Analysis Of The Progressive Collapse Behavior Of The RC Frame Structures Reinforced By High-Performance Composite Material

This research aimed to explore the progressive collapse of the reinforced concrete structure strengthened by Steel Fiber Composite Bars(SFCBs)under the post-yield stiffness of the members.In performing alternative path analyses for checking the potential of a structure to progressive collapse,most designers often choose static procedures,which tend to be simpler and less labour demanding,also according to the post-yield stiffness of the members,it has been favourable to work in nonlinear static analysis by following the General Service Administration 2003 to achieve this research.The 3D model has been built on sap2000 v 15.0.1.In order to assess the potential of the structure in the progressive collapse,three columns has been removed step by step in different locations of the first story according to the GSA guidelines,and the DCR values of the members had been checked.In order to examine the post yield stiffness behavior of the SFCBs material compared to ordinary steel bars,many investigations had been done on the changing of the values of force-displacement(moment-rotation)curve on sap2000 v 15.0.1.The P delta curves had been compared among the different values of the post yield stiffness,and the plastic hinge rotation.Afterwards,the different columns removal cases also had been compared in order to see the most serious case,and the enhanced percentage of the SFCB on the ordinary steel has been clarified case by case.The evidence presented shows that the use of RC frame structures strengthened by high-performance composite material(SFCB)is a viable option for earthquake-resistant construction and phenomenon like progressive collapse,because of the good performance in the post yield stiffness compared to ordinary steel.