Materials and Structures

, Volume 38, Issue 1, pp 11–16 | Cite as

Appraisal of the novel single contoured-cantilever beam

  • D. M. Boyajian
  • J. F. Davalos
  • I. Ray
Scientific Reports


Research in the areas of rehabilitation and/or strengthening of concrete structures is currently focused on the external bonding of fiber reinforced polymer (FRP) plates or fabrics. A concern, however, exists with the long-term reliable performance of the interface bond that is centrally critical to the successful application of this technology. Traditionally, interface studies of the wood-adhesive bond, as an example, had effectively been accomplished using the well-established fracture mechanics double cantilever beam (DCB) approach, which, unfortunately, could not be extended to investigating FRP-concrete interfaces because of the inherent weakness of the concrete material under tension. In order to overcome such a hindrance, the authors devised a novel fracture mechanics specimen known as the single contoured-cantilever beam (SCCB), and have used it to successfully characterize the FRP-concrete interface bond under pristine, dry, wet-dry, and freeze-thaw conditions. This paper attempts to both summarize the relevancy of this new test methodology and appraise its viability as an indispensable fracture mechanics tool for FRP-concrete interface bond characterization.


Fracture Toughness Crack Opening Displacement Fiber Reinforce Polymer Linear Elastic Fracture Mechanic Adhesive Joint 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Les recherches dans le domaine de la réhabilitation et/ou du renforcement de structures en béton sont actuellement concentrées sur l'attachement extérieur de plaques ou bandes de ruban fabriquées à base de fibres de polymère (Fiber Reinforced Polymer, FRP). Cependant, la fiabilité à long terme du lien entre les deux matériaux est l'élément critique pour une utilisation efficace de cette technique. Jusqu'à présent, les études, menées à titre d'exemple, sur le lien entre bois et adhésif, sont fondées sur la méthode de la double poutre encastrée de la mécanique de la rupture (Double Cantilever Beam, DCB), méthode, qui malheureusement ne peut pas être extrapolée pour l'étude du lien entre béton et fibres de polymère, à cause de la faible résistance du béton à la tension. Dans le but de résoudre ce problème, les auteurs ont développé une nouvelle méthode, basée sur la mécanique de la rupture, connue comme la méthode de la poutre encastrée à simple contour (Single Contoured-Cantilever Beam, SCCB) et l'ont utilisée avec succès pour modéliser le lien entre béton et fibres de polymère sous différentes conditions: conditions originales, humides-sèches et sous cycle de gel-dégel. Cet article montre la pertinence de cette nouvelle méthode et évalue sa viabilité comme outil indispensable de la mécanique de la rupture pour la modélisation du lien entre béton et fibres de polymère.


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Copyright information

© RILEM 2004

Authors and Affiliations

  • D. M. Boyajian
    • 1
  • J. F. Davalos
    • 2
  • I. Ray
    • 2
  1. 1.Department of Civil EngineeringThe University of North Carolina at CharlotteCharlotteUSA
  2. 2.Department of Civil and Environmental EngineeringWest Virginia UniversityMorgantownUSA

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