Finite element simulation of debonding in FRP-to-concrete bonded joints

X. Z. Lu, J. J. Jiang, Jinguang Teng, L. P. Ye

Research output: Journal article publicationJournal articleAcademic researchpeer-review

77 Citations (Scopus)

Abstract

The behaviour of reinforced concrete (RC) structures strengthened with externally bonded fibre-reinforced polymer (FRP) reinforcement in the forms of thin plates or sheets is often dominated by debonding of the FRP reinforcement from concrete. As a result, a large number of studies have addressed debonding failures in FRP-strengthened RC structures, with many of them being focussed on understanding the behaviour of simple FRP-to-concrete bonded joints in which an FRP plate/sheet is bonded to a concrete prism and is subject to a tensile force. Despite the many existing studies, there are still substantial uncertainties and difficulties with the finite element modelling of debonding failures due to the complex behaviour of cracked concrete. This paper explores the use of different crack models in modelling and compares their predictions of the debonding behaviour of FRP-to-concrete bonded joints. The results presented in this study show that a non-coaxial rotating angle crack model (RACM) is required to accurately predict this debonding behaviour. Furthermore, the debonding mechanism is also examined using results obtained with a non-co-axial RACM.
Original languageEnglish
Pages (from-to)412-424
Number of pages13
JournalConstruction and Building Materials
Volume20
Issue number6
DOIs
Publication statusPublished - 1 Jul 2006

Keywords

  • Bond
  • Composites
  • Concrete
  • Crack models
  • Debonding
  • Finite element models
  • FRP
  • Interfaces
  • Pull tests
  • Retrofit
  • Strengthening

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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