Abstract: Abstract: Prefabrication and assembly is an important development direction of subway station, and the research on its post-earthquake fire performance is relatively few at present. In this paper, the three-dimensional finite element model of single-layer double span assembled subway station is established. The deformation of the station under three working conditions of earthquake, fire and fire after earthquake is compared and analyzed by using the far boundary and HC standard temperature rise curve and considering the location of fire source. The results show that the subway station is damaged in "M" shape under earthquake, and the center column of subway station is bent and deformed under fire and post-earthquake fire; under the action of fire, compared with the roof and side wall, the temperature rise of the middle column is the fastest. When a single span is under fire, the relative displacement between the top and bottom of the middle column increases rapidly and then tends to be stable. When a full span is under fire, the deformation of the middle column initially develops slowly and then increases suddenly; the deflection development trend of roof under single fire and post-earthquake fire is similar, and the initial deformation development of side wall is similar; the development law of internal force response under separate fire is similar to that after earthquake. Considering the earthquake damage, the internal force of each component changes more obviously.

Key words: Key words: prefabricated subway station; fire; post-earthquake fire; finite element analysis