Torsion Strengthening of RC Beams with External Lateral Pressure Using Steel Plates

Fawzy, Khaled; Farouk, Mohamed

doi:10.1007/s40996-020-00536-0

Cited by 2 publications

(3 citation statements)

References 16 publications

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“…The findings demonstrate that ANNs can accurately model the torsional behaviour of RC beams [10]. Fawzy et al (2021), investigated the beams torsional behavior when subjected to external lateral pressure over their lengths [11]. Shatarat et al (2020), investigated the torsional mechanism using unwelded and welded transverse RFT.…”

Section: Introductionmentioning

confidence: 93%

Enhanced Torsion Mechanism of Small-Scale Reinforced Concrete Beams with Spiral Transverse Reinforcement

Mahmoud

Mohammed²,

Salem³

2022

Civ Eng J

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The nonlinear torsional behaviour of small-scale reinforced concrete (RC) beams with continuous staggered spiral as transverse reinforcement stirrups is experimentally investigated. Twelve miniatures RC beams were tested under torsion load considering the closed shape of stirrups and compared with continuous staggered spiral ones. All miniatures beams were scaled down to be one-eighth the prototype beam size. The main parameters considered in this research are stirrup spacing and its configurations. Small scale RC beams were taken into account in the existing study because of their construction simplicity and financial feasibility. Mortar without coarse aggregate was applied instead of concrete to reduce the size effect of applying small scale models. Ongoing research trials have been carried out to obtain an efficacious approach to boost torsion failure mechanisms because brittle torsion failure of RC structural elements should be avoided. This study emphasized boosted torsion capacity, dissipated energy, and helical crack propagation. During testing, the primary cracking torsion moment, ultimate torsion moment, peak twist angle, and failure mechanism of the beams were inspected. The use of spiral stirrups showed great enhancement of the torsional behaviour of samples. It was observed that using spiral stirrups rather than closed stirrups could result in a substantial increase in torsion capacity and dissipated energy of 87.7% and 89.8%, respectively. As a result, the predicted capacities of the RC beams prototype were estimated in detail, taking account the scale down factor implemented by the authors. Values obtained based on international specifications and guidelines were used to compare the experimental results. Doi: 10.28991/CEJ-2022-08-11-019 Full Text: PDF

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Section: Introductionmentioning

confidence: 93%

Enhanced Torsion Mechanism of Small-Scale Reinforced Concrete Beams with Spiral Transverse Reinforcement

Mahmoud

Mohammed²,

Salem³

2022

Civ Eng J

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“…The extensive experimental work on the torsional behavior of RC shear walls under pure torsion was limited. The previous studies of torsional behavior of RC members were conducted on beams 26–29 . Chalioris and Karayannis 30 carried out an experimental study about the pure torsional behavior of RC beams with the different ratio of steel fiber and different reinforcement configuration.…”

Section: Introductionmentioning

confidence: 99%

“…The previous studies of torsional behavior of RC members were conducted on beams. [26][27][28][29] Chalioris and Karayannis 30 carried out an experimental study about the pure torsional behavior of RC beams with the different ratio of steel fiber and different reinforcement configuration. Test results indicated that the RC beam with steel fiber exhibited the more adequate torsional performance compared to RC beam without steel fiber.…”

Section: Introductionmentioning

confidence: 99%

Torsional behavior of hybrid fiber reinforced shear walls an experimental point of view

Bayrak

Kılıç

Maali

et al. 2023

Structural Concrete

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The shear wall system is one of the most commonly used lateral load‐resisting systems in reinforced concrete (RC) high‐rise buildings. The present work is designed to investigate the behavior of reinforced shear walls upon their hybrid fiber ratio, the horizontal reinforcement ratio, and for the reinforcement aspect ratio. For this purpose, nine‐shear walls were manufactured. The same longitudinal reinforcement ratio and the steel and carbon fibers were the main design concept. Withal, the self‐compacting concrete with fiber hybridization was the general perspective for the RC. All the shear wall models were inspected not only for torsion, but also for the energy dissipation capacity, crack propagation, etc. Torsional moment capacity increased, when the hybrid fiber ratio rose up from 0% to 1.0% and then 1.5%. However, this increase was larger in case of increasing the hybrid fiber ratio from 0% to 1.0%. Increasing the hybrid fiber ratio from 1.0% to 1.5% did not result in a performance increase as in the first case. Increasing the fiber ratio from 0% to 1% and from 1% to 1.5% increased the maximum torsional moment between 7.39% and 33.41%. Torsional moment and twist angle capacities increase with the increase in hybrid fiber and horizontal reinforcement ratio and the decrease in the aspect ratio in RC shear walls. Withal, the energy absorption capacity, ductility, and stiffness are also increased as the hybrid fiber ratio. Increasing the hybrid fiber ratio decreased the crack density in the plastic hinge region. Decreasing the aspect ratio from 1.5 to 1.25 increased the dissipation energy capacity between 68.75% and 100%. The addition of 1.0% fiber, a significant increase in the value of ~30% and 53% was achieved stiffness after the crack.

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Torsion Strengthening of RC Beams with External Lateral Pressure Using Steel Plates

Cited by 2 publications

References 16 publications

Enhanced Torsion Mechanism of Small-Scale Reinforced Concrete Beams with Spiral Transverse Reinforcement

Enhanced Torsion Mechanism of Small-Scale Reinforced Concrete Beams with Spiral Transverse Reinforcement

Torsional behavior of hybrid fiber reinforced shear walls an experimental point of view

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