Title:
Behavior of Post-Installed Bonded Bars as Shear Reinforcement
Author(s):
Mathieu Fiset, Félix-Antoine Villemure, Josée Bastien, and Denis Mitchell
Publication:
Structural Journal
Volume:
117
Issue:
4
Appears on pages(s):
159-168
Keywords:
bond behavior; crack width; epoxy-bonded bar; modeling; shear reinforcement
DOI:
10.14359/51723522
Date:
7/1/2020
Abstract:
Post-installed epoxy-bonded shear reinforcement is a promising technique to increase shear capacity of reinforced concrete (RC) structures. However, the behavior of epoxy-bonded bars largely affects the shear strengthening efficiency. To better predict the behavior of epoxy-bonded bars, a bond model is developed in this paper. This model appears to adequately predict the behavior of epoxy-bonded bars observed in experimental pullout tests and beam loading tests. Based on numerical results, a simplified model is proposed to predict the epoxy-bonded bars’ stress according to the crack width. It appears that the behavior of long embedded bars is similar to stirrups in terms of crack width and bar stress. However, a large diagonal crack is required to reach the bar yielding strength when the bar embedment length is below a transition length, which differs from stirrups. Embedment length below the epoxy-bonded bar development length leads to pullout failure and bar capacity lower than the bar yielding strength.
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