ANALYSIS OF PROGRESSIVE COLLAPSE IN RC FRAME STRUCTURE FOR DIFFERENT SEISMIC ZONES

When a building gets exposed to any natural hazards say Tsunami or Earthquake or due to manmade hazards such as fire, explosion of gases, impact of vehicles ,etc., it effects the behavior of structure and causes collapse of a portion of structure or entire building.Progressive collapse implies a phenomenon of sequential failure of part of the structure or the complete structure initiated by sudden loss of vertical load carrying member ( mostly column). In this present study, the behavior of RC framed buildings with 5 stories and 8 stories to progressive collapse located in different seismic zones (zone ii and zone v) is investigated.A linear static analysis is worked out using ETABS Software Ver. 15.0 respectively. The demand capacity ratio is assessed in the critical region of the RC portion associated with the column removed, as per the provisions of GSA guidelines. The paper concluded that with the additional reinforcement in beams there is less susceptibility of progressive collapse, and also a building designed to resist earthquake loading has intrinsic capacity against progressive collapse