탄소섬유 보강재로 표면매립에 의해 보강된 철근 콘크리트 보의 휨 보강성능
Flexural Capacity of Concrete Beam Strengthened with Near-Surface Mounted Carbon Fiber Reinforced Polymer
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참고문헌
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초록
This study is to investigate the flexural performance of Near Surface Mounted (NSM) strengthening method using Fiber reinforced Polymer (FRP) materials to concrete structures. For this study, the inverse-shaped trapezoid CFRP composite material which has been registered as New Excellent Technology (NET) 351 was adopted to the concrete structure. In this study, two types of the CFRP types were considered; Type A (15×13×6mm) and Type B (4×3×10mm) with different strengthening ratio. In the result of the test, it was proved that NSM strengthened specimens had more flexural performance of 20-100% than that of the unstrengthened specimen. With this test result, the structural efficiency was investigated based on the coefficient of ductility and coefficient of crack resistance.
Abstract
This study is to investigate the flexural performance of Near Surface Mounted (NSM) strengthening method using Fiber reinforced Polymer (FRP) materials to concrete structures. For this study, the inverse-shaped trapezoid CFRP composite material which has been registered as New Excellent Technology (NET) 351 was adopted to the concrete structure. In this study, two types of the CFRP types were considered; Type A (15×13×6mm) and Type B (4×3×10mm) with different strengthening ratio. In the result of the test, it was proved that NSM strengthened specimens had more flexural performance of 20-100% than that of the unstrengthened specimen. With this test result, the structural efficiency was investigated based on the coefficient of ductility and coefficient of crack resistance.
참고문헌 (6)
- 정상모, "FRP 긴장재를 이용한 콘크리트 보의 연성지수 평가", pp.237~240 (1998), 대한토목학회 학술발표회논문집(Ⅰ)
- Hassan, T, "Investigation of Concrete Structures Strengthened with Near Surface Mounted Carbon Fiber reinforced Polymer Strips", ASCE Journal of Composites for Construction, 7(3), pp.248~257 (2003)
- Lorenzis,L. D., "A modified pull-out test or bond of near- surface mojnted FRP rods in concrete", Composites part B : engineering, 33, pp.589~603 (2002)
- Lorenzis, L. D., "Near-surface mounted FRP reinforcement: An emerging technique for strengthening structures", Composites Part B: Engineering, 38(2), pp.119~143 (2007)
- Moon, D. Y., "Detailing considerations on RC beams strengthened with CFRP bars embedded in mortar overlay", Construction and Building Materials, 21, pp.1636~1646 (2007)
- Raafat E. H., "Near- Surface-Mounted Fiber-Reinforced Polymer Reinforcement for Flexural Strengthening of Concrete Structures", ACI Structural Journal, 101(5), pp.717~726 (2004)