탄소섬유보강재로 보강한 순환골재 콘크리트보의 휨보강효과에 관한 실험적 연구Experimental Study on the Flexural Strengthening Effect of Recycled Coarse Aggregate RC Beams Strengthened with Carbon Fiber Reinforced Polymers
- Other Titles
- Experimental Study on the Flexural Strengthening Effect of Recycled Coarse Aggregate RC Beams Strengthened with Carbon Fiber Reinforced Polymers
- Authors
- 김우석; 박희만; 김봉필; 백승민; 곽윤근
- Issue Date
- 2014
- Publisher
- 대한건축학회
- Keywords
- 순환골재; 건설폐기물; 재활용; 치환율; 휨보강효과; 탄소섬유시트; 탄소섬유판; Recycled aggregate; Construction waste; Recycling; Replacement ratio; Flexural strengthening effect; Carbon fiber sheet; Carbon fiber plate
- Citation
- 대한건축학회논문집 구조계, v.30, no.7, pp.3 - 12
- Journal Title
- 대한건축학회논문집 구조계
- Volume
- 30
- Number
- 7
- Start Page
- 3
- End Page
- 12
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/2086
- DOI
- 10.5659/JAIK_SC.2014.30.7.3
- ISSN
- 1226-9107
- Abstract
- Recycled coarse aggregates (RCAs) made by construction waste can be used as concrete aggregates. Nevertheless, some studies have indicated that increasing the RCA replacement ratios of the reinforced concrete (RC) structures resulted in a decrease in failure load capacity, in strength degradation, and in severe cracking.
In this study, the use of carbon fiber reinforcement polymer (CFRP) sheets and CFRP plates in RC structures was evaluated for their effect in suppressing cracking and in adding strength to the structure.
Twelve specimens including five control beams were fabricated, using various recycled coarse aggregate substitution rates, to compare and analyze the CFRP material’s reinforcement effects. All specimens were fabricated with stirrups as simple beams with fixed span to effective depth ratio of 3.88 to 1 (i.e., a/d=3.88). The main variables studied in this investigation are (1) replacement level of recycled coarse aggregates (0, 15, 30 and 50%), (2) tensile reinforcement ratio (0.8, 1.27%), and (3) the incorporation of CFRP sheets and/or CFRP plates.
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