Evaluation of shear strength of fibre-reinforced concrete beams

Al-Ta'an, Saad Ali; Al-Feel, J. R.

doi:10.1016/0958-9465(90)90045-y

Cited by 62 publications

(14 citation statements)

References 2 publications

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“…The research by others indicated that the bond between fiber and concrete should be higher than those of the normal‐strength concrete because of the high‐density matrix in the high‐strength concretes such as UHPFRC. An average value of 4.15 MPa for the fiber bond strength was also recommended by Al‐Ta'an and Al‐Feel . Khalil and Tayfur used Equation to adopt to the ACI 544 model with some modifications.…”

Section: Numerical Calculation Of Flexural Moment Capacitymentioning

confidence: 99%

Flexural behavior of ultra‐high‐performance fiber reinforced concrete beams with low and high reinforcement ratios

Hasgül

Türker

Birol

et al. 2018

Structural Concrete

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In the study, the effects of using ultra‐high‐performance fiber reinforced concrete (UHPFRC) on deflection and curvature ductilities, moment capacities, flexural stiffness, and cracking behaviors of beams were experimentally investigated. Eight singly reinforced beams with four tensile reinforcement ratios (0.009, 0.019, 0.028, and 0.043) were tested under four‐point loading to create a pure moment behavior in the mid region. The evaluations were made by comparing the UHPFRC beams and non‐fiber beams containing UHPFRC matrix without steel fiber. Straight micro‐steel fibers with volumetric ratio of 1.5% were used in the UHPFRC matrix. The results of study indicate that the use of UHPFRC for beams having especially high reinforcement ratios provides significant advantages in terms of the considered parameters. Especially high compressive strength and deformation capacity of the UHPFRC allow the use of high reinforcement ratios in beams which results in more economical sizes as long as the beam deflections ensure for both the serviceability and the ultimate limit states. In this study, however, the simplified numerical approach developed for the flexural design of fiber reinforced concrete was applied to the UHPFRC beams, as well.

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Section: Numerical Calculation Of Flexural Moment Capacitymentioning

confidence: 99%

Flexural behavior of ultra‐high‐performance fiber reinforced concrete beams with low and high reinforcement ratios

Hasgül

Türker

Birol

et al. 2018

Structural Concrete

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“…The second type of fibre is larger and arrests the propagation of macrocracks, thus leading to a significant improvement in fracture toughness [21]. Furthermore, it has been revealed that it is possible to replace conventional shear reinforcement by steel fibres and achieve similar ductility and strength [18,[23][24][25][26][27][28][29][30][31]. Numerous tests have also been carried out to select the type of fibre and optimum volume percentage, as well as to ensure the shear strength of RC beams without brittle failure [13,[18][19][20][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Fibres as Shear Reinforcement in High-Performance Concrete Beams with and without Openings

Smarzewski¹

2018

Applied Sciences

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The article presents the results of research work aimed at testing the use of hybrid steel-polypropylene fibre as a strengthening solution to upgrade reinforced high-performance concrete (HPC) beams with openings (BO1 ÷ BO3) and without (B1 ÷ B3). A total of six simply supported beams were tested under four-point bending. The test beams had a cross section of 200 × 400 mm and a total length of 2500 mm. Two square openings in each shear span were located symmetrically about the mid-point in three BO beams. Research was carried out with regard to the quantity and type of reinforcement. Beams B1 and BO1 were constructed with traditional reinforcement made of steel bars. As regards the remaining beams, instead of stirrups and compressive bars, fibre reinforcement of varying fibre volume contents was applied. In the analysis, a non-contact system for three-dimensional measurements of strain and displacement was used. Analysis of the behaviour of the beams under static load was based on the measurements of cracks, deflections and strains. The test results show that the first diagonal crack and the ultimate shear strength increase significantly as the fibre content increases. The above study showed that the hybrid fibres have a positive effect, reducing crack width and ensuring an increase in the load-bearing capacity.

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“…(fiber length to diameter) ranging between 20 to 100 in concrete, has been proven to enhance the shear strength by resisting the formation and growth of cracks (Al-Ta'an and Al-Feel 1990). The use of fibers in thin sections and congested reinforcing steel sections is highly beneficial, as it may be difficult to provide conventional web reinforcement.…”

Section: Latin American Journal Of Solids and Structures 13 (2016) 14mentioning

confidence: 99%

“…In addition, the ultimate shear strength of SFRC beams are affected by the properties of the fiber, namely: 1) type, 2) length, 3) aspect ratio, and 4) volume content. Various researchers assumed that the shear resistance of SFRC beams without web reinforcement is based on: 1) the shear force in the untracked compression zone, 2) the aggregate interlock force in the cracked tensile concrete, 3) the dowel force in the main steel, and 4) the contribution of steel fibers in the diagonal crack zone (Al-Ta'an and Al-Feel 1990;Lim and Oh 1999;Dinh 2009). Figure 1 shows the shear resistance forces at the inclined tensile crack of SFRC beam without web reinforcement.…”

Section: Parameters Influencing the Ultimate Shear Strength Of Sfrcmentioning

confidence: 99%

“…This problem is complicated by the nonlinear interactions arising from the inclusion of steel fiber in concrete. At present, numerous predictive models for the evaluation of the ultimate shear strength of SFRC beams have been developed based on the regression analysis (Mansour et al 1986;Sharma 1986;Al-Ta'an and Al-Feel 1990;Khuntia et al 1999). In such complex problems, which are difficult to be modeled using conventional modeling techniques, the application of ANNs may have a good application potential.…”

Section: Latin American Journal Of Solids and Structures 13 (2016) 14mentioning

confidence: 99%

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Influence of Fiber Properties on Shear Failure of Steel Fiber Reinforced Beams Without Web Reinforcement: ANN Modeling

Abbas

Khan

2016

Lat. Am. j. solids struct.

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In this paper, an artificial neural network (ANN-10) model was developed to predict the ultimate shear strength of steel fiber reinforced concrete (SFRC) beams without web reinforcement. ANN-10 is a four-layered feed forward network with a back propagation training algorithm. The experimental data of 70 SFRC beams reported in the technical literature were utilized to train and test the validity of ANN-10. The input layer receives 10 input signals for the fiber properties (type, aspect ratio, length and volume content), section properties (width, overall depth and effective depth) and beam properties (longitudinal reinforcement ratio, compressive strength of concrete and shear span to effective depth ratio). ANN-10 has exhibited excellent predictive performance for both training and testing data sets, with an average of 1.002 for the average of predicted to experimental values. This performance of ANN-10 established the promising potential of Artificial Neural Networks (ANNs) to simulate the complex shear behavior of SFRC beams. ANN-10 was applied to investigate the influence of the fiber volume content, type, aspect ratio and length on the ultimate shear strength of SFRC.

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Evaluation of shear strength of fibre-reinforced concrete beams

Cited by 62 publications

References 2 publications

Flexural behavior of ultra‐high‐performance fiber reinforced concrete beams with low and high reinforcement ratios

Flexural behavior of ultra‐high‐performance fiber reinforced concrete beams with low and high reinforcement ratios

Hybrid Fibres as Shear Reinforcement in High-Performance Concrete Beams with and without Openings

Influence of Fiber Properties on Shear Failure of Steel Fiber Reinforced Beams Without Web Reinforcement: ANN Modeling

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