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Recommendations of Environmental Reduction Factor of FRP Rebar for Durability Design of Concrete Structure
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 Title & Authors
Recommendations of Environmental Reduction Factor of FRP Rebar for Durability Design of Concrete Structure
Park Chan-Gi; Won Jong-Pil; Kang Joo-Won;
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 Abstract
The corrosion of steel rebars has been the major cause of reinforced concrete deterioration. FRP(Fiber-reinforced polymer) rebar has emerged as one of the most promising and affordable solutions to the corrosion problems of steel reinforcement in structural concrete. However, FRP rebar is prone to deteriorate due to other degradation mechanisms than those for steel. The high alkalinity of concrete, for instance, is a possible degradation source. Therefore, the USA, Japan, Canada, UK. etc are using environmental reduction factor. Although difference design guidelines were drawn in many, including USA, Japan, Canada, UK etc, recommendations and coefficients that could take into account the long-term behavior of FRP reinforcement were not well defined. This study focuses on recommendation of environmental reduction factor of FRP rebar. Environment reduction factor were decided using durability test result. FRP rebars were subjected to twelve type of exposure conditions including alkaline solution, acid solution, salt solution and deionized water etc. The water absorption behavior was observed by means of simple gravimetric measurements and durability properties were investigated by performing tensile, compressive and short beam tests. Based on the experimental result, environmental reduction factor of hybrid FRP rebar(A), and (C) and CFRP rebar was decided as 0.85. Also, hybrid FRP rebar(B) and GFRP rebar were decided as 0.7 for the environmental reduction factor
 Keywords
alkaline;acid solution;corrosion;design guidelines;deionized water;
 Language
Korean
 Cited by
1.
콘크리트 보강용 FRP 리바의 촉진환경 노출후 인장 및 부착 특성,박찬기;원종필;

한국농공학회논문집, 2005. vol.47. 2, pp.73-84 crossref(new window)
2.
GFRP 보강근의 설계 인장강도 발현을 위한 적정 그립시스템 개발,유영찬;박지선;유영준;박영환;김금환;

한국콘크리트학회논문집, 2005. vol.17. 6, pp.947-953 crossref(new window)
3.
GFRP 보강근의 인장강도 분석을 위한 시험방법 비교 연구,유영찬;박지선;유영준;박영환;

한국콘크리트학회논문집, 2006. vol.18. 3, pp.303-312 crossref(new window)
4.
인발실험에 의한 GFRP 보강근의 정착길이 제안,최동욱;하상수;이창호;

한국콘크리트학회논문집, 2007. vol.19. 3, pp.323-331 crossref(new window)
5.
쪼갬파괴된 GFRP 하부근과 상부근의 정착길이 산정식 비교,하상수;윤준선;

한국건축시공학회지, 2009. vol.9. 6, pp.141-149 crossref(new window)
6.
GFRP 보강근의 정착길이 설계식 제안,하상수;최동욱;

한국콘크리트학회논문집, 2010. vol.22. 1, pp.131-141 crossref(new window)
7.
고무댐에 적용하기 위한 유리섬유보강 복합재료 클랩핑 플레이트의 내구 특성,이정우;박찬기;김종옥;이승기;김필식;

한국농공학회논문집, 2011. vol.53. 5, pp.17-23 crossref(new window)
8.
강섬유 혼입률과 피복두께에 따른 GFRP 보강근의 부착특성,최윤철;

한국콘크리트학회논문집, 2012. vol.24. 6, pp.761-768 crossref(new window)
9.
GFRP Rebar 보강 콘크리트 보의 급속노화환경에서의 휨 거동에 관한 연구,박연호;최열;

한국콘크리트학회논문집, 2013. vol.25. 2, pp.137-144 crossref(new window)
10.
강섬유 보강 콘크리트와 GFRP 보강근의 부착특성에 관한 실험적 연구,최윤철;

한국콘크리트학회논문집, 2013. vol.25. 5, pp.573-581 crossref(new window)
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Experimental Study on the Bond Properties between GFRP Reinforcements and Steel Fiber Reinforced Concrete, Journal of the Korea Concrete Institute, 2013, 25, 5, 573  crossref(new windwow)
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Comparison of Development Length Equation of Bottom and Top GFRP Bars with Splitting Failure, Journal of the Korea Institute of Building Construction, 2009, 9, 6, 141  crossref(new windwow)
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