistribution of force to the adjoining members, this process continues in the structure and eventually the building collapses. This phenomenon is referred as progressive collapse of the structure. In the present study the progressive collapse potential of reinforced concrete four storey frame structure is evaluated using General Service Administration (GSA) guidelines. The demand capacity ratios (DCR) found using linear static analysis at critical locations are compared with the hinge formation pattern obtained from nonlinear static analysis. The linear static and nonlinear static analyses of frame structures are performed using SAP2000 software.