CONFERENCE / REACT-2024

CFDST columns are widely used in high rise buildings, bridges, transmission tower, etc. In this study the axial and bending performance of Concrete Filled Thin-Walled Double Skin Steel Tubular columns using ANSYS software are examined. It focuses on the effects of various factors on CFDST column, such as cross-section on spiral ribs and vertical ribs. The study introduces novel column configurations with spiral stiffeners, enhancing lateral strength and buckling efficiency. Analytical results demonstrate that spiral stiffeners outperform rectilinear tie reinforcement, improving concrete confinement. CFDST columns offer benefits like reduced steel consumption, less welding, and enhanced structural effectiveness. Additionally, internal hollows accommodate utilities like electrical cables, and the sandwiched concrete layers provide substantial fire resistance. The innovative design optimization method presented in this research promises to improve structural performance for infrastructure projects. The thin-walled CFDST columns show advantages in mechanical properties, weight reduction, and steel usage. This analysis reveals a 70% reduction in steel when replacing conventional CFDST columns with thin-walled versions.