Studies on mechanically fastened fiber-reinforced polymer strengthening systems

Walid E. Elsayed, Usama A. Ebead, Kenneth W. Neale

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)


In this paper, experimental results from 23 direct shear tests on fiber-reinforced polymer (FRP) strips mechanically fastened (MF) to concrete are reported. Based on the experimental results of one fastener FRP/concrete connection, bearing-slip models are developed to address the MF-FRP/concrete interfacial behavior. Finite element models are then presented to address the interfacial behavior between the FRP strips and the concrete substrate for both the MF-FRP/concrete direct shear specimens, as well as for MF-FRP-strengthened reinforced concrete (RC) beams. Results are presented in terms of ultimate load capacities, load-slip relationships, and strain distributions along the FRP strip. The numerical predictions are compared with experimental data, and a very good agreement is obtained.

Original languageEnglish
Pages (from-to)49-59
Number of pages11
JournalACI Structural Journal
Issue number1
Publication statusPublished - Jan 2009


  • Bearing-slip model
  • External strengthening
  • Fiber-reinforced polymer
  • Finite element analysis
  • Interface

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction


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