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.