Experimental Flexural Performance of Concrete Beams Reinforced with an Innovative Hybrid Bars
Journal of Engineering Structures • 2021
Publication Information
Authors
Mohamed Said , Ali S. Shanour , T.S. Mustafa , Ahmed H. Abdel-Kareem b, Mostafa M. Khalil
Keywords
Concrete beams
Flexural performance
Hybrid reinforcement bars
Finite element analysis
Nominal flexural strength
Journal
Journal of Engineering Structures
Publisher
Elsevier
Volume
Volume 226
Issue
January 2021
Pages
111348
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
Twelve half-scale concrete beams were tested to investigate the flexural performance of concrete beams reinforced
with locally produced hybrid bars and hybrid schemes. The variables are the reinforcement bar type
(hybrid, GFRP, and steel) and the reinforcement ratios (0.85%, 1.26%, 1.70%, 1.8, and 2.13%). The test results
showed a significant enhancement in the maximum load-carrying capacity due to increasing the hybrid reinforcement
ratio. The capacities were increased by 109% and 167% respectively for hybrid reinforcement ratio of
1.26% and 1.7%. Also, the strain of reinforcing bars exceeds the yield level. Accordingly, using hybrid reinforced
bars or hybrid schemes exhibited more ductility for concrete beams. Non-linear finite element analysis (NLFEA)
was carried out using ANSYS Software. The analysis adequately reflected the trend of experimental results, the
overall average value of the ratio between experimental and NLFEA ultimate capacity is 1.01. Additionally,
parametric studies have been performed in order to investigate the effect of concrete compressive strength,
hybrid reinforcement ratio and shear-span to depth ratio on the performance of hybrid reinforcement concrete
beams. Nominal flexural strength was assessed with the experimental test results and 38 reinforced concrete
beams from the literature. The comparison proved that assessment of the nominal flexural strength performs well
in predicting the flexural capacity. The average value of the ratio between experimental and nominal flexural
strength is 1.011.
with locally produced hybrid bars and hybrid schemes. The variables are the reinforcement bar type
(hybrid, GFRP, and steel) and the reinforcement ratios (0.85%, 1.26%, 1.70%, 1.8, and 2.13%). The test results
showed a significant enhancement in the maximum load-carrying capacity due to increasing the hybrid reinforcement
ratio. The capacities were increased by 109% and 167% respectively for hybrid reinforcement ratio of
1.26% and 1.7%. Also, the strain of reinforcing bars exceeds the yield level. Accordingly, using hybrid reinforced
bars or hybrid schemes exhibited more ductility for concrete beams. Non-linear finite element analysis (NLFEA)
was carried out using ANSYS Software. The analysis adequately reflected the trend of experimental results, the
overall average value of the ratio between experimental and NLFEA ultimate capacity is 1.01. Additionally,
parametric studies have been performed in order to investigate the effect of concrete compressive strength,
hybrid reinforcement ratio and shear-span to depth ratio on the performance of hybrid reinforcement concrete
beams. Nominal flexural strength was assessed with the experimental test results and 38 reinforced concrete
beams from the literature. The comparison proved that assessment of the nominal flexural strength performs well
in predicting the flexural capacity. The average value of the ratio between experimental and nominal flexural
strength is 1.011.
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