Today, in the industry, a new kind of composite columns has been introduced, known as concrete-filled steel tube pipe (CFST).In this type of columns, concrete and steel perform well and efficiently because the steel pipe creates a suitable enclosure for concrete to increase its strength and ductility, and on the other hand, the concrete prevents the internal and local buckling of the steel pipe.The main advantages of these types of columns to concrete columns are the lack of need to reinforcement and molding, construction speed, cost reduction, reduction in column dimensions, as well as increased load capacity, Ductility and energy absorption.
In this study, for the purpose of studying the effect of steel T-type stiffeners on the behavior of square-shaped steel-filled concrete, numerical modeling with the aid of Abaqus software for 10 specimen was studied.
For this purpose, a specimen of square steel columns filled concretehardened with stiffener, which had been extracted from its experimental results for modeling accuracy, was modeled.Then, the results of the modeling were compared with the experimental model and verified.
In the final section of this study, a 10 specimensteel squareshaped, concrete-filled with T-shaped stiffener, case study was performed on various parameters of square steel columns filled concrete and hardened with T-shaped cross section.Then the interaction diagram is drawn and the results are discussed.