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Title |
A Review on Concrete Slabs Reinforced with Carbon Fiber Reinforced Polymer Grid
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Authors |
윤현도(Hyun-Do Yun) ; 박완신(Wan-Shin Park) ; 김선우(Sun-Woo Kim) ; 김정은(Jeong-Eun Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2023.35.2.185 |
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Keywords |
탄소섬유 보강 폴리머; 그리드; 탄성계수; 휨강성; 뚫림전단강도 CFRP; grid; modulus of elasticity; flexural rigidity; punching shear strength |
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Abstract |
This work looks at previous research on the replacement of traditional steel reinforcement with carbon fiber reinforced polymer (CFRP) grids in concrete slabs. The feasibility of using CFRP grid replacements is explored, as is a method for securing serviceability regarding deflection and cracks when applying slabs, in addition to predictive equations for punching shear strength. The analyses show that CFRP grids are a viable replacement for steel reinforcement. However, due to the lower modulus of elasticity of CFRP when compared with steel, CFRP grid-reinforced slabs exhibit significantly greater deflections, leading to greater crack widths and lengths than steel-reinforced slabs. To meet the serviceability limit of design codes, the flexural rigidity can be secured by increasing the CFRP grid reinforcement ratio or slab thickness. Following the study of predictive equations for the punching shear strength of CFRP grid-reinforced concrete slabs, based on existing design criteria, modification factors were applied to consider the modulus of elasticity of fiber reinforced polymer, such as equivalent reinforcement ratio. These modified equations improved the prediction accuracy for experimental data.
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