Behavior of Simply Supported and Continuous Concrete Deep Beams Reinforced with GFRP Bars

Mohamed, Ahmed meslam; Mahmoud, Karam; El-Salakawy, Ehab

doi:10.1061/(asce)cc.1943-5614.0001039

Cited by 12 publications

(8 citation statements)

References 14 publications

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“…A numerical study by Chen et al [44] on concrete deep beams strengthened with FRP rebars showed that the aggregate interlock action was a key mechanism, causing the reinforcing stiffness to influence the shear strength. Mohamed et al [45] assessed the behavior of continuous concrete deep beams strengthened with GFRP rebars. As per the results, the load capacity of the beams was dramatically reduced as the a/h ratio increased due to a drop in the strut's angle of inclination.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Concrete Strength and FRP Reinforcement Type on the Non-Linear Behavior of Concrete Deep Beams

et al. 2022

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To provide sustainable reinforced concrete deep beams, the replacement of steel rebars by FRP rebars with high-chemical resistance is proposed by researchers. However, the effects of the concrete strength, top and web longitudinal reinforcements, and types of FRP flexural rebars on the non-linear performance of concrete deep beams have rarely been evaluated. This study numerically assessed the effects of the top and web longitudinal reinforcements and concrete strength on the non-linear behaviour of GFRP- and CFRP-strengthened concrete deep beams with various shear span-to-overall depth (a/h) ratios. As per the results, the highest tensile stress was obtained for the steel reinforcement, and the tensile stress in the CFRP reinforcement was more than that of the GFRP reinforcement under the failure load. Meanwhile, the results of high- and normal-strength concrete deep beams with the web reinforcement (16.4%) were lower than those without the web reinforcement (22.3%). Therefore, the web reinforcement moderately compensated for the low strength of normal concrete and the absence of the top longitudinal rebar to reinforce concrete deep beams in carrying the ultimate load. Furthermore, the participation of the GFRP reinforcement with the high-strength concrete was more than that with the normal-strength concrete in carrying a higher amount of loading.

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Section: Introductionmentioning

confidence: 99%

Effects of the Concrete Strength and FRP Reinforcement Type on the Non-Linear Behavior of Concrete Deep Beams

et al. 2022

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“…The effective reinforcement ratio (ρeff) was calculated by multiplying the actual reinforcement ratio by the ratio of the elastic modulus of FRP bars (Ef) to that of steel bars (Es) to convert it into one variable i. e. ρeff=ρf(Ef/Es). In addition to these members, 14 continuous beams (Mohamed et al, 2020, 2021; Zinkaah et al, 2019) were also added separately to investigate their effect on the prediction equations. Table 2 shows the details of the specimens used in this study, including the predicted results using different methods.…”

Section: Description Of Databasementioning

confidence: 99%

“…The modification was found to be effective and in good agreement between the experimental and predicted values. Mohamed et al (Mohamed et al, 2020) investigated the behavior of simply supported and continuous GFRP reinforced deep beams without web reinforcement. The authors observed different behaviors for simply supported and continuous beams.…”

Section: Introductionmentioning

confidence: 99%

Proposed prediction models for shear strength of fiber reinforced polymer reinforced concrete deep members without stirrups

Alam

2023

Advances in Structural Engineering

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Arch action in deep reinforced concrete (RC) members has a beneficial effect on shear capacity. The Strut-and-Tie Method (STM) is one of the proposed methods for the design of steel reinforced deep beams (DBs). However, some iterations may require to obtain the optimum solution. This paper investigates the shear capacity of fiber reinforced polymer (FRP)-reinforced DBs using STM and sectional methods of Canadian Standard Association (CSA) and American Concrete Institute (ACI) design provisions. To this end, 106 FRP-reinforced DBs were compiled from the literature. It has been found that current sectional methods do not adequately account for the effects of arch. action on DBs. From this investigation, modifications were proposed in the current sectional methods to calculate the shear capacity of FRP-reinforced DBs. The proposed modifications were found to significantly improve the prediction accuracy. The sectional methods proposed by CSA and ACI were found to be better than the CSA-STM method in predicting the shear capacity of FRP-reinforced DBs.. The mean, standard deviation and coefficient of variation for the proposed CSA sectional method are 1.00, 0.28 and 28.2% and for the proposed ACI sectional method are 1.01, 0.26 and 25.6, respectively. The same for the CSA-STM method are 2.20, 0.76 and 34.4%, respectively. The proposed methods can be used to predict the shear capacity of FRP reinforced deep members.

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“…It was noticed an excellent matching between the derived equation and the FE results. Continuous deep beams have been studied in many articles with static load [32][33][34][35], repeated and cyclic loads on simply supported deep beams [34,36], rubberized continuous deep beams were statically tested [37,38], and rubberized deep beams under static loads [39]; but, there was no investigation under the effect of harmonic loads. Therefore, solving the CDBs under the effect of harmonic loads has not been studied yet.…”

Section: Literature Reviewmentioning

confidence: 99%

Response of Rubcrete Continuous Deep Beams under Sinusoidal Loads

Makki

Al-Mutairee

2022

IJE

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Continuous deep beams (CDBs) are the most used members in constructions with highly exposing to different types of dynamic loads. It is well known that; the concrete is a brittle material and has a weak resistance to energy absorption. Using scrapped tire rubber enhances the concrete energy absorption for sustainability purposes. Timoshenko beam theory has been used to solve CDBs subjected to sinusoidal load and has been adopted for verification of numerical results of ANSYS APDL V.15.0. Seven concrete mixes have been simulated with different types and amounts of aggregaterubber replacements. Several parameters have been studied like replacing type, percentages, shear span of beam to depth ratio (a/h) and load intensity. It was found that Timoshenko beam theory can be used for harmonic loading CDBs. Furthermore, replacement in general provided more ductility due to rubber elasticity property. Gravel replacement by 45% has the larger displacement values among the other types. Also, it has been noted that, the sensitive of concrete deep beams towards a/h ratio stills considerable for harmonic loads, i.e. minimizing the ratio leads to decrementing the deflection wave amplitudes.

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Behavior of Simply Supported and Continuous Concrete Deep Beams Reinforced with GFRP Bars

Cited by 12 publications

References 14 publications

Effects of the Concrete Strength and FRP Reinforcement Type on the Non-Linear Behavior of Concrete Deep Beams

Effects of the Concrete Strength and FRP Reinforcement Type on the Non-Linear Behavior of Concrete Deep Beams

Proposed prediction models for shear strength of fiber reinforced polymer reinforced concrete deep members without stirrups

Response of Rubcrete Continuous Deep Beams under Sinusoidal Loads

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