Study Effect of Depth for Concrete Filled Steel Tubular Columns under Axial Load

The main purpose of this research is to study the effect of length on the CFT columns analytical using the finite element FE method. ANSYS software is employed to evaluate the CFT columns behavior. 3-D finite element models are presented and calibrated successfully to predict the CFT columns performance under axial static loading. A parametric study was conducted to evaluate the performance of CFT columns that examines the effect of all the dimensions of the CFT columns on the columns performance. The study considers varying the geometrical of the CFT columns, such as column width-to-thickness ratio and column length-to-width. The test results showed that increasing the slenderness ratio L/B has a negligible effect on the load capacity of the column but is accompanied by a large reduction of its ductility.