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Title |
Experimental Study on Compressive Strength of Concrete Column Retrofitted by Carbon FRP Sheet
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Authors |
유연종 ; 이경훈 ; 김희철 ; 이영학 ; 홍원기 |
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Keywords |
탄소섬유시트 ; 구속효과 ; 압축강도실험 Carbon fiber sheet ; Confinement effect ; Compressive strength test |
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Abstract |
In 1980 and 1990’s most of residential buildings were constructed with relatively low strength concrete of 18 ㎫. And, columns were designed considering only vertical loads. In this study, compressive strength tests for low strength RC columns retrofitted by carbon fiber sheets were carried out. Carbon fiber sheet provides constructability and high tensile strength as well as good corrosion resistance characteristics. A pair of carbon sheets were wrapped with ±60° angle with respect to longitudinal direction of RC column to increase structural capacity against axial and lateral load simultaneously. Strength and strain patterns and failure modes of specimens were analyzed and prediction equation of increased compressive strength of RC column confined by carbon fiber sheet was proposed based on regression analysis.
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