Abstract: “This paper investigates the contribution of rib elements attached inner side of CFT for higher bond strength between steel tube and concrete and fire performance with no protections. Test results also present the work of beam’ s shape to fire resistance, the microstructure of concrete and the benefit of a paper drain that can be letting the redundant water out through the holes drilled on the tube plate. Discussions on beam’s design could be followed after some more fire tests accordingly conducted within this investigation.”

Keywords: CFT column, tube plate, fire resistance, structure, durability