Experimental Study on the Method of Improving Seismic Performance of Concrete Filled Square Steel Tubular Columns

Abstract

Authors have devised a method of improving seismic performance of concrete filled square steel tubular columns. In this method circular steel tubes are embedded in infilled concrete to confine the inner concrete. In order to verify the efficiency of this method, experimental investigations were conducted. Alternately reversed cyclic shear-bending tests under constant axial load had been carried out for the columns reinforced by embedded circular steel tubes and non-reinforced columns. In this paper the test results are described and discussed.