Theoretical Formula of Ultimate Shear Strength for RC Beams without Transverse Reinforcement by Using External Vertical Prestressing Rebars

Xue, Xingwei; Wu, Meizhong; Zhou, Peng; Zhou, Junlong

doi:10.1007/s12205-021-0911-2

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…A few theoretical studies pertaining to the prediction of the vertical prestressed shear capacity have been performed. Xue et al [42] established a shear strength prediction model for concrete beams without web reinforcement strengthening based on VPSBs by modifying the critical shear crack theory, which assumes the contribution of the shear strength, including VPSBs as stirrups, as well as the compression zone of concrete, dowelling action, aggregate interlock, and residual tensile strength. e compression zone of concrete, dowelling action, and residual tensile strength account for the effect of vertical compressive stress on the tensile strength of concrete.…”

Section: Introductionmentioning

confidence: 99%

Strengthening Shear Resistance of Beams without Web Reinforcements Using Vertical Prestressed Steel Bars

Liu¹,

Cui

Wang

et al. 2022

Advances in Materials Science and Engineering

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Ensuring the shear capacity of concrete structures is crucial. The vertical prestressed steel bar (VPSB) strengthening method is effective for improving the shear behaviour of concrete structures. Four concrete beams are investigated to reveal the effect of VPSBs on the shear capacity of concrete beams without web reinforcement. Test results indicate that the shear capacity of the test beam strengthened by VPSBs in the beam is significantly increased by more than 95%, and the failure mode of the test beam changes from diagonal tension failure to shear compression failure. Additionally, the results provide insights into the strengthening mechanism of VPSBs, i.e., the shear contribution of the VPSBs can be categorised into two stages. The vertical compressive stress provides shear contribution in the first stage and provides control in terms of crack development; meanwhile, in the second stage, the stirrup action by VPSBs contributes to shear.

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Section: Introductionmentioning

confidence: 99%

Strengthening Shear Resistance of Beams without Web Reinforcements Using Vertical Prestressed Steel Bars

Liu¹,

Cui

Wang

et al. 2022

Advances in Materials Science and Engineering

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“…EVPRs shared the shear force like stirrups (also supported by Altin et al (2003)) after the presence of critical shear crack (CSC). A theoretical model was established to predict the shear capacity of RC beams strengthened with EVPRs (Xue et al, 2021). Recently, it has been found that increasing the EVPR stirrup ratio can reduce the width of shear cracks and improve the shear resistance by numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Shear-flexural cracking strength of RC beams with external vertical prestressing rebars: Theoretical investigation and numerical simulation

Zhou

2021

Advances in Structural Engineering

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This paper presents a semi-theoretical empirical formula to predict the shear-flexural cracking strength of an RC beam enhanced with the external vertical prestressing rebar (EVPR) technique. Besides, nonlinear finite element models (FEM) created by software ABAQUS were used to analyze the effect of crucial parameters on the shear-flexural cracking strength. The parameters involve shear span-to-depth ratio, concrete strength, longitudinal tension reinforcement ratio, initial pulling force and spacing of EVPRs, and the vertical stiffness of the EVPR supports. Results show that the cracking strength increased linearly with the tensile strength of the concrete and the initial pulling force. The small shear span-to-depth ratio was predominantly conducive to the cracking strength. Adequate longitudinal tension rebars contributed to the cracking strength improvement. A reasonable EVPR spacing was recommended to ensure the cracking strength. Greater vertical stiffness of the EVPR supports can ensure higher compressive stress for the RC beam to improve the cracking strength.

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A Shear Strength Prediction Theory for Box Girder Strengthened by External Vertical Prestressing Reinforcements

Xue,

Xiu,

Cheng

et al. 2024

KSCE J Civ Eng

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Theoretical Formula of Ultimate Shear Strength for RC Beams without Transverse Reinforcement by Using External Vertical Prestressing Rebars

Cited by 4 publications

References 20 publications

Strengthening Shear Resistance of Beams without Web Reinforcements Using Vertical Prestressed Steel Bars

Strengthening Shear Resistance of Beams without Web Reinforcements Using Vertical Prestressed Steel Bars

Shear-flexural cracking strength of RC beams with external vertical prestressing rebars: Theoretical investigation and numerical simulation

A Shear Strength Prediction Theory for Box Girder Strengthened by External Vertical Prestressing Reinforcements

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