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http://dx.doi.org/10.5000/EESK.2008.12.3.029

Flexural Strength Design Equation of Concrete Filled Steel Tube(CFT) Column Reinforced by Carbon Fiber Sheet  

Park, Jai-Woo (홍익대학교 건축학과)
Hong, Young-Kyun (홍익대학교 건축학과)
Hong, Gi-Soup (홍익대학교 건축학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.12, no.3, 2008 , pp. 29-36 More about this Journal
Abstract
The TR-CFT(Transversely Reinforced Concrete Filled Steel Tube) column is proposed to control or at least delay the state of local buckling at the critical section by wrapping the CFT columns with a carbon fiber sheet. In this study, an equation to determine the flexural strength of TR-CFT is proposed. The ACI-318 code, in which the contribution of the confining effect in the concrete filled steel tube is not appropriately accounted for, may be conservative. Therefore, flexural strength design equations for CFT columns and TR-CFT columns are proposed based on the concrete strain-stress curve, which contributes to the confining effect. Finally, the predicted results for the CFT and TR-CFT columns are shown to be in good agreement with actual test results.
Keywords
concrete filled steel tube; CFT; TR-CFT; composite column; confining effect;
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