Abstract: Abstract: In order to study the temperature field variation of compound concrete-filled steel tube column during the whole process of fire rise and fall, the whole temperature field model of compound concrete-filled steel tube column was established by using ABAQUS finite element software. The results show that the inner steel tube can reduce the temperature of the inner concrete and improve the fire resistance of the concrete filled steel tube. The maximum temperature of the inner steel tube is much lower than that of the outer steel tube. Fire-resistant coating and increased section size can greatly reduce the maximum temperature of the concrete in the core area, but will not affect the maximum temperature of the outer steel pipe.

Key words: compound concrete-filled steel tube, fire-resistant performance, finite element analysis, temperature field