CONFERENCE / REACT-2024

In modern construction use of composite sections such as CFST columns was improved because of their numerous benefits in construction processes. In this study, a novel stiffening scheme was proposed to use with unstiffened CFST column. The stiffening scheme is named as diagonal stiffeners which comprises diagonal stiffeners attached at diagonally opposite ends of steel tube. The stiffeners can be provided in three formats viz, binary, tertiary, and quaternary arrangement. In this paper the response of diagonal stiffeners CFST columns under axial compression was investigated through experimental program Additionally, to assess the performance of the proposed stiffener arrangement, a finite element model were developed using ANSYS software and validated against experimental results. The study's findingsdemonstrated that, compared to unstiffened CFST sections, CFST columns strengthenedwith the suggested stiffening arrangements had an ultimate load capacity that was roughly 20% higher. The column section's strength increased and the local buckling of the exterior steel casing was removed. It was concluded that stiffened CFST columns improved the composite interaction between the infill concrete and the outer steel casingand provided better confining pressure on the concrete.