Evaluation of Flexural Behavior and Serviceability Performance of Concrete Beams Reinforced with FRP Bars

Kassem, Chakib; Farghaly, Ahmed Sabry; Benmokrane, Brahim

doi:10.1061/(asce)cc.1943-5614.0000216

Cited by 184 publications

(66 citation statements)

References 11 publications

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“…The slope, however, increases as the amount of reinforcement increases. These findings seem to be consistent with the results obtained in FRPreinforced concrete beams [26,29,30]. Afterwards, a sudden load drop occurred, indicating that concrete crushing failure had transpired.…”

Section: Test Results and Observationssupporting

confidence: 90%

“…Figure 5 shows the relationships between the experimental bending load and the midspan deflection of SG-RGC and HG-RGC. Generally, the load-deflection curves of SG-RGC have three segments, differing from the typical two-segment curves observed in previous studies [25,26] for FRP-reinforced concrete, and an unloading curve segment. The first segment is a steep linear branch wherein the deflection increases linearly with the applied load.…”

Section: Test Results and Observationscontrasting

confidence: 78%

“…The load-carrying capacity of the beam with larger ρ f was higher than that of beams with lower ρf, although the increase was just marginal. This result seems to corroborate with that of Kassem et al [26] findings wherein they found out that increasing ρf by 50% and 100% will marginally increase the flexural capacity by just 4% and 16 %, respectively. The study conducted by Kara et al [44] showed that, for over-reinforced FRP-reinforced concrete beams, a large increase in FRP reinforcement produced a modest increase in normalised capacity.…”

Section: Influence Of the Reinforcement Ratiosupporting

confidence: 92%

“…The absence of transverse reinforcements would increase the contact area between the longitudinal GFRP reinforcements and the geopolymer concrete that would lead to an increase in the rate of stress transfer from the reinforcements to the geopolymer concrete, thereby reducing the crack spacing. The study conducted by Kassem et al [26], on the other hand, showed that the beams with bundled sand-coated FRP bars developed fewer cracks with wider spacing than those with single bars owing to the better bond quality for single bars compared with bundled bars. This crack spacing mechanism described as a function of bond between the reinforcement and the concrete has been well researched and presented in the previous studies [38][39][40][41][42][43].…”

Section: Cracking Behaviourmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of the flexural strength and serviceability of geopolymer concrete beams reinforced with glass-fibre-reinforced polymer (GFRP) bars

Maranan

Manalo

Benmokrane

et al. 2015

Engineering Structures

141

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Geopolymer concrete reinforced with glass-fibre-reinforced polymer (GFRP) bars can provide a construction system with high durability, high sustainability, and adequate strength. Few studies deal with the combined use of these materials, and this has been the key motivation of this undertaking. In this study, the flexural strength and serviceability performance of the geopolymer concrete beams reinforced with GFRP bars were evaluated under a four-point static bending test. The parameters investigated were nominal bar diameter, reinforcement ratio, and anchorage system. Based on the experimental results, the bar diameter had no significant effect on the flexural performance of the beams. Generally, the serviceability performance of a beam is enhanced when the reinforcement ratio increases. The mechanical interlock and friction forces provided by the sand coating was adequate to secure an effective bond between the GFRP bars and the geopolymer concrete. Generally, the ACI 4401.R-06 and CSA S806-12 prediction equations underestimate the beam strength. The bending-moment capacity of the tested beams was higher than that of FRP-reinforced concrete beams from the previous studies.2

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Section: Test Results and Observationssupporting

confidence: 90%

Section: Test Results and Observationscontrasting

confidence: 78%

Section: Influence Of the Reinforcement Ratiosupporting

confidence: 92%

Section: Cracking Behaviourmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of the flexural strength and serviceability of geopolymer concrete beams reinforced with glass-fibre-reinforced polymer (GFRP) bars

Maranan

Manalo

Benmokrane

et al. 2015

Engineering Structures

141

View full text Add to dashboard Cite

show abstract

“…The deflection of a set of beams having geometrical and mechanical properties similar to those of beams tested by Kassem et al [4] have been calculated for different types of FRP reinforcement. Fig.…”

Section: Effect Of Type Of Frp On Beam Deflectionsmentioning

confidence: 99%

Flexural performance of FRP reinforced concrete beams

Kara

Ashour

2012

Composite Structures

111

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A numerical method for estimating the curvature, deflection and moment capacity of FRP reinforced concrete beams is developed. Force equilibrium and strain compatibility equations for a beam section divided into a number of segments are numerically solved due to the nonlinear behaviour of concrete. The deflection is then obtained from the flexural rigidity at midspan section using the deflection formaule for various load cases. A proposed modification to the mid-span flexural rigidity is also introduced to account for the experimentally observed

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Flexural capacity of steel‐FCB bar‐reinforced coral concrete beams

Wang

Song

Huang

et al. 2020

Structural Concrete

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Steel‐fiber composite bar (SFCB) is a new technique with steel core embedded into the fiber‐reinforced polymer (FRP) bars, which solve the shortcomings of poor ductility and low stiffness of FRP‐reinforced concrete members. Based on the experimental study, flexural behavior of a new type concrete, SFCB bars‐reinforced coral concrete beams, is investigated. The deflection, failure mode, tensile strain, and ultimate flexural capacity of this new type of concrete beam are studied in detail through a series four‐points bending tests. The results show that the failure process of SFCB‐reinforced coral concrete beam can be divided into three main stages: elastic, cracking, and failure. Because exterior layer of SFCB bar is able to continue to withstand tensile stress after its steel core yield, hence, the flexural rigidity and flexural capacity of the beams both increase. The flexural stiffness of SFCB bars‐reinforced coral concrete beams is also increased, and the load‐deflection relation is more or less nonlinear. By using SFCB bars, the stiffness of the beams can be increased by about 20%. However, under high stress state, the relative slip between the carbon fiber and the concrete as well as that between the steel core and the carbon fiber cause tensile stress loss which weakened the flexural resistance of the SFCB bar‐reinforced coral concrete beam. The bonding performance between the round surface steel core and the carbon fiber is obviously weaker than that of the threaded surface steel core, and the steel core slip is more likely to occur under the higher tensile stress. When Using ACI440.1R‐15 and GB50608‐2010 to calculate the flexural capacity of the SFCB beams, the ratios of the theoretical value and the measured value from tests are 1.07 and 1.12, respectively. By introducing two new factors k1 and k2, a formula was developed through modification of the existing ones from ACI440.1R‐15 and GB50608‐2010 to calculate the ultimate flexural capacity of SFCB bar reinforced concrete beam which agrees as high as 93–99% with the experimental results.

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Evaluation of Flexural Behavior and Serviceability Performance of Concrete Beams Reinforced with FRP Bars

Cited by 184 publications

References 11 publications

Evaluation of the flexural strength and serviceability of geopolymer concrete beams reinforced with glass-fibre-reinforced polymer (GFRP) bars

Evaluation of the flexural strength and serviceability of geopolymer concrete beams reinforced with glass-fibre-reinforced polymer (GFRP) bars

Flexural performance of FRP reinforced concrete beams

Flexural capacity of steel‐FCB bar‐reinforced coral concrete beams

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