Numerical Analysis on Compressive Behaviour of Steel Concrete Confined CFST Columns

Abstract

This thesis uses numerical analysis to assess the behavior and material properties of Concrete-Filled Steel Tube (CFST) columns reinforced with enclosed steel features. This study utilizes non-linear finite element analysis with ABAQUS CAE 6.14 to predict the behavior of CFST columns, drawing ideas from Zhang et al.[1] Four specimens were simulated and subsequently subjected to axial compression in order to match the numerical models with the experimental data. In order to ensure the accuracy of the model, essential parameters such as ultimate axial strengths, axial load-strain curves, and deformation patterns were carefully matched. The study extensively examined the strength and ductility of CFST columns by several parametric studies on parameters such as the ratio of diameter to thickness, compressive strengths of concrete, and yield strengths of steel. Furthermore, the deformation of the simulated columns, which closely matched the deformations observed in the tested specimens, was examined to verify the accuracy of the numerical models in accurately predicting the structural response of CFST columns under axial stress. This thesis provides important information about the geometric and material factors that affect the performance of CFST columns as well as their structural performance