Analysis of steel-reinforced concrete-filled-steel tubular (SRCFST) columns under cyclic loading

A new form of composite column, steel reinforced-concrete filled-steel tubular column (SRCFST) has been proposed to undertake higher loads. This contribution presents a numerical study of cyclically loaded SRCFST columns based on the ABAQUS standard solver. The feasibility and accuracy of the numerical method was verified by comparing the calculated results with the experimental observations. The lateral displacement–load curves and sectional stress distributions were analyzed. The results indicate that the SRCFST columns have higher specimen stiffness, peak lateral load and deformability than common concrete filled steel tubular (CFST) columns due to the presence of the section steel. A parametric study, including influence of axial load levels, ratio of section steel, yield strength of section steel, concrete strength and thickness of steel tube on peak lateral load was also carried out.