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Title |
FEA for RC Beams Partially Flexural Reinforced with CFRP Sheets
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Authors |
김건수(Kun-Soo Kim) ; 박기태(Ki-Tae Park) ; 김병철(Byeong Cheol Kim) ; 김재환(Jaehwan Kim) ; 정규산(Kyu-San Jung) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.5.9 |
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Keywords |
탄소섬유 시트; 유한요소해석; 콘크리트 보; 구조물 보강 Carbon Fiber Reinforced Polymer Sheet; Finite Element Analysis; Reinforced Concere Beam; Structural Reinforcement |
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Abstract |
A CFRP sheet has been applied as a structural reinforcement in the field, and various studies are conducted to evaluate the effect of CFRP sheets on reinforced concrete. Although many experiments were performed from previous studies, there are still limitations to analyze structural behaviors with various parameters in experiments directly. This study shows the FEA on structural behaviors of RC beams reinforced with CFRP sheets using ABAQUS software. To simulate debonding failure of CFRP sheets which is a major failure mode of RC beam with CFRP sheets, a cohesive element was applied between the bottom surface of RC beam and CFRP sheets. Both quasi-static method and 2-D symmetric FE model technique were performed to solve nonlinear problems. Results obtained from the FE models show good agreements with experimental results. It was found that reinforcement level of CFRP sheets is closely related to structural behavior of reinforced concrete including maximum strength, initial stiffness and deflection at failure. Also, as over-reinforcement of CFRP sheets could give rise to the brittle failure of RCstructure using CFRP sheets, an appropriate measure should be required when installing CFRP sheets in the structure.
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