Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips

Atea, Rafid Saeed

doi:10.1016/j.cscm.2017.03.002

Cited by 10 publications

(10 citation statements)

References 1 publication

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“…At the first time, ACI 318-63 Code provision mentioned one sentence, which recommended using the closed stirrups and in each corner of the closed stirrup, one longitudinal bar should be used. e torsion design provisions were introduced in 1968 and 1969 through a series of papers by the ACI Committee and were consequently adopted in the ACI 1971 and late [12]. e torsion design methods for combined shear, torsion, and bending in concrete members were reviewed in ACI 318-95 Code provision and remain fundamentally unchanged since then.…”

Section: Torsion Design Development In the Aci 318-08 Codementioning

confidence: 99%

Torsional Behavior of High Strength Concrete Members Strengthened by Mixed Steel Fibers

Mures

Ahmed

Chkheiwer

2021

Journal of Engineering

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Twelve mixing steel fibers-reinforced high strength concrete beams were experimentally tested under pure torsion to investigating the concrete member torsional behavior. The first cracking torque, ultimate torsional resistance, crack patterns, effect of steel fiber ratio, effects of shape and size of hollow cross-section, and effect of stirrups reinforcement were discussed. The ratio of mixing steel fiber, different shape and size of hollow cross-section, and ratio of stirrups reinforcement were considers as major parameters. The results are shown that the width of cracks decreases and the cracks number increases with mixing steel fibers ratio increased. The first cracking torque and ultimate torsion load increased with decrease in the hollow cross-section area of high strength concrete members strengthened by steel fibers.

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Section: Torsion Design Development In the Aci 318-08 Codementioning

confidence: 99%

Torsional Behavior of High Strength Concrete Members Strengthened by Mixed Steel Fibers

Mures

Ahmed

Chkheiwer

2021

Journal of Engineering

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“…Meleka et al [10] carried out an experimental study for the improvement of the torsional behavior of reinforced self-compact concrete beams using GFRP wrapping of different configuration by testing eleven RC beams under pure torsion. Atea [11] presented an experimental investigation of the effectiveness of using carbon fiber reinforced polymer (CFRP) as externally bonded reinforcement by testing twelve reinforced concrete T-beams under pure torsion. Kandekar and Talikoti [12] evaluated the effectiveness of the use of aramid fiber as an externally bonded reinforcement by testing a total of 12 RC rectangular beams under torsional moment.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Reinforced Concrete Beams Strengthened By GFRP Composites Subjected to Combined Bending and Torsion – Experimental Study

Othman

Meleka

Heiza

et al. 2021

ERJ. Engineering Research Journal

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This paper presents an experimental investigation on the behavior of reinforced concrete beams subjected to combined bending and torsion, strengthened by using externally bonded glass fiber reinforced polymer (GFRP). The experimental work includes investigation of three RC beams tested under combined bending and torsion. One beam is kept without strengthening as a control specimen, while the other two beams are strengthened using GFRP wrapping with different configurations. All RC beams have the same concrete grade and steel reinforcement. The strengthened beams in the experimental study include full wrapping with continuous GFRP sheets and discrete GFRP strips with the same GFRP reinforcement ratio. The load-mid span deflection curves and the torsional moment-twist angle curves were recorded to failure. The crack patterns and failure modes of the RC beams were also indicated. The Experimental results reveal that strengthening by using GFRP wrapping helped effectively in improving the overall performance of the strengthened beams.

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“…Salama et al [9] carried out an experimental and theoretical investigation on torsional behavior of T-shaped RC beams with large web openings, the study ̓ s parameters were flange width, flange thickness, and opening height. Other researches [10][11][12][13][14][15] studied the strengthening of concrete beams with opening subjected to pure torsion using Fiber Reinforced Polymers. However, most of these researches focused on the geometric dimensions of the openings and did not focus on the effect…”

Section: Introductionmentioning

confidence: 99%

Experimental and Analytical Investigation of Reinforced Concrete Beams with Large Web Opening under Pure Torsion

Abdel-Kareem¹,

Salam²

2020

IJAEMS

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This research presents the experimental and analytical results for reinforced concrete (RC) beams with rectangular large web openings under pure torsion. Fifteen specimens were tested; one solid specimen without opening, six specimens without reinforcement around opening as if an opening is created in an existing beam; where the investigated parameters were opening width, opening height and opening eccentricity from the longitudinal beam axis, and eight specimens with reinforcement installed around the opening to reduce the effect of the opening on the torsional behavior; where the investigated parameters were the shapes and amounts of the reinforcement around the opening. The test results showed that installing stirrups and horizontal reinforcement bars in the chords above and below the openings efficiently increased the cracking and ultimate torque of the tested specimens; where using inclined stirrups by 45º to the longitudinal axis of the specimens increased the ultimate torque to be about 90% of that of the solid specimen. Installing closed stirrups around the opening had small effect on enhancing the torsional behavior of the tested specimen compared with using horizontal and vertical reinforcement bars. The analytical model based on Modified Variable Angle Truss Model (MVATM) used to obtain the torque-rotation curves for beams under pure torsion was modified to incorporate the beams with large web opening which have different arrangements of reinforcement around the opening. MATLAB program language was used to obtain the analytical torque-rotation curves for the specimens that have reinforcement around the opening which were in good agreement with the experimental results.

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Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips

Cited by 10 publications

References 1 publication

Torsional Behavior of High Strength Concrete Members Strengthened by Mixed Steel Fibers

Torsional Behavior of High Strength Concrete Members Strengthened by Mixed Steel Fibers

Behavior of Reinforced Concrete Beams Strengthened By GFRP Composites Subjected to Combined Bending and Torsion – Experimental Study

Experimental and Analytical Investigation of Reinforced Concrete Beams with Large Web Opening under Pure Torsion

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