Behaviour of fibre reinforced concrete deep beams

Sachan, A. K.; Rao, C. V. S. Kameswara

doi:10.1016/0958-9465(90)90022-p

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…Secondly, the tensile strength of the concrete matrix can be improved with the presence of fibres, which can enhance the cracking shear force capacity of a structural element [20,28]. Despite the aforementioned merits of using steel fibres, there are limited published research efforts quantifying the effects of incorporating steel fibres on the behaviour of deep beams [11,12,[29][30][31][32][33][34][35][36][37][38][39]. These limited research efforts indicated the efficacy of steel fibres in enhancing the shear resistance and ductility of deep beams.…”

Section: Introductionmentioning

confidence: 99%

Shear resistant capacity of steel fibres reinforced concrete deep beams: An experimental investigation and a new prediction model

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Shear resistant capacity of steel fibres reinforced concrete deep beams: An experimental investigation and a new prediction model

et al. 2021

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“…The second benefit could be that deploying a sufficient amount of steel fibers can increase the tensile strength of the concrete matrix, which improves the shear-cracking resistance of the member [14]. Despite these evident benefits, up to now, relatively few works dealing with the use of steel fibers in deep beams have been published [8,[22][23][24][25][26][27][28]. All these works indicated the effectiveness of steel fibers in enhancing the shear capacity and ductility of deep beams.…”

Section: Introductionmentioning

confidence: 99%

Effect of fiber amount and stirrup ratio on shear resistance of steel fiber reinforced concrete deep beams

Do-Dai

Tran

Nguyen-Minh

2021

STCE

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This paper deals with the effect of steel fiber amounts and the interaction between the fiber amount and stirrup ratio on the shear behavior and capacity of reinforced concrete (RC) deep beams with steel fibers. The experimental program was carried out on twelve deep beams with different fiber amounts (0, 30, 40, and 65 kg/m3) and stirrup ratios (0.1, 0.15, and 0.25%). The test results have shown that the use of steel fibers increased the shear resistance (up to 55%), reduced the shear crack width (up to 11 times) and deflection (up to 57%) of the tested deep beams. Also, it was found that using unsuitable steel fiber amount and stirrup ratio would reduce the efficiency of the fibers in a deep beam due to the interaction between the fibers and stirrups. Increasing the stirrup ratio in a deep beam with a high amount of steel fibers can reduce the efficacy of the fibers in enhancing the shear capacity of the beam. The most cost-effective steel fiber amount was found to be around 30 to 45 kg/m3. Keywords: steel fibers; deep beam; shear capacity; fiber amount; stirrup ratio.

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“…Several researchers studied the effect of adding discrete steel fibers to the concrete in deep beams and found that ultimate shear capacity is significantly improved [40][41][42]. Beshara et al [43] studied the effect of different parameters of steel fibers on response characteristics of deep beams having web reinforcements.…”

Section: Discrete Fibers In Concretementioning

confidence: 99%

Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams

Sagi

Lakavath

Prakash

et al. 2021

Fibers

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This study investigates the possibility of replacing the minimum web reinforcement in deep beams with discrete fibers. Additionally, the equivalent dosage of fibers required to obtain similar performance of the deep beam with minimum web reinforcement is investigated. Deep beams made of plain concrete with no fibers, beams with minimum web reinforcement as per AASHTO LFRD recommendations (0.3% in both horizontal and vertical), and with a 0.5% volume fraction of steel, macro-synthetic and hybrid fibers are tested at a shear span to height ratio (a/h) of one. Test results show that the presence of 0.3% web reinforcement in horizontal and vertical directions increased the peak load by 25% compared to the plain concrete beams. However, it did not significantly change the first diagonal crack load. With the addition of 0.5% of steel, macro-synthetic and hybrid fibers, the peak load increased by 49%, 42%, and 63%, respectively, compared to the plain concrete specimen. The addition of steel fibers significantly improved the first cracking load. In contrast, macro-synthetic fibers did not affect the first cracking load but improved the ductility with higher deflections at peak. Hybridization of steel and macro synthetic fibers showed improved performance compared to the individual fibers of the same volume in peak load and ductility. Test results showed that a 0.5% volume fraction of discrete macro steel or synthetic or hybrid fibers can be used to completely replace the minimum web reinforcement (0.3% in both directions).

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Behaviour of fibre reinforced concrete deep beams

Cited by 11 publications

References 5 publications

Shear resistant capacity of steel fibres reinforced concrete deep beams: An experimental investigation and a new prediction model

Shear resistant capacity of steel fibres reinforced concrete deep beams: An experimental investigation and a new prediction model

Effect of fiber amount and stirrup ratio on shear resistance of steel fiber reinforced concrete deep beams

Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams

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