Cohesive Interface Modeling of Debonding Failure in FRP Strengthened Beams

A theoretical model that incorporates the concept of the cohesive interface approach for debonding analysis of reinforced concrete beams strengthened with externally bonded fiber reinforced polymer (FRP) strips is presented. The cohesive interface concept is adopted for modeling the debonding process near the critical adhesive-concrete interface, whereas the adhesive layer itself is modeled as a 2-D elastic medium. Thus, the stress and deformation fields within the adhesive layer, the coupling between the shear and normal stresses and, especially, their influence on the tractions across the cohesive interface are considered. The nonlinear relations between the tractions and displacement jumps across the cohesive interface are derived using a potential function and account for the peeling effects and for the coupling between the shear-slip and the peeling-separation laws. Numerical results that examine the capabilities of the model provide insight into the stability characteristics of the debonding mechanism, and highlight some aspects of the debonding problem. Conclusions are also provided.

  • Availability:
  • Supplemental Notes:
    • Abstract reprinted with permission from ASCE
  • Authors:
    • Rabinovitch, Oded
  • Publication Date: 2008-7

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01104212
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 14 2008 4:46PM