Progressive failure means, failure or total destruction or part of the structure due to the lack of the ability of a part of the structure which to be damaged and not able to distribute overload for the stability and continuity of the structure. Different improvement methods are accessible to reach buildings where are vulnerable to events in relation to progressive failure. These procedures are designed to provide the property and health of human life. By adopting the optimum improvement manner, taking into account the economic and technical considerations, it can be reduced the value of financial and life loss caused by the progressive failure. In this study, explosion modeling was performed by the CONWEP program (Conventional Weapons Effects Program) in ABAQUS / CAE software. CONWEP is a loading model based on experimental results, in the ABAQUS software environment. The which is very important, is the involvement of the side openings of the ninth column which is done under the conditions of the removal of the eighth floor column and in the post-blast operating conditions reduces the efforts of the ninth-grade deck girders with tensile performance. Considering that the brackets are in design condition for the maximum operating and ultimate traction modes there is always some overcapacity to the design controller mode, which is mainly pressure, therefore, these added capacities are used under abnormally explosive conditions and eliminate the short- and long-term effects of column removal. Manuscript profile