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Title |
Performance of Reinforced Concrete Beams Strengthened with Bi-directional CFRP Strips
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DOI |
https://doi.org/10.11112/jksmi.2018.22.6.030 |
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Keywords |
이 방향 레이아웃 ; 탄소섬유 보강 ; 전단보강 ; 전단 보강 시점 Bi-directional layout ; CFRP strengthening ; shear strengthening ; shear strengthening point |
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Abstract |
Researches on strengthening and rehabilitation are important since structural capacity is degraded by deterioration or damage of structural members. An effective strengthening scheme such as an externally bonded Carbon Fiber Reinforced Polymers (CFRP) can improve the structural performance of a concrete structure in a cost-effective way. Therefore, many experimental studies on strengthening methods have been widely carried out. In regards to the shear strengthening of a concrete beam, variables of the experimental studies were the amount of CFRP, the angle of the strip, the width of the strip, and the interaction between the materials. However, there are insufficient researches on bi-directional CFRP layout compared to the previous researches. In this study, a total of ten concrete beams were designed and tested to evaluate the shear strengthening effect using CFRP strips. The effectiveness of strengthening was investigated based on the shear contribution of materials, strain distribution of stirrup, and the maximum shear capacity of specimens.
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