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Computers and Concrete
  Volume 7, Number 5, October 2010 , pages 437-453
DOI: https://doi.org/10.12989/cac.2010.7.5.437
 


Nonlinear finite element analysis of effective CFRP bonding length and strain distribution along concrete-CFRP interface
Ali Baran Dogan and Ozgur Anil

 
Abstract
    CFRP has been widely used for strengthening reinforced concrete members in last decade. The strain transfer mechanism from concrete face to CFRP is a key factor for rigidity, ductility, energy dissipation and failure modes of concrete members. For these reasons, determination of the effective CFRP bonding length is the most crucial step to achieve effective and economical strengthening. In this paper, generalizations are made on effective bonding length by increasing the amount of test data. For this purpose, ANSYS software is employed, and an experimentally verified nonlinear finite element model is prepared. Special contact elements are utilized along the concrete-CFRP strip interface for investigating stress distribution, load-displacement behavior, and effective bonding length. Then results are compared with the experimental results. The finite element model found consistent results with the experimental findings.
 
Key Words
    effective CFRP length; nonlinear finite element analysis; CFRP-concrete bonding.
 
Address
Ali Baran Dogan: MITENG Engineering Inc., Eski Guvercinlik Yolu, Gazi Mah., Ankara, Turkey, 06560
Ozgur Anil: Department of Civil Engineering, Gazi University, Maltepe, Ankara, Turkey, 06570
 

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