Experimental Research on Seismic Performance of Steel Reinforced Concrete Columns Under Combined Torsion
In order to study the seismic performance of H-shaped steel reinforced concrete columns under combined compression,bending,shear and torsion loads,a quasi-static test was carried out on 7 H-shaped steel reinforced concrete columns and 1 reinforced concrete column to explore the effects of torsion-bending ratio,axial compression ratio and stirrup ratio on the seismic behavior of specimens.In this paper,the regularity and failure characteristics of cracks in column specimens during low-cycle reversed loading test are analyzed,and the torque-torsion hysteresis curves,skeleton curves,energy dissipation capacity,ductility,stiffness degradation and damage analysis of specimens are discussed.The results show that the H-shaped steel reinforced concrete column is torsional failure under combined stress and its torque-torsion hysteresis curve presents an S shape.However,compared with common reinforced concrete specimens,its bearing capacity and seismic performance are better.Increasing the torsion-bending ratio,axial compression ratio,stirrup ratio and welding with stirrups and configuring bolts can increase the load-bearing capacity of specimens,but increasing the stirrup ratio and configuring bolts will accelerate the stiffness degradation rate of specimens.
万方数据
维普
