Behavior of RC members strengthened in shear with EB FRP: Assessment of models and FE simulation approaches

Ahmed Godat, Pierre Labossiére, Kenneth W. Neale, Omar Chaallal

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


Numerical analyses are performed with the ADINA finite element (FE) package to predict the behavior of beams shear-strengthened using externally bonded (EB) fiber reinforced polymers (FRPs). Nonlinear material behavior of the plain concrete, steel reinforcing bars, FRP composites and FRP/concrete interface are simulated with appropriate constitutive models. In the FE analysis, the use of truss elements versus shell elements to simulate the behavior of the FRP composites is evaluated. The influence of three types of interface element to represent the FRP/concrete interfacial behavior is examined. These elements are spring elements, discrete truss elements and continuous truss elements. The appropriate interface element is selected on the basis of the best fit of numerical predictions obtained for a predetermined set of experimental data. In order to investigate the influence of including horizontal interface elements, the interfacial response is provided parallel and perpendicular to the fiber orientation to examine the horizontal component of the principal diagonal-tension stresses. It is shown that the approach identified to represent the FRPs and the FRP/concrete interfacial behavior can significantly influence the numerical predictions of FRP shear-strengthened beams.

Original languageEnglish
Pages (from-to)269-282
Number of pages14
JournalComputers and Structures
Publication statusPublished - Feb 2012
Externally publishedYes


  • FRP/concrete interface
  • Fiber-reinforced polymer
  • Finite element modeling
  • Reinforced concrete beam
  • Shear strength
  • Strengthening

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Modelling and Simulation
  • General Materials Science
  • Mechanical Engineering
  • Computer Science Applications


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