Abstract: GFRP tube filled with steel-reinforced concrete short column as a newly developed composite member named GSC column is proposed, which consists of an outer tube made from glass fiber reinforced polymer (GFRP), steel reinforcement as corn and concrete inside the tube. The axial loading tests including five GSC columns were done to investigate the mechanical properties of them. With the calculation of bearing capacity of GSC column programmed taking the percentage of steel reinforcement, GFRP tube thickness and strength of concrete as the main parameters, nine GSC members were computed to obtain the relationships between axial load and strain. The results showed that the bearing capacity of GSC columns enhances obviously with the increase of the three main parameters. The calculating formulae were thus given to the bearing capacity of GSC column, including two different methods, i.e., the simple superposition and unified theory. Both the calculation results conform well with test results.