Flexural Behavior of High-Strength Reinforced Concrete Beam with Recycled Aggregate Strengthened by FRP Plate
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
As means to increase the use of concrete with recycled coarse aggregate (RCA), this study aims to evaluate the applicability for flexural strengthening of reinforced concrete beam with high-strength concretes and RCA on which FRP plates, used for repair and strengthening of old and low-durability reinforced concrete structures, is applied. In order to increase the adhesive force of epoxy and FRP plate, FRP plate was installed according to Near-Surface-Mounted (NSM) method. 12 specimens were manufactured using substitution rate of RCA (30%), concrete strengths (40MPa, 60MPa), diameters of deformed bar (D10, D13), and types of FRP plate (AFRP, CFRP) as variables to analyse flexural performance according to FRP plate and substitution rate of recycled aggregate. As a result, in all specimens, specimens strengthened by FRP plate showed a maximum of 17% increase in performance compared to specimens without FRP plate and strengthening performance of CFRP was found to be higher than AFRP. When modulus of rupture was used, the value of cracking moment was similar to that of the reference equation. As bending moment of some specimens strengthened by FRP plate failed to satisfy the criteria of KCI 2012 and ACI 440-2R, additional experiment is deemed as necessary.
Abstract
As means to increase the use of concrete with recycled coarse aggregate (RCA), this study aims to evaluate the applicability for flexural strengthening of reinforced concrete beam with high-strength concretes and RCA on which FRP plates, used for repair and strengthening of old and low-durability reinforced concrete structures, is applied. In order to increase the adhesive force of epoxy and FRP plate, FRP plate was installed according to Near-Surface-Mounted (NSM) method. 12 specimens were manufactured using substitution rate of RCA (30%), concrete strengths (40MPa, 60MPa), diameters of deformed bar (D10, D13), and types of FRP plate (AFRP, CFRP) as variables to analyse flexural performance according to FRP plate and substitution rate of recycled aggregate. As a result, in all specimens, specimens strengthened by FRP plate showed a maximum of 17% increase in performance compared to specimens without FRP plate and strengthening performance of CFRP was found to be higher than AFRP. When modulus of rupture was used, the value of cracking moment was similar to that of the reference equation. As bending moment of some specimens strengthened by FRP plate failed to satisfy the criteria of KCI 2012 and ACI 440-2R, additional experiment is deemed as necessary.
참고문헌 (15)
- A. Nami, "FRP Reinforcement for Bridge Structures, Proceedings, Structural Engineering Conference Beams", Journal of Composites for Construction, 5(1), pp.12~17 (2010)
- ACI Committee 440, Guide for the Design and Construction of Concrete Reinforced with FRP Bars. (ACI440.2R-02), , American Concrete Institute, 41~ (2002)
- 임동환, "표면매입 탄소섬유판으로 보강된 철근콘크리트 부재의 휨 거동에 관한 실험연구", 한국구조물진단유지관리공학회 논문집, 12(6), pp.89~96 (2008), 한국구조물진단유지관리공학회
- D. J. Oehlers, R. Rashid., "IC debonding resistance of group of FRP NSM strips in reinforced concrete beams" (2007), ELSEVIER
- I. Maruyma, M. Sogo, T. Sogabe, R. Sato., "Flexural Properties of Reinforced Recycled Concrete Beams", Proceedings RILENM Symp. International RILEM Conference on the Use of Recycled Materials in Buildings and Structures, pp.525~535 (2004)
- J. R. Yost, "Flexural Behavior of Concrete Beams Strengthened with Near-Surface Mounted CFRP Strips", ACI Structural Journal, 104(4), pp.430~437 (2007)
- L. De Lorenzis., "Near-surface mounted FRP reinforcement: An emerging technique for strengthening structures", Composite Part B, 38, pp.119~143 (2007)[DOI]
- L. De Lorenzis, A. Nanni., "Flexural and Shear Strengthening of Reinforced Concrete Structures with Near Surface Mounted FRP Rods", Proceedings ACMBS III Symp. The 3rd International Conference on Advanced Composite Materials in Bridges and Structures (ACMBS III), pp.521~528 (2000)
- Ministry of Environment, "Construction Waste Recycling Promotion Act" (2010)
- R. EI-Hacha., "Near-Surface-Mounted Fiber-Reinforced Polymer Reinforcements for Flexural Strengthening of concrete Structures", ACI Structural Journal, 101(5), pp.717~726 (2004)
- R. Seracino, "Generic intermediate crack debonding resistance of EB and NSM plate-to-concrete joints", Composite Construction Journal, 11(1), pp.62~70 (2007)[DOI]
- 송선화, "순환골재를 사용한 철근콘크리트 보의 휨거동 특성", 콘크리트학회 논문집, 21(4), pp.431~439 (2009), 한국콘크리트학회
- S. Rizkalla., "Near-Surface-Fiber-Reinforced Polymer Reinforcements for Flexural Strengthening of Concrete Structures", ACI Structural Journal, 101(5), pp.717~726 (2004)
- 서수연, "FRP 판으로 표면매입 보강된 철근콘크리트 보의 보강성능", 한국구조물진단유지관리공학회 논문집, 16(1), pp.18~26 (2012), 한국구조물진단유지관리공학회
- 이용택, "순환굵은골재 치환율에 따른 고강도 철근콘크리트 보의 휨 거동", 한국구조물진단유지관리공학회 논문집, 18(1), pp.1~9 (2014), 한국구조물진단유지관리공학회[DOI]