Performance of glass fiber reinforced plastic bars as a reinforcing material for concrete structures

Alsayed, Saleh H.; Al-Salloum, Yousef; Almusallam, Tarek

doi:10.1016/s1359-8368(99)00049-9

Cited by 144 publications

(44 citation statements)

References 3 publications

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“…In the last two decades, several studies [8][9][10][11][12][13][14] investigated the flexural behaviour of simply supported FRP reinforced concrete beams. However very few, though important studies, investigated the behaviour of continuous concrete beams reinforced with FRP bars [4,15,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Moment redistribution in continuous FRP reinforced concrete beams

Kara

Ashour

2013

Construction and Building Materials

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The main purpose of this paper is to assess moment redistribution in continuous concrete beams reinforced with fibre reinforced polymer (FRP) bars. A numerical technique based on equilibrium of forces and full compatibility of strains has been developed to evaluate the moment-curvature relationships and moment capacities of FRP and steel reinforced concrete sections. Moment redistribution has then been assessed by comparing elastic and experimental moments at failure, and moment capacity at critical sections of continuous FRP reinforced concrete beams reported on the literature.The curvature of under reinforced FRP sections was large at FRP rupture but failure was sudden, that would not allow any moment redistribution. On the other hand, FRP over reinforced sections experienced higher curvature at failure than steel over reinforced sections owing to the lower FRP modulus of elasticity. Although the experimental and elastic bending moment distributions at failure are significantly different for many beams tested elsewhere, in particular CFRP reinforced concrete beams, the experimental bending moment over the middle support at failure was far lower than the corresponding moment capacity owing to the de-bonding of FRP bars from concrete in the middle support region. Furthermore, the hogging moment redistribution over the middle support is always larger than that at mid-span by around 66%. It was also shown that the load 2 capacity prediction of continuous FRP reinforced concrete beams using the de-bonding moment at the middle support section was the closest to the experimental failure load.

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Section: Introductionmentioning

confidence: 99%

Moment redistribution in continuous FRP reinforced concrete beams

Kara

Ashour

2013

Construction and Building Materials

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“…Since little is known about the behavior of such composite bars [2], extensive research investigations have been undertaken in order to use these new reinforcements for structural applications. Such applications necessitate either developing a new design code or adopting and modifying the current one to account for the engineering characteristics of FRP materials [3]. 3 The ACI 440 Committee introduced a model established through experimental and analytical principles that could predict the flexural capacity as well as the deflection of concrete members reinforced with FRP bars [4].…”

Section: Introductionmentioning

confidence: 99%

“…Such applications necessitate either developing a new design code or adopting and modifying the current one to account for the engineering characteristics of FRP materials [3]. 3 The ACI 440 Committee introduced a model established through experimental and analytical principles that could predict the flexural capacity as well as the deflection of concrete members reinforced with FRP bars [4]. The ACI 440 equations are a very important step toward the implementation of FRP composites in civil engineering applications; yet the guidelines could be revised when more data become available [5] to enlighten potential users on the applicability of these equations.…”

Section: Introductionmentioning

confidence: 99%

Continuous concrete beams reinforced with CFRP bars

Ashour

Habeeb

2008

Proceedings of the Institution of Civil Engineers - Structures

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Test results show that increasing the CFRP reinforcement ratio of the bottom layer of simply and continuously supported concrete beams is a key factor in enhancing the load capacity and controlling deflection. Continuous concrete beams reinforced with CFRP bars exhibited a remarkable wide crack over the middle support that significantly influenced their behaviour. The load capacity and deflection of CFRP simply supported concrete beams are reasonably predicted using the ACI 440.1R-06 equations.However, the potential capabilities of these equations for predicting the load capacity and deflection of continuous CFRP reinforced concrete beams have been adversely affected by the de-bonding of top CFRP bars from concrete.

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“…Furthermore, they are non-conductive for electricity and nonmagnetic. However, the major obstacles of the application of FRP bars as a reinforcing material for concrete structures are the high initial costs, low modulus of elasticity, lack of ductility (linear stressstrain diagram up to rupture with no discernible yield point) and the small number of reliable design formulations to predict the behaviour of concrete elements reinforced internally with FRP bars [2,[4][5][6][7][8]. Concrete members reinforced with FRP subject to bending behave linearly up to cracking, and almost linearly after cracking with a lower flexural stiffness when compared with homologous beams reinforced with steel bars.…”

Section: Introductionmentioning

confidence: 99%

A design model for fibre reinforced concrete beams pre-stressed with steel and FRP bars

Barros

Taheri

Salehian

et al. 2012

Composite Structures

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This paper presents a design oriented model to determine the moment-curvature relationship of elements of rectangular cross section failing in bending, made by strain softening or strain hardening fibre reinforced concrete (FRC) and reinforced with perfectly bonded pre-stressed steel and fibre reinforced polymeric (FRP) bars. Since FRP bars are not affected by corrosion, they have the minimum FRC cover thickness that guaranty proper bond conditions, while steel bars are positioned with a thicker FRC cover to increase their protection against corrosion. Using the moment-curvature relationship predicted by the model in an algorithm based on the virtual work method, a numerical strategy is adopted to evaluate the load-deflection response of statically determinate beams. The predictive performance of the proposed formulation is assessed by simulating the response of available experimental results. By using this model, a parametric study is carried out in order to evaluate the influence of the main parameters that characterize the post cracking behaviour of FRC, and the prestress level applied to FRP and steel bars, on the moment-curvature and load-deflection responses of this type of structural elements. Finally the shear resistance of this structural system is predicted.

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Performance of glass fiber reinforced plastic bars as a reinforcing material for concrete structures

Cited by 144 publications

References 3 publications

Moment redistribution in continuous FRP reinforced concrete beams

Moment redistribution in continuous FRP reinforced concrete beams

Continuous concrete beams reinforced with CFRP bars

A design model for fibre reinforced concrete beams pre-stressed with steel and FRP bars

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