The Use of Swimmer Bars as Shear Reinforcement in Reinforced Concrete Beam

Al-Nasra, Moayyad; Asha, Naem; Najmi, Abdelqader; Abu-Lebdeh, Taher

doi:10.3844/ajeassp.2013.87.94

Cited by 7 publications

(5 citation statements)

References 2 publications

(2 reference statements)

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“…Stirrups are used mightily at the high shear zones. The cost and time required for stirrups installation depended on the congestion near the supports of the reinforced concrete beams [1][2][3]. The swimmer bar system is considered a new technique of shear reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Shear Behaviour of R. C Beams Reinforced With Swimmer Bars

Samie

Hassanean

adel

2022

JES. Journal of Engineering Sciences

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Designers have to be very careful with respected to shear requirements in reinforced concrete (R.C.) elements due to their riskiness. Shear failure in R.C. beams is considered an undesirable failure mode because shear cracks develop without any warning. Swimmer bars are web reinforcement system alternatives for traditional shear reinforcement. Swimmer bars are small diagonal bars, with both ends bend over horizontally and tied with top and bottom reinforcement. The system of swimmer bars can be spliced, welded, or bolted and arranged in one or two rows. In this paper, an experimental study is carried out to investigate the shear behaviour of R.C beams which reinforced with swimmer bars as web reinforcement. Fifteen R.C beams are experimentally tested under monotonic load to study the effect of the number of swimming bars, type of splice, splice length and concrete strength on shear behaviour. The test results showed that using swimming bars as shear reinforcement increases the shear strength, stiffness, toughness as well as decreasing crack width, deflection values and the deformability of the tested beams.

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Section: Introductionmentioning

confidence: 99%

Shear Behaviour of R. C Beams Reinforced With Swimmer Bars

Samie

Hassanean

adel

2022

JES. Journal of Engineering Sciences

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“…Wind energy has become the most promising green energy compared to traditional sources. The foundation of Offshore Wind Turbines (OWT) represents the predominant item for this structure type regarding both cost and installation procedure, especially when construction in zones of deeper seawater or when the increasing distance to shore [1], [2]. Also, the construction of the foundation represents the major number of materials and generates most of the CO2 emissions in cement production [3].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Tabular Pile lateral resistance with external wings addition

Helal

Mohamed

Khalil

2021

JES. Journal of Engineering Sciences

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The foundations for offshore wind turbines represent the main item either for cost or installation process, and the lateral resistance of tabular piles is the main factor for its design. Therefore, studies for consistent and efficient foundations have become essential for offshore wind turbines when using traditional mono-pile foundations under practical and environmental conditions. This research discusses the increase in the lateral behaviour of open tabular piles with the addition of external wings near the ground level with specific dimensions. Four wings were added to the exterior wall of the open-ended pipe pile at equal angles 90 degrees. The wings length varied from 0.25 to 0.5 of the pile diameters. Each wing length is studied with two depths of 1.25, and 2.5 pile diameter. The numerical analysis was verified with published results of centrifugal tests. The successive parametric study discussed the feasibility of the added wings. Inclusive, the resultant load direction was considered as changed between 0 to 45o with 5 degrees to the wing's orientation horizontally

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“…These swimmer bars added significant shear resistance [3]. Creative pyramid swimmer bars were used [4]. The results were compared with the traditional slab reinforcement.…”

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confidence: 99%

“…Swimmer bars were used effectively to improve the shear strength of the reinforced concrete beams [10,11]. Several attempts to replace the welds in the swimmer bars due to the uncertainty in the performance of the welds n the log run were explored [12.13].…”

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confidence: 99%

The Use of Space Swimmer Bars as Shear Reinforcement in Reinforced Concrete Beams

Al-Nasra¹

2017

IJET

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Abstract--The sudden nature of shear failure in reinforced concrete beams is undesirable and requires special attention. This undesirable mode of failure pushes the design engineers to use higher factor of safety against the shear forces. Several alternatives to the traditional stirrups were introduced in the past including the concept of the swimmer bars. This study focuses on special kind of swimmer bars. The new swimmer bars system used in this study is called space swimmer bars system which requires no welding to be assembled. The space swimmer bars concept is new and effective in improving the shear performance of reinforced concrete beams. The results of this study will be compared with the traditional stirrups, as well as the welded swimmer bars. The space swimmer bar is basically a reinforcing bar bent several times in the three dimensions forming special configuration along with its coupling swimmer bar. This configuration makes the shear reinforcement system act as plane-crack interceptor rather than linear bar-crack interceptor. This new system is not only effective in taking care of the shear forces, but also it is economical compared to the traditional stirrups and the welded swimmer bars. There is no available data to show the performance of the welded swimmer in the long run, but this new type of swimmer bars system requires no welds. In addition, welding shear reinforcement bars does not seem to be desirable in the construction engineering practice. Several beams will be tested. One group of beams are reinforced with standard traditional stirrups as shear reinforcement and they are used as control samples. The second group of beams used welded swimmer bars as shear reinforcement system. The third group of beams used the new space swimmer bars as alternative to the existing shear reinforcement systems in reinforced concrete beams. The results of the three groups of beams will be presented. Flexural cracks as well as shear cracks will be monitored with the increase in the applied load. The deflection at the mid-span of the beam will also be monitored as the applied load is gradually increased.Keyword-Space swimmer bar, Deflection, Shear, Crack, Stirrup I. INTRODUCTION The main objective of the design of reinforced concrete beams is safety. The sudden failure mode requires higher factor of safety. The design engineer has to make sure that the mode of failure is acceptable and gives enough warning before failure. The shear failure is not one of the desirable mode of failures and should be avoided. Reinforced concrete beams are one of the common structural elements that carry transversal loads mainly by flexure and shear. The common design approach is to design the beam for flexure then design the beam for shear. The available design codes emphasizes on the ductile flexural failure by reducing the amount of steel reinforcement in the tension area, in order to make sure that the longitudinal tension bars yield first. While the design for shear focuses on providing enough shear resistance exceeding the ...

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The Use of Swimmer Bars as Shear Reinforcement in Reinforced Concrete Beam

Cited by 7 publications

References 2 publications

Shear Behaviour of R. C Beams Reinforced With Swimmer Bars

Shear Behaviour of R. C Beams Reinforced With Swimmer Bars

Enhancement of Tabular Pile lateral resistance with external wings addition

The Use of Space Swimmer Bars as Shear Reinforcement in Reinforced Concrete Beams

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