COMPOSITE COLUMNS SUBJECTED TO FIRE AND STATIC LOADING, REVIEW PAPER

Abstract

Concrete Filled Steel Tubular Column (CFST) has been widely used in multi-story buildings, towers and bridges due to its exceptional structural capabilities. As a result, research into the fire behaviour of CFST columns is crucial due to the seriousness of the fire and the resulting material and human damage. This article provides a literature review with an introduction to composite columns. Next, an overview of published studies on the fire performance of concrete-filled steel tubes. This paper summarizes previous research on the mechanical properties of concrete and mild steel at high temperatures and how these properties affect the ultimate strength of the element. It was found that the yield strength of steel does not have that important effect on the fire resistance of the column, while the experimental results indicate that the fire resistance rate decreases with the increase in normal concrete strength. in addition, it was found that increasing the percentage of slenderness and the duration of the fire negatively affects the fire resistance.