چكيده به لاتين
Progressive collapse in a building cause local damage, and then spread throughout the system and on a large scale, the collapse of the entire building. Progressive deterioration is usually caused by fire, gas explosion, terrorist attack, vehicle collisions, design and construction mistakes. Therefore, it is necessary to study and investigate the effect of this phenomenon on structures and to rebuild the building against it. Based on this, in this research, we will examine and evaluate some proposed solutions in the technical literature for reinforcing reinforced concrete (RC) frames against progressive collpase. One of these solutions can be the use of reinforcement bars up and down, as well as the effect of the cross section of the beam to participate in the chain performance, the use of CFRP sheet in the bottom layer and the three sides of the beam section and the effect of the additional layer, as well as the impact of the compressive strength of the concrete (F'c) in the sectional performance of the beam against progressive failure. In the present study, using a numerical method, a 2-story frame is retrofitted using the above techniques, and the results show that by increasing the reinforcement percentage and also using CFRP, it improves the chain performance, and each of these techniques is The final performance is evaluated.
