KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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Experimental Study on Interfacial Behavior of CFRP-bonded Concrete

  • Chu, In-Yeop (KEPCO Research institute, Korea Electric Power Corporation) ;
  • Woo, Sang-Kyun (KEPCO Research institute, Korea Electric Power Corporation) ;
  • Lee, Yun (Department of Civil Engineering, College of Engineering, Daejeon University)
  • Published : 2015.09.30
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Abstract

Recently, the external bonding of carbon fiber reinforced polymer (CFRP) sheets has come to be regarded as a very effective method for strengthening of reinforced concrete structures. The behavior of CFRP-strengthened RC structure is mainly governed by the interfacial behavior, which represents the stress transfer and relative slip between concrete and the CFRP sheet. In this study, the effects of bonded length, width and concrete strength on the interfacial behavior are verified and a bond-slip model is proposed. The proposed bond-slip model has nonlinear ascending regions and exponential descending regions, facilitated by modifying the conventional bilinear bond-slip model. Finite element analysis results of interface element implemented with bond-slip model have shown good agreement with the experimental results performed in this study. It is found that the failure load and strain distribution predicted by finite element analysis with the proposed bond-slip are in good agreement with results of experiments.

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References

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