Investigation of the Behavior of Special Steel Concentrically Braced Frames Under Post Earthquake Fire Loading

The occurrence of fire following earthquake is an important issue for buildings in moderate to high seismic areas. In this paper, in order to provide an insight into the effects of post-earthquake fire in steel structures, using finite element simulation, the behavior of the special steel concentrically braced frames exposed to this loading is examined. Simulation of the structure under earthquake load was performed using nonlinear time histories analysis. By placing the post-earthquake structure as the initial condition, mechanical thermal analysis was carried out by applying the temperature-time curve on exposed elements. The results of the analysis showed that the resistance time of the fire structure, regardless of the characteristics of the earthquake record and the fire scenarios for the special steel concentrically braced frames, was very short and the effects of the previous earthquake on it were negligible.