AFRP rebar로 보강된 콘크리트 깊은보의 전단강도
Shear Strength of Concrete Deep Beam Reinforced AFRP rebar
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초록
본 연구는 아라미드 섬유 보강 폴리머(Aramid Fiber Reinforced Polymers, 이하 AFRP)rebar로 보강된 콘크리트 깊은보의 전단강도를 평가하기 위하여 전단경간비, 보강비, 유효깊이, 주근을 변수로 총 8본의 시험체에 대한 전단 실험을 수행하였다. ACI 318-08의 스트럿-타이 모델(이하 STM)을 이용한 전단강도와 아치작용을 고려한 제안식에 의한 전단강도를 비교·평가하였으며, 그 결과 AFRP rebar로 보강한 경우, Steel rebar로 보강한 경우보다 전단강도가 증가하는 것으로 나타났다. 전단강도 산정에 있어 ACI 318-08 STM을 이용한 해석이 상대적으로 정확했으며, 실험결과를 토대로 스트럿의 크기효과를 고려한 유효압축강도 산정 모델을 제안하였다. 이를 본 실험에 적용시킨 결과 기존 기준 및 제안식을 이용한 전단강도 산정방법보다 합리적인 결과를 얻을 수 있었다.
Abstract
This study carried out a shear experiment on concrete deep beam reinforced AFRP to investigate the shear strength of deep beam. The test was conducted on 8 specimens, and the variables were shear span ratio, reinforcement ratio, effective depth, and rebar type. We compared shear strength using ACI 318-08 STM with proposed equations that considered arching action according to shear span ratio. As a result, it was found that shear strength of deep beam reinforced AFRP rebar presented higher shear strength than steel rebar. ACI STM`s predictions are more accurate than other predicting equations, and thus this research proposed model versus effective compressive strength of the concrete strut that considered strut size effect based on test results. The predictions obtained using the proposed model are in better agreement than previous equations and codes.
참고문헌 (13)
- Razaqpur, A. G, "Concrete contribution to the shear resistance of fiber reinforced polymer reinforced concrete members", Journal of Composites for Construction, 8(5), pp.452~460 (2004)
- Razaqpur, A. G, "Proposed shear design method for FRP-reinforced concrete members without stirrups", ACI Structural Journal, 103(1), pp.93~102 (2006)
- El-Sayed, A. K, "Shear strength of FRP-reinforced concrete beams without transverse reinforcement", ACI Structural Journal, 103(2), pp.235~243 (2006)
- El-Sayed, A. K, "Shear capacity of high-strength concrete beams reinforced with FRP bars", ACI Structural Journal, 103(3), pp.383~389 (2006)
- Tureyen,A.K., "Shear tests of FRP-reinforced concrete beams without stirrups", ACI Structural Journal, 99(4), pp.427~434 (2002)
- Tureyen,A.K., "Concrete shear strength:another perspective", ACI Structural Journal, 100(5), pp.609~615 (2003)
- "ACI Committee 318, “Building code requirements for structural concrete (318-08) and commentary (318R-08),”American Concrete Institute, Farmington Hills, Michigan", ~ (2008)
- "ACI Committee 440, “Guide for the design and construction of concrete reinforced with FRP bars (440.1R-06),” American Concrete Institute, Farmington Hills, Michigan", ~ (2006)
- Omeman,Z, "Experimental study on shear behavior of carbon-fiber-reinforced polymer reinforced concrete short beams without web reinforcement", Canadian Journal of Civil Engineering, 35(1), pp.1~10 (2008)
- Nehdi,M., "Optimal efficiency factor in strut-tie model for FRP-reinforced concrete short beams with (1.5<a", d<2.5), 2008, pp.41(10), 1713~1727
- Japan Society of Civil Engineers, "Recommendations for design and construction of concrete structures using continuous fiber reinforced materials" (1997), Research Committee on Continuous Fibre Reinforced Materials
- CSA S806-02, "Design and construction of building components with fibre reinforcement polymers" (2002), Canadian Standard Association
- 콘크리트 강도 공시체의 크기효과, "대한토목학회지", 1987, 112~114