A Review on Concrete Filled Steel Tube Columns Subjected to Axial Compression

Abstract

Concrete-filled steel tube (CFST) columns have emerged as a popular structural element in modern construction due to their superior load-bearing capacity and ductility under axial compression. This review paper synthesizes the existing research on the behavior of CFST columns subjected to axial compression, focusing on their mechanical properties, structural performance, and failure mechanisms. The combination of steel and concrete in CFST columns offers enhanced strength, stiffness, and energy absorption, making them suitable for high-rise buildings, bridges, and other critical infrastructure. This paper also explores the impact of various factors such as material properties, cross-sectional shapes, and slenderness ratios on the performance of CFST columns. Furthermore, the review highlights advancements in analytical models and numerical simulations that predict the behavior of CFST columns under different loading conditions. By providing a comprehensive understanding of the current state of research, this paper aims to guide future studies and practical applications in the design and optimization of CFST columns.