Plastic Deformation Capacity of Concrete filled Steel Square Tubular Columns Influence of Annealing to Steel Tube

Abstract

This paper reports the influence of annealing to cold formed steel tube on deformation capacity of concrete filled steel square tubular columns. We proposed the formula of plastic deformation capacity with axial force ratio and width-thickness ratio. By using the proposed formula of plastic deformation capacity and limit rotation angle, we confirm non-influence of annealing to steel tube on plastic deformation capacity of co ncrete steel square tubular columns.