Experimental research on seismic behavior of HRB500 RC specially shaped columns

Based on the low cyclic loading experiments on four cross-shaped and four T-shaped specially shaped columns,the results in terms of damage characteristic,bearing capacity,displacement and ductility,hysteretic characteristic,rigidity degradation,energy dissipation and accumulated damage are compared.Those effects on seismic behavior of HRB500 RC specially shaped column were analyzed such as the axial compression ratio and stirrup characteristic value.With the increase of axial compression ratio,the bearing capacity of HRB500 RC specially shaped columns is bigger while the deformation capacity and ductility are worse and rigidity degradation is faster.With the increase of stirrup characteristic value,the cracking load,deformation capacity and ductility of specimens is bigger,the hysteretic characteristic is improved and the degree of accumulated damage is lightened.The conclusions of HRB500 RC specially shaped column can be references for structural design.