To study the effects of different parameters on the performance of high-strength steel tube concrete columns under axial compression after a fire,ABAQUS finite element software was used to simulate the axial compression model of high-strength steel tube concrete columns after fire.The bearing capacity-displacement curve of the component was analyzed with the main parameters of steel pipe yield strength,fire time and concrete strength,and the typical curve of high-strength concrete-filled steel tube column after fire was analyzed.The results showed that with the increase of the yield strength of the steel pipe and the strength of the concrete,the ultimate bearing capacity of the component increased,and the ultimate bearing capacity of the component decreased with the increase of the fire time,and on the whole,the concrete in the component bore the main load when the fire time was 60,90 and 120 min,respectively.
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