Abstract:

In order to investigate the seismic behaviors of solid- web steel- reinforced- concrete (SSRC) cross- shaped columns,four column specimens with various axial compression ratios,steel ratios and loading directions were test- ed by low- cycle reversed loading experiments,and the crack,deformation,failure characteristics of these columns were recorded.Then,the load- displacement hysteretic curves and skeleton curves of the four columns were ob- tained,and their mechanical properties,namely,stiffness and strength degradation,displacement ductility and energy dissipation capacity,were analyzed.Finally,according to the experimental results,the effects of axial com- pression ratios,steel ratios and loading directions on the seismic behaviors of SSRC cross- shaped columns were dis- cussed.The results indicate that (1) the failure mode of the specimens with large shear span ratio is a bending fai- lure; and (2) SSRC cross- shaped columns have favorable ductility,plastic deformation capacity and energy dissi- pation capacity.In addition,as compared with lattice- style steel reinforced concrete (LSRC) cross- shaped co- lumns,SSRC cross- shaped columns show better seismic behavior.

Key words: steel reinforced concrete, cross- shaped column, solid- web steel, low- cycle reversed loading experi- ment, seismic behavior, hysteresis loops