In this paper, post-earthquake fire modeling was studied in steel structures with different levels of ground motion intensity. Three-story structure modeling was implemented under post-earthquake fire by using the OpenSees software. The performance of the structure was investigated under different levels of ground motion intensity to the level of life safety. The structure was subjected to seismic and thermal analysis by applying standard fire load up to 880 s of fire. The 9-point thermal gradient for beam and column profiles under heat was analyzed by heat transfer analysis in the software. By comparing obtained results from the seismic analysis and post-earthquake fire analysis, it can be seen that for different levels of ground motion intensity, the behavior of the structure is different when it is exposed to post-earthquake fire than being exposed to the earthquake alone, which can affect the performance-based design of the structure. Therefore, in the design of structures, the effect of post-earthquake fire should be taken into account, considering the seismic zone of the structure and the time required to extinguish the fire.

在本文中，研究了具有不同地震动强度水平的钢结构的震后火灾模型。使用OpenSees软件实现了震后火灾下的三层结构建模。在不同水平的地震动强度到生命安全水平下研究了结构的性能。该结构通过应用高达 880 秒的标准火灾荷载进行地震和热分析。通过软件中的传热分析来分析受热下梁和柱轮廓的 9 点热梯度。通过比较地震分析和震后火灾分析的结果，可以看出，对于不同程度的地震动强度，结构在地震后火灾中的行为与单独暴露在地震中时不同，这会影响结构的基于性能的设计。因此，在结构设计时，应考虑地震后火灾的影响，考虑结构的地震带和灭火所需的时间。