Title:
Evaluating Behavior of Shear-Critical Glass Fiber- Reinforced Polymer-Reinforced Concrete Beams
Author(s):
Jahanzaib and Shamim A. Sheikh
Publication:
Structural Journal
Volume:
120
Issue:
6
Appears on pages(s):
181-192
Keywords:
code provisions; glass fiber-reinforced polymer (GFRP); shear capacity; thermal conditioning
DOI:
10.14359/51739095
Date:
11/1/2023
Abstract:
Two shear-critical beams completely reinforced with glass
fiber-reinforced polymer (GFRP) bars were constructed and
tested in the current study. One beam was tested at room temperature and the second beam was subjected to accelerated thermal conditioning to simulate long-term behavior of GFRP-reinforced concrete (RC) beams, considering the recent climate challenges leading to increasing temperatures across the world. Conditioning of the beam was carried out at 50°C (122°F) for 4 months under 60% relative humidity while subjected to sustained load throughout the conditioning period. No significant change in
behavior was observed because of the conditioning. Additionally,
available models including code provisions (CSA S806, CSA S6,
and ACI 440.1R) to estimate the shear strength of shear-critical
beams were critically evaluated and discussed. It was noticed
that the inclusion of a second-order equation to predict the shear
contribution from concrete (Vc) seemed to improve the accuracy of
the predictions.