• Title/Summary/Keyword: 모어서클

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Evaluation of Shear Behavior of Beams Strengthened in Shear with Carbon Fiber Reinforced Polymer with Mohr's Circle (모어써클을 활용한 탄소섬유 전단보강된 보의 전단거동 평가)

  • Kim, Yun-Gon
    • Journal of the Korea Concrete Institute
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    • v.28 no.5
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    • pp.527-534
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    • 2016
  • Beams strengthened in shear with Carbon Fiber Reinforced Polymer (CFRP) which had different transverse reinforcement ratio were tested to evaluate shear contribution in the CFRP and to analyze shear behavior of each test with Mohr's circle. Strain in the CFRP should be evaluated to estimate the shear contribution in the CFRP which is brittle material. Test results were compared each other based on the Mohr's circle which can correlate shear strain with both principal tensile strain and crack angle. With low transverse steel ratio, shear strengthening with CFRP not only increases the shear strength effectively but also minimizes the loss in shear contribution of concrete by limiting the development of crack. With high transverse steel ratio, the effect on shear strengthening with CFRP is not as much as the beam with low ratio. Therefore, the shear contribution in the CFRP should be evaluated based on the strain compatibility which can consider the interaction between steel and CFRP when determining the shear capacity of a strengthened member.