Abstract：Based on a bounding surface model of the concrete and elastic-plasticity constitutive relations of steel, the finite element model of the self-stressing concrete filled steel tube short column is established and the mechanical performance is analyzed.The calculated results is consistence with test results.The results indicate that the self-stressing concrete-filled steel tube short column has higher carrying capacity than common concrete-filled steel tube short column due to self-stress.The carrying capacity of self-stressing concrete-filled steel tube short column increases with increasing self-stress.Steel ratio of the specimen is the principal factor which affects the shape of the load-strain curve.

Keyword：self-stressing;concrete filled steel tube;finite element model;short column under axial load;carrying capacity;