Axial compressive behavior and design of confined concrete-filled stiffened steel tubular short columns
Oral Presentation
Paper ID : 1191-ICASGE
Authors
1Professor, Civil Engineering Department, Faculty of Engineering, Tanta University & Horus University, Tanta, Egypt,
2Ph.D. Candidate, Civil Engineering Department, Faculty of Engineering, Port Said University, Port Said, Egypt,
3Professor, Civil Engineering Department, Faculty of Engineering, Port Said University, Port Said, Egypt
Abstract
The axial compressive performance and design of square confined concrete-filled cold-formed stiffened steel tubular (CFSST) short columns, confined with Perfobond Leister (PBL) plates were investigated in this study. A numerical analysis using software ABAQUS is employed to analyze the ultimate strength of the generated composite columns, focusing on effect of PBL plates and internal angles on load-bearing capacity and concrete confinement. A parametric analysis was performed on 53 CFSST columns, including different thickness of steel, strength of infill concrete, and outer cross-sectional dimensions. Results show that the inclusion of PBL plates improves the axial compressive capacity by enhancing concrete confinement and reducing lateral expansion. The study also compares the ultimate axial resistances derived from numerical analyses with design provisions from EC4, BS5400, and DBJ 13-15 codes, demonstrating that the DBJ 13-15 code provides the closest predictions to numerical results. These findings suggest that PBL-confined cold-formed CFST columns offer a promising solution for structural applications requiring enhanced performance under axial compression.
Keywords