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An Experimental Study on Bond Strength of High-Strength Reinforcing Bars with High Relative Rib Area
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 Title & Authors
An Experimental Study on Bond Strength of High-Strength Reinforcing Bars with High Relative Rib Area
Hong Geon-Ho; Choi Dong-Uk; Choi Oan-Chul; Hong Gi-Suop;
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 Abstract
The effects of bar deformation properties on bond of steel reinforcing bars to concrete are experimentally studied to predict the bond strength. Based on the previous research about high relative rib area, bond strength between reinforcing bars and concrete can be improved by the control of rib height and spacing. But, the equations in Korean code provisions to estimate development and splice length do not include these specifications of reinforcing bars. So the purpose of this paper is to determine the effect of relative rib area to the bond strength. This paper describes 2 kinds of experimental researches. Thirty beam-end specimens were tested to investigate the effects of bar size and relative rib areas ranging from 0.112 to 0.162. And, twelve lap-splice beam specimens were tested to the same variables. Each test results are normalized and compared with the proposed equations of ACI 408 committee. The results show that bond strength is increased as bar size and the relative rib area(Rr) increase. The distribution of flexural cracks and failure aspect do not appear to be affected by .
 Keywords
relative rib area;bond strength;development;lap-splice;high strength reinforcing bars;
 Language
Korean
 Cited by
1.
친환경 저수조를 위한 고밀도 폴리에틸렌과 저열성 콘크리트 합성재료 개발,장준호;

한국구조물진단유지관리공학회 논문집, 2010. vol.14. 4, pp.133-140
2.
고장력철근을 사용한 철근콘크리트 보의 겹침이음 성능평가,홍건호;

대한건축학회논문집:구조계, 2010. vol.26. 7, pp.11-18
3.
철근 마디 형상에 따른 RC 휨부재의 부착강도 평가,홍건호;김진아;최완철;

한국콘크리트학회논문집, 2011. vol.23. 3, pp.393-400 crossref(new window)
1.
Bond Strength Evaluation of RC Beams on the Rib Shape of Reinforcing Bars, Journal of the Korea Concrete Institute, 2011, 23, 3, 393  crossref(new windwow)
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