Effect of Shear Connector Provided at Steel-Concrete Interface on Bending Behavior of Concrete-Filled Double Skin Steel Tubular Member

Abstract

For weight reduction of CFT members, concrete-filled double skin steel tubular members, CFDT, have been developed. To ensure the composite action of CFDT members, shear connectors should be installed at the interface between steel tubes and concrete. In this study, to investigate the effect of shear connector on the bending behavior of CFDT members, four-point bending tests were carried out on CFDT and CFT members with shear connectors. The locations of the shear connectors were different for each specimen. The shear connectors were found to prevent slip between steel tubes and concrete. The maximum load of CFDT members was improved by shear connectors, particularly when placed on the inner surface of the outer steel tube.