Abstract
A procedure for obtaining the interaction diagrams of slender concrete-filled steel tube (CFT) columns exposed to fire was presented. The maximum structural capacity represented by the interaction diagram of the short column was determined via mathematical optimization. The interaction diagram of the slender column with the slenderness effect was obtained using a moment magnifier, which is defined by an effective flexural rigidity. After investigating fire resistances from the developed procedure and experiments of 78 slender CFT columns, the participating factors of 0.2 and 0.8 for concrete and steel, respectively, were proposed for the effective flexural rigidity. The applicability and versatility of the developed analysis procedure were demonstrated using the interaction diagrams of CFT and steel-reinforced concrete-filled steel tube columns exposed to fire.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
