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Title |
Investigation for the Efficiency in Flexural Design of CFRP Bar-Reinforced Concrete Slab
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Authors |
강수태(Su-Tae Kang) ; 양은익(Eun-Ik Yang) ; 최명성(Myung-Sung Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2022.26.4.81 |
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Keywords |
일방향 슬래브; CFRP 보강근; 휨설계; 처짐; 균열폭 One-way slab; CFRP bar; Flexural design; Deflection; Crack width |
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Abstract |
In this study, for one-way concrete slabs, the flexural strength, deflection, and crack width according to the amount of reinforcing bars were compared for the cases of using steel reinforcing bars and CFRP reinforcing bars. Critical performance dominating the flexural design was investigated and how to design the CFRP-reinforced concrete slab with efficiency was also discussed. It was found that CFRP-reinforced concrete slabs could achieve greater design flexural strength with the same amount of reinforcing bars compared to those using steel rebar, while deflection and crack width were relatively much larger. In concrete slabs using CFRP reinforcing bars, it was confirmed that the maximum crack width acts as a dominant factor in the design. For more efficient flexural design, it is necessary to mitigate the allowable crack width to 0.7 mm and to apply smaller diameter reinforcing bars to control the crack width.
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