Research on Factors that Effect Seismic Behavior of Steel Tubular Columns Filled with Steel-reinforced Concrete
The seismic behavior of steel tubular columns filled with steel-reinforced concrete were investigated,and the influence on the seismic behavior of the columns was explored.The seismic behavior of the columns was evaluated through 5 specimens subjected to cyclic horizontal load with different axial compression ratio and steel ratio.In the experiment,the vertical load was put in top of the columns through hydraulic jack,and cyclic horizontal load was put in through horizontal jack fixed in the shear wall.Force-displacement hysteretic curves and skeleton curves were drawn on loads and displacements acquired in the experiment.Experimental results show that strength and stiffness deteriorations were reduced and the hysteretic energy dissipation capacity was increased when the steel ratio of specimens was increased.With increase in the axial compression ratio,the bearing capacity was reduced and the hysteretic energy dissipation capacity was decreased.Steel ratio and axial compression ratio are of susceptible effects on the seismic behavior of the columns.
steel tubular filled with steel-reinforced concretecolumnsseismic behavioraxial compression ratiosteel ratio
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