Effect of Variables on Shear Strength of Concrete Beams

Rebeiz, Karim S.; Fente, Javier; Frabizzio, Michael A.

doi:10.1061/(asce)0899-1561(2001)13:6(467)

Cited by 12 publications

(4 citation statements)

References 20 publications

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“…The shear strength of concrete beams has generated a lot of research and debate since the turn of the 19 th century [1]. The problem has been studied by many researchers both experimentally and theoretically [2,3,4,5].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Shear Behavior of High-Strength Concrete Beams with High-Strength Stirrups

Shi

Tian

Hou

2010

AMR

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This paper presents an experimental study of shear behavior of simply supported HSC beams reinforced with high-strength stirrups under monotonic concentrated loading. Six specimens with 150×300 mm square cross section were tested. The effects of three variables such as the stirrup ratio, stirrup yield strength and average confining stress are studied. Based on test results, the shear behavior of HSC beams with high-strength stirrups was evaluated. Combined with other test results, shear strength measured in test are compared with the values calculated according to the expressions proposed in this paper and in Code for design of concrete structures of China (GB 50010-2002). The study concludes that shear capacity is sparingly estimated by the Code for design of concrete structures of China (GB 50010-2002) when the average confining stress below 3MPa, but it is emphasis on insecurity when the average confining stress exceeds 3MPa. The empirical equation proposed in this paper for predicting the shear strength of HSC beams with high-strength stirrups is appropriate.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of Shear Behavior of High-Strength Concrete Beams with High-Strength Stirrups

Shi

Tian

Hou

2010

AMR

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“…This is due to the reduced effectiveness of the longitudinal steel in controlling crack widths in the deeper elements. Rebeiz et al (2001) concluded that the tensile reinforcement ratio correlated better with the cracking shear strength than with the ultimate shear strength in the case of long beams (a/d > 2.5). The effect of the tensile reinforcement ratio on the cracking shear strength is negligible in the case of short beams.…”

Section: Effect Of Longitudinal Reinforcement Ratiomentioning

confidence: 99%

“…These higher dowel forces, together with the highly concentrated bond stresses in higher strength concrete beams, result in higher bond-splitting stresses where the shear cracks cross the longitudinal tension bars. Rebeiz et al (2001) studied the effect of the concrete compressive strength on the shear strength.…”

Section: Effect Of Concrete Compressive Strengthmentioning

confidence: 99%

Shear strength of glass fiber reinforced polymer – reinforced concrete continuous beams without transverse reinforcement

Mahmoud

El-Salakawy

2015

Can. J. Civ. Eng.

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Continuous beams represent main structural elements in most reinforced concrete (RC) structures such as parking garages and overpass bridges. Deterioration of such structures due to corrosion of steel reinforcement is common in North America. To overcome the corrosion problems, the use of fiber-reinforced polymer (FRP) bars and stirrups becomes a viable alternative to steel reinforcement. However, to date, the shear behaviour of FRP-RC continuous beams has not been explored yet. As such, the objective of this study is to investigate the shear behaviour of such beams.In this study, twenty four full-scale continuous concrete beams were constructed and tested. The test beams had rectangular cross section with 200-mm width and a height of 300, 550 or 850 mm and were continuous over two equal spans. The main investigated parameters were concrete strength, type and ratio of longitudinal reinforcement, type and ratio of transverse reinforcement and beam effective depth. Moreover, a 3-D nonlinear finite element model (FEM) was constructed to simulate the behaviour of FRP-RC continuous beams. The model was verified against the experimental results and validated against test results from previous studies. Then, the verified/validated model was used to conduct a parametric study to investigate the effect of a wide range of the parameters on the shear behaviour of GFRP-RC beams.The experimental and FEM results showed that shear-critical GFRP-RC continuous beams exhibited moment redistribution. Also, it was observed that increasing the concrete strength and the longitudinal reinforcement ratio increased the shear strength significantly. Moreover, the presence of GFRP stirrups significantly enhanced the shear strength of the tested beams.Regarding the size effect, test results showed that there was adverse or no size effect on the shear Abstract ii strength of GFRP-RC continuous beams when they failed in the interior shear span while beams failed in the exterior shear span exhibited clear size effect. Furthermore, a comparison between the test results and the provisions of the available models and FRP standards and design guidelines in North America revealed that these design provisions can be safely applied to continuous beams.All thanks are due to the Almighty ALLAH, the Most-Gracious, and the Most-Merciful. Without his guidance and help, I would not be able to complete this work.

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“…Although there has been a lot of study on the shear strength of beams without stirrups, it is still up for discussion how the key factors affect the ultimate shear strength Vu and cracking shear strengths Vc. In many cases, the a/d ratio has a great effect on Vu, but it has little effect on Vc [4]. However, the shear resistance of the beam typically declines as beam section height rises [5]- [8].…”

Section: Introductionmentioning

confidence: 99%

Shear Capacity of Reinforced Concrete Beams Without Shear Reinforcement: A Review

Ibraheem,

M. Rasheed

2023

J. eng. sustain. dev.

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Shear failure in reinforced concrete beams has gained excessive study, particularly beams without stirrups. Because shear failure is considered the most serious due to it occurring suddenly without warning. Because of the seriousness of the matter concerning shear failure, many researchers are looking to use additive materials that differ from traditional concrete constituents in order to improve the shear resistance of the beams, such as the use of silica fume, steel fiber, metakaolin, and many others. The current studies focused on understanding the resistance provided by the interlocking forces between the aggregate and that provided by the non-cracked compression zone, with the use of some materials that are intended to improve the properties of concrete. This paper presents a review of the previous literature that included studying the mechanism and behavior of shear failure of concrete beams without web reinforcement and also includes a presentation of the most important equations used to predict the shear capacity of concrete beams, especially those without stirrups, to understand the mechanism of failure and to know the most important factors affecting the failure of shear.

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Effect of Variables on Shear Strength of Concrete Beams

Cited by 12 publications

References 20 publications

Experimental Study of Shear Behavior of High-Strength Concrete Beams with High-Strength Stirrups

Experimental Study of Shear Behavior of High-Strength Concrete Beams with High-Strength Stirrups

Shear strength of glass fiber reinforced polymer – reinforced concrete continuous beams without transverse reinforcement

Shear Capacity of Reinforced Concrete Beams Without Shear Reinforcement: A Review

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