ABSTRACT

The main purpose of this study is to analyze the mechanical behaviour and estimate the load bearing capacity of CFST columns under concentric compression loading conditions. The concrete filled in the steel tub was high strength concrete namely 65, 75 and 85 MPa. The steel tubes were chosen in ranging of yield strength from 433 to 511 MPa. Meanwhile, the study also investigates the distribution of axial internal forces between the concrete core and the steel tube, and estimates the increase of compression strength of the concrete core due to the confinement effects offered by the steel tube.