Numerical models of reactive powder concrete（RPC）filled steel tube short column specimens are established using the finite element analysis software ABAQUS.The mechanical behavior of columns under axial compression is analyzed

and the failure patterns

load-strain curves

and ultimate bearing capacity obtained from numerical analysis are compared with experimental results.The calculated results are in good agreement with the experimental data.Stressstrain curves of the steel and RPC are analyzed

and the effects of steel strength

steel ratio

and RPC strength on the axial compression properties of columns are discussed.The results indicate that with the increasing of steel strength and steel ratio

the ultimate and residual bearing capacity and ductility of short columns are enhanced.With the increase of RPC strength

the ultimate bearing capacity is improved and the residual capacity changes slightly.Finally

the formula to calculate the bearing capacity of axially loaded short columns is established according to the limit equilibrium theory

which has a good applicability when the confinement coefficientξis between0.18 and 2.62

which could provide reference for engineering design.