Flexural behaviour of RC beams in fibre reinforced concrete

Meda, Alberto; Minelli, Fausto; Plizzari, Giovanni

doi:10.1016/j.compositesb.2012.06.003

Cited by 142 publications

(69 citation statements)

References 5 publications

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“…Increasing T(Pr-RC) and Pmax(Pr-RC) at 180 days in water environment may be due to the effect of steel fibers in increasing the bar-to-concrete bond and bridging faces of cracks [19,24]. Generally, the use of steel fibers in concrete can be efficient in the limitation of cracks at both micro and macro dimensions.…”

Section: S(pr-rc)28 Was Decreased By About 37% However At 180 Daysmentioning

confidence: 99%

“…Vandewalle [17] found that by the addition of steel fiber to the RC beam, the mean value of crack width and spacing are decreased 37% and 20%, respectively. Campione and Mendola and Meda et al [18,19] found that steel fibers could increase the T RC by useful effects on increasing the bar-to-concrete bond. Mertol et al [20] investigated that T (R+S)C is greater than T RC .…”

Section: Effect Of Steel Fiber On Strength and Toughness Of Rc Beams mentioning

confidence: 99%

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Effect of Steel Fiber and Different Environments on Flexural Behavior of Reinforced Concrete Beams

et al. 2017

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Abstract:The main kind of deterioration in marine Reinforced Concrete (RC) structures and other infrastructures is steel bar corrosion due to cracks in concrete surfaces, which leads to the reduction of the load carrying capacity, ductility, and structural safety. It seems that steel fibers can reduce and delay the cracking, and increase the flexural strength and ductility of marine RC structures. To do so, in marine atmosphere and the tidal zone of the Oman Sea and fresh water, the flexural behavior of beams containing Plain Concrete (PC), Concrete with Steel fiber Reinforcement (SFRC), RC, Concrete with Steel fiber, and bar Reinforcement ((R+S)C) at 28, 90 and 180 days were determined. Beams were 99 un-cracked and pre-cracked beams, with dimensions of 200 × 200 × 750 mm. Based on results and at 180 days, the flexural strength and toughness of pre-cracked (R+S)C beams were 22-43% higher than the pre-cracked RC beams. The effect of steel fiber on the increment of load capacity and the toughness of pre-cracked RC beams were approximately the same. By addition of steel fiber to un-cracked RC beams, load capacity and toughness were increased up to 20%. The load capacity and toughness in marine atmosphere and tidal zone were approximately 15% lower than the fresh water condition.

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Section: S(pr-rc)28 Was Decreased By About 37% However At 180 Daysmentioning

confidence: 99%

Section: Effect Of Steel Fiber On Strength and Toughness Of Rc Beams mentioning

confidence: 99%

Effect of Steel Fiber and Different Environments on Flexural Behavior of Reinforced Concrete Beams

et al. 2017

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“…6(b) showed the steel strains (shown as positive strain, while negative strains are denoted for concrete strains) of the steel reinforcement in OPSC specimen achieved maximum moment capacity at about 4500 microstrain (‰), but the OPSFRC beams attained their respective maximum moments at about 2500-3000 ‰. The strain localization effect was more significant when the fibre content increases (29). The addition of high volume of steel fibres (3% by volume) resulted in earlier bar fracture in HT30 beam (Fig.…”

Section: Flexural Behaviours Of Reinforced Concrete Beamsmentioning

confidence: 99%

“…From the past literature, the effect of fibres on the flexural performances of reinforced concrete beams showed a few common benefits by the incorporation of steel fibres, including reduced brittleness, enhanced crack resistance and moment capacity (21,(26)(27)(28). However, Meda, Minelli & Plizzari (29) had demonstrated that the fibre reinforcement can lead to a reduction in the ductility of reinforced concrete beams; while Qian & Indubhushan (26) and Wang & Belarbi (28) reported that steel fibres increased the displacement of beams at failure. The complexity then lies on the diverged observations on the flexural ductility of fibrereinforced concrete beams in past reports.…”

Section: Research Backgroundmentioning

confidence: 99%

High strength oil palm shell concrete beams reinforced with steel fibres

Yap

Alengaram

et al. 2017

Mater. construcc.

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ABSTRACT:The utilization of lightweight oil palm shell to produce high strength lightweight sustainable material has led many researchers towards its commercialization as structural concrete. However, the low tensile strength of Oil Palm Shell Concrete (OPSC) has hindered its development. This study aims to enhance the mechanical properties and flexural behaviours of OPSC by the addition of steel fibres of up to 3% by volume, to produce oil palm shell fibre-reinforced concrete (OPSFRC). The experimental results showed that the steel fibres significantly enhanced the mechanical properties of OPSFRC. The highest compressive strength, splitting tensile and flexural strengths of 55, 11.0 and 18.5 MPa, respectively, were achieved in the OPSFRC mix reinforced with 3% steel fibres. In addition, the flexural beam testing on OPSFRC beams with 3% steel fibres showed that the steel fibre reinforcement up to 3% produced notable increments in the moment capacity and crack resistance of OPSFRC beams, but accompanied by reduction in the ductility. RESUMEN: Vigas de hormigón de alta resistencia con palma de aceite reforzados con fibras de acero. La utilización de cáscara ligera de palma de aceite para producir materiales duraderos y de alta resistencia ha llevado a muchos investigadores a su comercialización como hormigón estructural. Sin embargo, la baja resistencia a la tracción del hormigón de cáscara de palma de aceite (OPSC) ha obstaculizado su desarrollo. Este estudio tiene como objetivo mejorar las propiedades mecánicas y los comportamientos de flexión de OPSC mediante la adición de fibras de acero de hasta un 3% en volumen, para producir hormigón armado de fibra de palma de aceite (OPSFRC). Los resultados experimentales mostraron que las fibras de acero mejoraron significativamente las propiedades mecánicas de OPSFRC. En la mezcla OPSFRC reforzada con fibras de acero al 3% se obtuvieron las mayores resistencias a la compresión, resistencia a la tracción ya la flexión de 55, 11,0 y 18,5 MPa, respectivamente. Además, el ensayo de vigas flexibles en haces OPSFRC con fibras de acero al 3% mostró que el refuerzo de fibra de acero hasta 3% produjo incrementos notables en la capacidad momentánea y resistencia a la fisuración de los haces OPSFRC, pero acompañado de una reducción de la ductilidad.PALABRAS CLAVE: Árido; Hormigón; Refuerzo de fibras; Resistencia a la flexión; Propiedades mecánicas ORCID ID: S. Poh-Yap

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“…Mechanical characteristics, such as brittleness reduction, can also be improved, though not significantly in terms of strength [5][6][7][8][9][10], except for tensile capacity. More specifically, the contribution of fibers, especially steel fibers, to the tensile capacity of concrete is quite significant.…”

Section: Introductionmentioning

confidence: 99%

A Model for the Prediction of the Tensile Strength of Fiber-Reinforced Concrete Members, Before and After Cracking

Vougioukas

Papadatou

2017

Fibers

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Abstract:The tensile behavior of concrete or mortar plays an important role for delaying the formation and propagation of cracks, and also for upgrading the bearing capacity of existing concrete and masonry constructions. Although the presence of steel fibers is known to improve, often considerably, the tensile capacity of concrete members, methods for the quantification of this improvement are still limited. For this reason, a model has been developed for the prediction of the tensile strength of steel fiber-reinforced concrete members, as crack opening occurs. Given the geometry and the physical characteristics of reinforced concrete member and fibers, the model predicts: (1) the number of fibers crossing a crack's surface; (2) the distribution of these fibers in terms of (i) the angle a fiber forms with the crack surface (fiber inclination) and (ii) the embedded length of the fiber at both sides of the surface; (3) resistance to crack opening provided by each fiber, in relation to its position and inclination. On the results of the results obtained, the influence of the number of fibers on the reduction of crack widening in concrete or mortar is remarkable and can be estimated with satisfactory precision. In upgrading existing concrete and masonry constructions, this tensile behavior is found to play important role.

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Flexural behaviour of RC beams in fibre reinforced concrete

Cited by 142 publications

References 5 publications

Effect of Steel Fiber and Different Environments on Flexural Behavior of Reinforced Concrete Beams

Effect of Steel Fiber and Different Environments on Flexural Behavior of Reinforced Concrete Beams

High strength oil palm shell concrete beams reinforced with steel fibres

A Model for the Prediction of the Tensile Strength of Fiber-Reinforced Concrete Members, Before and After Cracking

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