Finite Element Analysis of Concrete-Filled Steel Tube Columns Under Uniaxial and Biaxial Loading Using ABAQUS

Abstract

This research examines the structural behaviour of Concrete-Filled Steel Tubular (CFST) columns under axial, uniaxial, and biaxial loading conditions through Finite Element Analysis (FEA). Two different column configurations—long and short columns are modelled using ABAQUS/CAE 6.14, which allows for detailed simulations of stress distribution, failure modes, and load-displacement characteristics. The study specifically focuses on understanding how column geometry and the type of loading influence the structural performance and stability of CFST columns. Key findings from the analysis indicate that biaxial loading generates the highest stress concentrations and leads to greater instability compared to axial and uniaxial loading scenarios. In contrast, axial loading provides more stable performance and better resistance to deformation. The research also offers valuable design recommendations for improving the strength and resilience of CFST columns in practical applications. Lastly, future research directions are proposed to further optimize the design and enhance the performance of CFST columns under various loading conditions.