Title:
Experimental Behavior of Concrete Corbels Reinforced with Glass Fiber-Reinforced Polymer Headed-End Bars
Author(s):
Matthew N. Allen and Ehab F. El-Salakawy
Publication:
Structural Journal
Volume:
121
Issue:
3
Appears on pages(s):
231-243
Keywords:
code provisions; corbel; diagonal cracking; glass fiberreinforced polymer (GFRP); headed bars; reinforced concrete (RC); secondary reinforcement; shear strength; strut-and-tie
DOI:
10.14359/51740491
Date:
5/1/2024
Abstract:
Glass fiber-reinforced polymer (GFRP) reinforcement is a proven
noncorrodible alternative to conventional steel reinforcement.
Over the past two decades, a deliberate effort has been put toward
developing a comprehensive set of design provisions, culminating
in the release of ACI CODE-440.11-22. Absent from this Code
is the strut-and-tie method commonly used in short shear-span
applications due to uncertainty in GFRP-reinforced concrete (RC)
behavior. Corbels are short shear-span, shear-controlled elements
used to transfer vertical and horizontal loads to columns or walls.
This study presents the results of 10 full-scale corbel specimens
with varying reinforcement ratios and shear span-depth ratios to
better understand the behavior of GFRP-RC corbels under monotonic loading. The results indicate that the cracking behavior,
strain development, deflection, capacity, and mode of failure are
all dependent on the presence of secondary reinforcement and the
shear span-depth ratio. The thermoplastic headed-end bars used
were found to be a viable anchorage method.
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