In order to simulate the real fire resistance in the projects

this paper presented a finite element model（FEM） of concrete-filled steel tubular（CFST） columns and composite beam single-story-single-span planar frame after exposure to overall stage of fire based on ABAQUS.The whole phases including loading at ambient

heating

cooling and post-fire

which followed the ISO-834 standard fire curve.The temperature model was established with the determinations of thermal parameters of steel and core concrete.The temperature distribution of CFST columns and composite beam was calculated using FEM.The mechanical behavior of CFST columns and composite beam frame working in entire stage of fire was discussed in this paper.The result shows that:The CFST composite frame still has high bearing capacity after exposure to overall stage of fire due to the heat absorption and the constraint function of reinforced concrete floor.The results of this paper can provide a basis for fire-damage assessment of composite beam frame with CFST columns.