Fracture criterion for carbon fiber reinforced polymer sheet to concrete interface subjected to coupled pull-out and push-off actions

Jianguo Dai, Bao Lin Wan, Hiroshi Yokota, Tamon Ueda

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


Flexural strengthening of reinforced concrete (RC) beams using externally bonded fiber reinforced polymer (FRP) sheet is a popular application nowadays. In this application, the FRP to concrete bond interface is typically exposed to a mixed- mode loading condition at the vicinity of a critical flexural/shear crack, which includes a pull-out action parallel to the interface and introduced by the opening displacement of the flexural/shear crack together with a push-off action perpendicular to the interface and introduced by the shear sliding displacement of the flexural/shear crack. This paper presents an experimental program to evaluate the fracture properties of the FRP to concrete interface under the coupled pull-out (mode II) and push-off (mode I) loading condition. An analytical model was developed to evaluate the mode I and mode II strain energy release rates and the corresponding fracture mechanisms of the FRP to concrete interface under a pure bending action, a pure dowel action, and the coupled action of both, respectively. The reliability of the proposed analytical model was verified in comparison with the experimental results.
Original languageEnglish
Pages (from-to)663-682
Number of pages20
JournalAdvances in Structural Engineering
Issue number5
Publication statusPublished - 1 Oct 2009


  • Concrete
  • Critical strain energy release rate
  • Fiber reinforced polymer
  • Fracture criterion
  • Interface
  • Mixed-mode
  • Mode I
  • Mode II

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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