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Title |
Bond Strength of Near Surface-Mounted FRP Plate in RC Member
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Keywords |
표면매입 FRP ; 부착강도 ; 형상계수(폭-두께비) ; 부착길이 ; 무리효과 near surface-mounted FRP ; bond strength ; shape coefficient(ratio of width-thickness) ; bond length ; group effect |
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Abstract |
This paper analyzed seventy eight previous test results to evaluate bond strength of Near Surface-Mounted (NSM) FRP and prediction formulas previously proposed by researchers. The results showed that the most reliable bond strength prediction was the one proposed by Seracino, who considered the shape coefficient (ratio of width-thickness) and stiffness of FRP. However, the equation tended to underestimate the bond strength, especially serious when FRP bond length was relatively short, because the equation did not consider the effect of bond length. Based on the analysis of previous test results, the relation between bond length and bond strength and the group effect due to close proximity of FRPs were determined. Based on the findings, the Seracino’s formula was modified and it’s applicability was evaluated. The result showed that the suggested formula can be used effectively to predict the bond strength of NSM FRP.
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