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Title |
Experimental Study on the Bond Properties between GFRP Reinforcements and Steel Fiber Reinforced Concrete
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DOI |
https://doi.org/10.4334/JKCI.2013.25.5.573 |
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Keywords |
강섬유 ; 콘크리트 압축강도 ; 피복 두께 ; 철근의 지름 ; GFRP 보강근 ; 부착 특성 steel fiber ; compressive strength of concrete ; cover thickness ; diameter of reinforcements ; GFRP reinforcements ; bond properties |
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Abstract |
In this paper, an experimental investigation of bond properties between steel fiber reinforced concrete and glass fiber reinforced polymer reinforcements was performed. The experimental variables were diameter of reinforcements, volume fraction of steel fiber, cover thickness and compressive strength of concrete. Bond failure mainly occurred with splitting of concrete cover. Main factor for splitting of concrete is tension force occurred by the displacement difference between reinforcements and concrete. Therefore, in order to prevent the bond failure between reinforcements and concrete, capacity of tensile strength of concrete cover should be upgraded. As a results of test, volume fraction of steel fiber significantly increases the bond strength. Cover thickness changes the failure mode. Diameter of reinforcements also changes the failure mode. Generally, diameter of reinforcement also affects the bond properties but this effect is not significant as volume fraction of fiber. Increase of compressive strength increases the bond strength between concrete and reinforcement because compressive strength of concrete directly affects the tensile strength of concrete.
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