Axial compression ratio is a critical factor which affects the structure’s ductility and resistance to progressive collapse.Through 12 specimens of T-shaped steel reinforced concrete columns under cyclic load loading test, the failure mode,hysteretic characteristics and ductility performance were investigated.The axial compression limit of T-shaped steel reinforced concrete columns was derived by the balanced failure method.The result indicated that T-shape steel reinforced concrete column possesses a good ductility performance,the specimens withλ=2.5 failed in bending, whereas the specimens of shear-span ratioλ=2.0 failed in shear compression under cyclic load.Based on the relation between the experimental and the design axial compression ratio,the axial compression ratio limit of steel reinforced concrete columns with T-shape in different seismic level was proposed,which could provide a reference for seismic design.
