Flexural Behaviour of Concrete Beams Reinforced With GFRP Bars

Ascione, Luigi; Mancusi, Geminiano; Spadea, Saverio

doi:10.1111/j.1475-1305.2009.00662.x

Cited by 47 publications

(26 citation statements)

References 14 publications

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“…To illustrate the prediction accuracy of ACI.440 equations, a comparison between ACI equation and experimental results is also made referring to the literature [8,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] including the experimental deflection-moment data of 91 concrete beams reinforced with FRP bars in the database collected, as in Table 4.…”

Section: Deflection Prediction Deviationmentioning

confidence: 99%

Experimental study on the flexural deflections of concrete beam reinforced with Basalt FRP bars

2014

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This paper presents an experimental study of the flexural defections of concrete beam reinforced with basalt FRP bars. Six concrete beams with different BFRP reinforcement ratio and one comparative beam reinforced with steel rebar are tested in laboratory. Numerical simulations using sectional analysis method and spatial FEM are performed. The experimental results can fit well with numerical simulation results. Analysis and experimental results in the literature collected indicate that the ACI-440.1R-06 equations underestimate the deflection of FRP-RC beams. Based on the experimental and numerical simulation results, a modified equation of the flexural rigidity is proposed to calculate the deflection of the FRP-RC beams. The proposed equation can fit better with the experimental results than the ACI-440.1R-06 equations.

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Section: Deflection Prediction Deviationmentioning

confidence: 99%

Experimental study on the flexural deflections of concrete beam reinforced with Basalt FRP bars

2014

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“…Subsequently, Fibre reinforced polymers (FRP) reinforcement has received a lot of attention, as the flexibility of the raw fibres prior to the application of resin allows reinforcement to be shaped precisely as required [3]. FRP also has a number of physical advantages over steel: it is non-magnetic, has a very high strength to weight ratio, and is not susceptible to corrosion [4,5].…”

Section: Introductionmentioning

confidence: 99%

Bend-strength of novel filament wound shear reinforcement

Spadea

Orr

Ivanova

2017

Composite Structures

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The winding of Fibre Reinforced Polymer (FRP) tows around longitudinal reinforcing bars provides a novel method for the fabrication of reinforcement cages for concrete structures. A key limitation on the contribution of FRP to the shear capacity of a concrete member is found at corners, where stress concentrations can lead to premature failure. An experimental programme, comprising 30 test samples, was undertaken to assess the bend capacity of filament wound FRP (W-FRP) shear links manufactured using a carbon tow impregnated with epoxy resin. A new methodology was developed to allow for rapid testing of the samples as well as their self-realignment during load application. A fixed bend radius of 5mm and six non-circular fibre cross sectional areas having different width-thickness ratios were considered. Additionally, 18 samples were tested to measure the tensile properties of the straight reinforcement. The results indicate that W-FRP exhibit improved bend strength as compared to conventional FRP with circular sections, as a larger width-thickness ratio of the reinforcement provided more strength for a given cross sectional area. A good correlation between the test results and predictions of the W-FRP bend strength was observed when the specimens were modelled as a collection of transformed individual circular sections.

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“…Also, due to the lower stiffness of the FRP material, FRP RC beams display lower postcracking bending stiffness than traditional steel reinforced RC beams [11]. Therefore, to prevent FRP rupture, which can be catastrophic and may occur without warning, it is recommended to design the beams to fail by concrete crushing (over-reinforced).…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the behaviour of concrete beams reinforced with GFRP bars under static and impact loading

Goldston

Remennikov

Sheikh

2016

Engineering Structures

130

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Composite materials, including Fibre Reinforced Polymer (FRP) bars, have been gaining momentum as alternatives to traditional steel reinforcements in civil and structural engineering sectors. FRP materials are non-corrosive, non-conductive, and lightweight and possess high longitudinal tensile strength, which are advantageous for their use in civil infrastructure. This paper presents the results of an experimental investigation into the effects of the use of glass FRP (GFRP) bars as internal reinforcement on the behaviour of concrete beams. Both static and dynamic (impact) behaviours of the beam have been investigated. Twelve GFRP reinforced concrete (RC) beams were designed, cast and tested. Six GFRP RC beams were tested under static loading to examine the failure modes and associated energy absorption capacities. The remaining six GFRP RC beams were tested under impact loading using a drop hammer machine at the University of Wollongong. GFRP RC beams with higher reinforcement ratio showed higher post cracking bending stiffness and experienced flexural-critical failure under static loading. However, GFRP RC beams under impact loading, regardless of their shear capacity, experienced a "shear plug" type of failure around the impact zone. Energy absorption capacities of beams were determined. The average dynamic amplification factor was calculated as 1.15, indicating higher dynamic moment capacities compared to static moment capacities (15-20% increase). Reinforcement ratio and the strength of concrete influenced the behaviour of GFRP RC beams. -------------------------------------------------------- * Corresponding authors Research Highlights Flexural behaviour of GFRP RC beams has been investigated. Twelve GFRP reinforced concrete (RC) beams were designed, cast and tested. Six GFRP RC beams were tested under static loading to examine the failure modes and associated energy absorption capacities. The remaining six GFRP RC beams were tested under impact loading using a drop hammer machine at the University of Wollongong. GFRP RC beams with higher reinforcement ratio showed higher post cracking bending stiffness and experienced flexuralcritical failure under static loading. However, GFRP RC beams under impact loading, regardless of their shear capacity, experienced a "shear plug" type of failure around the impact zone. Energy absorption capacities of beams were determined. The average dynamic amplification factor was calculated as 1.15, indicating higher dynamic moment capacities compared to static moment capacities (15-20% increase). Reinforcement ratio and the strength of concrete influenced the behaviour of GFRP RC beams.

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Flexural Behaviour of Concrete Beams Reinforced With GFRP Bars

Cited by 47 publications

References 14 publications

Experimental study on the flexural deflections of concrete beam reinforced with Basalt FRP bars

Experimental study on the flexural deflections of concrete beam reinforced with Basalt FRP bars

Bend-strength of novel filament wound shear reinforcement

Experimental investigation of the behaviour of concrete beams reinforced with GFRP bars under static and impact loading

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