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Title |
Strengthening Effect of Axial Circular Concrete Members Wrapped by CFRP sheet
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Authors |
문경태(Kyoung-Tae Moon) ; 박상렬(Sang-Yeol Park) ; 김문관(Moon-Kwan Kim) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.5.010 |
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Keywords |
탄소섬유쉬트 ; 구속 ; 콘크리트 ; 최대압축강도 ; 강도추정식 ; 보강효과 ; 응력－변형률 곡선 CFRP sheet ; Confinement ; Concrete ; Maximum compressive strength ; Strength model ; Strengthening effect ; Stress-strain curve |
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Abstract |
Many studies have been carried out on carbon fiber-reinforced plastic sheet(hereafter CFRP sheet)-confined concrete specimens for improve structural performance of concrete structures. To complement the existing studies, a parametric study is conducted to examine the effect of various design parameters such as layers of CFRP sheet, size and aspect ratio of specimens, and overlap length. The behavior of CFRP-confined concrete is compared using stress-strain curves of each specimen. And the strengthening effect of CFRP sheet is examined by maximum compressive strength. As the layers of CFRP sheet increases, structural performance of CFRP-confined concrete is significant increased. If the overlap length is more than 5% of circumstance, strengthening effect is not affected. In addition, a test database assembled from test results and existing studies is presented. Using these test database, accuracy and reliability of the existing strength models for CFRP-confined concrete are verified.
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