Post-fire resistance of internally ring stiffened high performance concrete filled steel tube columns

摘要: Abstract Use of composite construction is increasing exponentially across the world, since such structures offer combined benefits constituent materials and provide cost effective solutions. Concrete filled steel tube (CFST) columns have been proven to be a very efficient way construction. Although behaviour CFST under many different loading scenarios has well detailed, search literature revealed few studies on post-fire resistance these members. This paper gives an account internally ring stiffening with aim advancing their resistance. To this end, without internal rings were subjected standard fire exposure. address performance, exposed specimens counterparts exposure (in total 30 specimens) tested concentric compression failure. column manufactured using self-compacted high performance concrete acquire key knowledge which could exploited in highly stressed engineering structures. Experimental results indicate that proper design, are providing resistances. Some specific configurations achieved resistances greater than capacities classical Accordingly, it shown potential eliminate need for external coating or any other expensive protection measure circumvent design concerns. The findings research novel insights solutions improve ambient temperature after