numerical and experimental investigations of different cross-sectional configuration of plain concrete and cfst short columns under axial compression

In the present study, the finite-element (fe) and experimental analysis were carried out to understand the behaviour of the different cross-sectional configuration of plain concrete and concrete filled steel tube (cfst) short columns. a numerical model for the simulation of columns subjected to axial compression has been established using the commercial software package abaqus. the ultimate load carrying capacities of the different configuration of short columns are calculated using aci-318 code. the results estimated according to the design code are found in good agreement with the fe and measured results. it has been noticed that the ductility of the cfst column is significantly high compared to the concrete alone. the outcome of the study reveals that the circular column profiles are good geometry to be considered, since they have outstanding performance concerning of energy absorption in axial loading condition. furthermore, it has been noticed that the numerical model shows the satisfactory performance in predicting the failure modes. at the end of the study, it is recommended that the utilization of various grade of concrete layer combination of cfst columns shows a better choice from the economic point of view.