Studies on Mechanically Fastened Fiber-Reinforced Polymer Strengthening Systems

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Title: Studies on Mechanically Fastened Fiber-Reinforced Polymer Strengthening Systems

Author(s): Walid E. Elsayed, Usama A. Ebead, and Kenneth W. Neale

Publication: Structural Journal

Volume: 106

Issue: 1

Appears on pages(s): 49-59

Keywords: bearing-slip model; external strengthening; fiber-reinforced polymer; finite element analysis; interface

DOI: 10.14359/56283

Date: 1/1/2009

Abstract:
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.


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