Development of Torsional Strength Model for Steel Fiber Reinforced Concrete Beams with Transverse Reinforcement

Kryzhanovskiy, Kirill; Zhang, Dichuan; Ju, Hyunjin; Kim, Jong

doi:10.1007/s40999-023-00816-6

Int J Civ Eng

2023

DOI: 10.1007/s40999-023-00816-6

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Development of Torsional Strength Model for Steel Fiber Reinforced Concrete Beams with Transverse Reinforcement

Kirill Kryzhanovskiy

Dichuan Zhang

Hyunjin Ju

et al.

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2024

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Cited by 2 publications

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Behavior of Fiber Reinforced Concrete Beams with Inadequate Torsion Steel under Pure Torsion

Tetik,

Kaya

2024

tjce

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To investigate the relationship between reinforced concrete beams under pure torsion and steel fiber usage, 16 large-scaled reinforced concrete beams with inadequate torsion steel were designed and produced. For experiments, a new test setup was designed to allow specimens to have rotational movement on one end and axial movement on the other end. The variables were selected as 300 and 400 mm spacings of transverse reinforcements and 0.0%, 0.3%, 0.6%, 0.9%, 1.2%, and 1.5% by volume of the mixture as steel fiber ratios. Cracking torque, maximum torque and ultimate torque values were obtained experimentally, and torque-twist curves and energy dissipation capacities were determined. Findings were compared to indicate the relationship between variables. Results showed that certain values of steel fiber ratio as a replacement material for relevant spacing of transverse reinforcements.

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Behavior of Fiber Reinforced Concrete Beams with Inadequate Torsion Steel under Pure Torsion

Tetik,

Kaya

2024

tjce

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Strength Model for Prestressed Concrete Beams Subjected to Pure Torsion

Ju,

Jung,

Cho

2024

Buildings

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A torsional strength model for prestressed concrete beams was proposed considering the initial crack angle, principal stress angle, and longitudinal strain, which are affected by the axial stress induced by the effective prestress. The use of the torsional effective thickness was also proposed to calculate the torsional strength of prestressed concrete beams by considering the effect of prestress. The shear element in the torsional member was simplified under the assumption that the principal tensile stress and principal compressive strain were negligible in the ultimate state. The torsional strength was determined when the principal compressive stress or shear stress at the crack surface in the shear element reached the failure criterion according to the multipotential capacity model, which considers concrete crushing and aggregate interlocking as the main resistances to the applied load. The proposed strength model was verified using test specimens collected from existing experimental studies. The proposed model accurately evaluated the torsional strength of prestressed concrete beam specimens, regardless of the key variables of the prestressed concrete specimens, where the mean value of the tested results to the calculated torsional strengths was 1.123, and the corresponding coefficient of variation was 17.7% for 104 prestressed concrete beam specimens, while the ACI 318-19 torsional design method gave the mean and coefficient of variation of 0.880 and 24.3%, respectively.

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Development of Torsional Strength Model for Steel Fiber Reinforced Concrete Beams with Transverse Reinforcement

Cited by 2 publications

References 30 publications

Behavior of Fiber Reinforced Concrete Beams with Inadequate Torsion Steel under Pure Torsion

Behavior of Fiber Reinforced Concrete Beams with Inadequate Torsion Steel under Pure Torsion

Strength Model for Prestressed Concrete Beams Subjected to Pure Torsion

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