Abstract : Composite construction is now well-recognized in the building industry for its aesthetically pleasing, high strengths and cost-effective properties. In structural engineering, composite construction exists when two different materials were bound to act as a single unit employing composite action. Columns are vertically oriented structural components that primarily carry compression load. The columns formed from single steel skin with concrete placed inside are considered composite columns. The present research aims to validate composite columns of circular tubular sections cast with various grades of concrete such as M25, M35, M45 and M60. The steel tubes considered in this study are of grades Fe350, Fe415 and Fe500. The circular sections are of the following dimensions, 167mm in diameter and 350mm in length. The thickness was varied as 2.5, 3.1 and 3.6mm to also study the effect of diameter to thickness ratio. Abaqus 6.14 was used in the current investigation to analyse and validate the test specimen results which are available in the literature [1]. The behavior of concrete-filled composite tubular columns cast with various grades of concrete was briefly addressed and assessed in the current research work using FEA (Finite Element Analysis).