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http://dx.doi.org/10.5762/KAIS.2017.18.11.747

Procuring the Fire Resistance Performance and Structure of Non-Refractory Coating CFT with Using the Corrugate-rib  

Lee, Dong-Oun (Division of Architecture & Civil Engineering, Dongseo University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.11, 2017 , pp. 747-754 More about this Journal
Abstract
The Concrete-Filled Tube (CFT) system was developed for its excellent structural performance, such as its good stiffness, stress and ductility, which is derived from the mechanical advantages of its composite structure. However, it is known that the flat type of reinforcing plates need stiffeners placed at a certain distance from each other to avoid buckling failure, which increases the cost accordingly. This paper investigates the contribution of the rib elements placed inside the steel tube for the purpose of increasing the bond strength between the steel and concrete and fire performance with no additional protection. The test results also demonstrate the effectiveness of the corrugated rib's shape against fire. The results of this study showed that the buckling prevention and fire resistance performance criteria were satisfied by the application of the inner surface attachment rib, due to the resulting increase in the strength of the CFT column. Therefore, it is considered that the CFT method using the corrugated rib structure reinforcement developed through this study satisfies the structural and fire resistance performance criteria without the need for a refractory coating. Future studies will be needed to make the process efficient and economical for factory production.
Keywords
Concrete-Filled in tube; Corrugate rib; Fire resistance performance; No protections; Structural performance;
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