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Steel and Composite Structures
  Volume 10, Number 2, April 2010, pages 187-205

Behaviors of concrete filled square steel tubes confined by carbon fiber sheets (CFS) under compression and cyclic loads
Park Jai Woo, Hong Young Kyun and Choi Sung Mo

Abstract     [Full Text]
    The existing CFT columns present the deterioration in confining effect after the yield of steel tube, local buckling and the deterioration in load capacity. If lateral load such as earthquake load is applied to CFT columns, strong shearing force and moment are generated at the lower part of the columns and local buckling appears at the column. In this study, axial compression test and beam-column test were conducted for existing CFT square column specimens and those reinforced with carbon fiber sheets (CFS). The variables for axial compression test were width-thickness ratio and the number of CFS layers and those for beamcolumn test were concrete strength and the number of CFS layers. The results of the compression test showed that local buckling was delayed and maximum load capacity improved slightly as the number of layers increased. The specimens
Key Words
    concrete filled steel tube; CFT, composite column; confining effect; carbon fiber sheet.
Park, Jai Woo: University of Seoul, Department of Architecture Engineering, Seoul, Korea
Hong, Young Kyun: Hongik University, Department of Architecture, Seoul, Korea.
Choi, Sung Mo: University of Seoul, Department of Architecture Engineering, Seoul, Korea

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