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http://dx.doi.org/10.12989/scs.2013.14.5.453

Structural behavior of CFRP strengthened concrete-filled steel tubes columns under axial compression loads  

Park, Jai Woo (Gayoon Construction Co., Ltd.)
Choi, Sung Mo (The University of Seoul, Department of Architecture Engineering)
Publication Information
Steel and Composite Structures / v.14, no.5, 2013 , pp. 453-472 More about this Journal
Abstract
This paper presents the structural behavior of CFRP (carbon fiber reinforced polymer) strengthened CFT (concrete-filled steel tubes) columns under axial loads. Circular and square specimens were selected to investigate the retrofitting effects of CFRP sheet on CFT columns. Test parameters are cross section of CFT, D/t (B/t) ratios, and the number of CFRP layers. The load and ductility capacities were evaluated for each specimen. Structural behavior comparisons of circular and rectangular section will be represented in the experimental result discussion section. Finally, ultimate load formula of CFRP strengthened CFT will be proposed to calculate the ultimate strength of CFRP strengthened circular CFT. The prediction values are in good agreement with the test results obtained in this study and in the literature.
Keywords
concrete-filled steel tubes (CFT); composite column; confinement effect; carbon fiber sheet; FRP;
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