The impact of stirrups on the composite action of concrete-filled steel tubular stub columns under axial loading

Abstract

In view of lacking in-depth study on the influence of stirrups on the confinement action of stirrup-confined concrete-filled steel tubular (CFT) stub columns, this paper takes concrete-filled round-end and rectangular weathering steel tubular (FWST) stub columns as research objects, and carries out 8 experimental studies on FWST stub columns under axial loading. The results indicated that the basic mechanical properties of FWST stub columns were similar to those of CFT stub columns. Besides, studies on parametric analysis and composite action among steel tube, stirrups and the core concrete have been carried out using FE modelling which had been verified using the test data. The analysis sho..