Parametric Study on Progressive Collapse for RC Structure

The failure of single structural element which leads to complete collapse of structure can be defined as progressive failure or in short it can be defined as collapse of building by the transformation of local failure to global failure. In the present study a 12 storey, L shaped a symmetrical RCC building is taken under consideration with storey height as 3 meter, beam size uniform throughout the building and column dimension varying along height. The bay size is 4 meter in X-direction and 3.5 meter in Y-direction. The structure is analyzed under gravity loads only by using linear static method as per G.S.A guidelines. Totally 4 different analysis results are obtained by removing 4 different columns at specified locations as per G.S.A. According to G.S.A standards, if the D-C Ratio of any structural element exceeds 2 then it is considered as unsafe and Interaction ratio should not exceed 1. The results for; Bending-moment, Axial-Load and Interaction ratio are obtained and compared with one and other. After analyzing and comparing the results it is concluded that, the Interior Column removal at the base case was critical case among the 4 cases.