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Title |
Evaluation of Bond Strength of Deformed Bars in Pull-out Specimens Depending on Stirrups Spacing, Rebar diameter and Corrosion Rate
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Authors |
지성우(Seong-Woo Ji) ; 정호성(Hoseong Jeong) ; 윤차영(Cha-Young Yoon) ; 이재연(Jae-Yeon Lee) ; 김강수(Kang Su Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.3.47 |
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Keywords |
인발실험; 스터럽 보강효과; 부식률; 부착강도; 회귀모형 Pull-out test; Effect of stirrups; Corrosion rate; Bond strength; Regression model |
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Abstract |
In this study, pull-out tests were performed to investigate the effects of stirrup spacing, rebar diameter, and corrosion rate on bond strength of deformed bars in reinforced concrete. Twelve pull-out specimens with different stirrup spacing, rebar diameter, and corrosion rate were prepared following the RILEM RC6 guidelines. The test results showed that the bond strength of specimens with stirrups increased when the corrosion rate was less than 3%, whereas it decreased when the corrosion rate was more than 3%. On the other hand, the bond strength of specimens without stirrups decreased as the corrosion rate increased. The effect of rebar diameter was less significant compared to those of stirrup spacing and corrosion rate. A bond strength model for pull-out specimens was proposed considering stirrup ratio and corrosion rate, and the model showed the lowest error among the previous models.
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