Exploring GFRP bars as reinforcement for rectangular and L-shaped beams subjected to significant torsion: An experimental study

Deifalla, Ahmed Farouk; Hamed, Mostafa A.; Amin, S.; Ali, Tarek T.

doi:10.1016/j.engstruct.2013.11.027

Cited by 60 publications

(21 citation statements)

References 19 publications

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“…Chitsazan et al [13] studied experimentally the enhancement of the flexural behavior of concrete beams with GFRP bars by using high strength concrete and increasing the effective depth over the breadth of the beam. Deifalla et al [14] found that the bonded GFRP stirrups were more effective as transversal reinforcement compared with the bent steel stirrups and the bent GFRP stirrups. It improved the ultimate torsional strength and increased the corresponding unit angle of twist and the maximum stirrup strain as well as the major concrete crack width in L-shaped beam subjected to torsion.…”

Section: Introductionmentioning

confidence: 99%

Behavior of concrete beams reinforced with hybrid steel and FRP composites

Mustafa

Hassan

2018

HBRC Journal

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This paper presents a nonlinear finite element model to investigate the behavior of hybrid Fiber Reinforced Polymers and steel reinforcement. Different types of Fiber Reinforced Polymers; CFRP and GFRP; were used along with steel rebars in the studied concrete beams. The study was conducted using the nonlinear finite element program ''ANSYS". Nonlinear material models for the components of the concrete beam were used in the three dimensional finite element models. The outcomes got from finite element analysis were confirmed against experimental results. A broad parametric study was conducted to explore the effect of replacing steel reinforcement by different types of FRP bars. The study showed that the contribution of steel rebars to FRP rebars in concrete beams improved beam ductility and eliminated the unfavorable brittle failure of the concrete beam. In addition, it is better to use steel rebars as top reinforcement in concrete beams with hybrid reinforcement. In hybrid GFRP/steel reinforced concrete beams, a significant reduction in stiffness and a noticeable increase in the beams' deflection after the initiation of first crack and yielding of steel reinforcement were observed. On the other hand, in hybrid CFRP/steel reinforced concrete beams showed a better performance during cracking initiation and propagation.

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Section: Introductionmentioning

confidence: 99%

Behavior of concrete beams reinforced with hybrid steel and FRP composites

Mustafa

Hassan

2018

HBRC Journal

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“…As a result, only three RC L-shaped beams and one RC T-shaped beam were found and for which all the data are given. The beams are as follows: beam LB1 (L-shaped) and beam TB1 (T-shaped) from Deifalla et al in 2013 and 2014 [10,40]; beams BL1 (L-shaped) from El-Kateb et al in 2013 [41]; and beam BK-T (L-shaped) from Kaminski and Pawlak in 2011 [30].…”

Section: Reference Beamsmentioning

confidence: 99%

“…From those studies, some beams (for which all data were given) were also incorporated in this study as reference beams. These are as follows ones: beams LB2, LB3, LB4 and LB5 (L-shaped) from Deifalla et al in 2014 [10].…”

Section: Reference Beamsmentioning

confidence: 99%

“…T M   curves for beam LB2 [10]. T M   curves for beam LB3 [10]. T M   curves for beam LB4 [10].…”

Section: Comparative Analysesmentioning

confidence: 99%

“…This is because the torsional moment is distributed between the web and the flanges (without warping of the cross section if the components are thick), while the web and its transverse reinforcement carry most of the shear force. However, the behavior of flanged beams under torsion is more complicated when compared with rectangular beams and highly depends on the cross section shape, on the relative dimensions of the components of the cross section and also on the detailing of the reinforcement (both longitudinal and transverse) [8][9][10][11]. For the case of L-shaped beams, the non-symmetric shape induces an additional complex behavior under torsion which needs to be assessed [12].…”

Section: Introductionmentioning

confidence: 99%

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Modeling the Full Behavior of Reinforced Concrete Flanged Beams under Torsion

Bernardo

2019

Applied Sciences

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Recently, an analytical model called the generalized softened variable angle truss-model (GSVATM) aimed to predict the full behavior of reinforced concrete (RC) rectangular beams under torsion. In this article, such a model is used to compute the full torsional behavior of RC flanged beams, namely T- and L-shaped beams. The calculation procedure to include the influence of the flanges is described. A comparative analysis between the predictions from the GSVATM and some experimental results, related with RC flanged beams under torsion and found in the literature, is also presented. From this comparative analysis and for high loading levels, the GSVTM is reliable. Yet, for low loading levels, the theoretical model still needs to be refined.

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