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Title |
Uniaxial Compression Behavior of Circular RC Columns Confined by Carbon Fiber Sheet Wraps
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Keywords |
탄소섬유시트 ; 구속효과 ; 일축압축실험 ; RC기둥 Carbon fiber sheet ; Confinement effect ; Uniaxial compression test ; RC column |
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Abstract |
External confinement by CFS (Carbon Fiber Sheet) is a very effective retrofit method for the reinforced concrete columns subject to either static or seismic loads. For the reliable and cost-effective design of CFS, an accurate stress-strain curve is required for CFS-confined concrete. In this paper, uniaxial compression test on short RC column with circular section was performed. To evaluate the effect of confinement on the stress-strain relationship of CFS-confined concrete, CFS area ratio, spiral area ratio, and concrete compressive strength are considered as the test variables. Experiment results indicate that CFS jacketing significantly enhances strength and ductility of concrete. In addition, the CFS-jacketed specimens with the spiral steel show the lower load increasement ratio than those without the spiral steel.
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