Finite Element Analysis of Concrete Filled Circular Steel Tube Short Columns Subjected to Axial Compression Load

This paper summarizes the findings of a study aimed at enhancing the understanding of the fundamental performance of short circular columns constructed from steel tubes filled with concrete.This study presents a three-dimensional finite element model utilizing the ANSYS2023R1 software to analyze columns from steel tubes filled with concrete, assess performance enhancement, and examine the impact of critical parameter, including the concrete strength, the steel tube strength, the steel tube diameter-to-thickness percentage, and the slenderness percentage of the column.A 3D brick element eight-node SOLID 65 was used to depict the concrete, while a 3D solid element SOLID 185 was applied to represent the steel tube.The verification study indicates a strong correlation between the ANSYS simulations and the experimental test outcomes.The findings of the parametric analysis reveal that material and geometric characteristics greatly influence the axial strength of concrete filled steel tube (CFST) columns.Increasing the compressive strength of concrete and the yield strength of steel enhances the ultimate load.A rise in D/t percentage and L/D percentage leads to reductions in the ultimate load.