This paper presents a numerical study of the various steel tube sections of Concrete Filled steel Tube (CFT) columns under axial, eccentric and lateral cyclic loading based on the Ansys standard solver. The feasibility and accuracy of the numerical method was verified by comparing the numerical results with the experimental observations. Because of inconvenient performance of traditional CFT columns, new steel wall sections proposed in the current study to improve the strength and hysteresis behavior of these columns. For this purpose, eight CFT samples, including two polygons soffit sections, two polygons extrados sections, square section, circular section, circular section with reinforced bars, and octagon section with stiffeners proposed for the analyses. The results of analyses indicate the increase in strength and ductility of the suggested sections in comparison with traditional ones and they can be used in the seismic region and practical engineering applications.
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