Finite Element Modelling of Normal and High Strength Reinforced Concrete Square Columns

This paper deals with a numerical simulation of reinforced concrete square columns. The behavior of reinforced square columns of normal and high strength concrete was studied, and special attention paid to the concrete strength, ratio of longitudinal steel reinforcement, as well as reinforcement steel grade of this type of columns. In the present study, ABAQUS program was utilized to represent the response of this type of columns. The numerical model of finite element employs the approach of damaged plasticity for concrete. For effectiveness, a column of reinforced concrete was represented that had been comparison with experimental results that presented from the other researchers. In this research the numerical results were done for three types of loading, columns subjected to pure compressive force only (compression failure is done), columns undergo bending moment only (tension failure is done), and finally columns under axial load as well as bending moment such that the tension and compression failure is done at same moment. An interaction equation was derived in this research and can be applicable for any section of columns. The present equation was appeared a very good results when compare its interaction diagram with interaction diagram driven from previous works.