Torsional capacity of ultra-high-performance concrete beams using rectangle stirrup

Cao, Xia; Zhang, Weijia; Ren, Yi-Cheng; Fu, Feng; Li, Yuhua; He, Da-bo; Zheng, Yan

doi:10.1016/j.jobe.2023.106231

Cited by 2 publications

(6 citation statements)

References 24 publications

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“…Using steel fibers improved the concrete's tensile strength in addition to the stirrups' tension strength. It's obvious which ultimate torque increases using steel fibers, and this agrees with Gao et al [34,35].…”

Section: Resultssupporting

confidence: 88%

“…The crack width for these beams (SB-R, SB-4CR, SB-8CR, SB-12CR, SB-16CR and SB-20CR) was (2.8 mm, 2.5 mm, 2.35 mm, 2.1 mm, 1.75 mm and 1.35 mm) respectively at ultimate torque. This is in agreement with Gao et al [34,35] and Abdullah et al [45], those who showed that the number of cracks is increased and their width the decreases with the increase in the stirrups and steel fibers in concrete beams. The primary diagonal crack angle of these beams is also shown in Figure 13.…”

Section: Torsional Toughnesssupporting

confidence: 92%

“…The toughness of steel fiber concrete (SFC) beams (SN-R, SB-4CR, SB-8CR, SB-12CR, SB-16CR and SB-20CR) higher than that of the normal strength concrete (NSC) beams (NB-R, NB-4CR, NB-8CR, NB-12CR, NB-16CR and NB-20CR) by (363.56%, 392.52%, 277.29%, 264.58%, 215.82% and 239.97%) respectively, with the same reinforcement. Steel fibers increase the stiffness of concrete beams, as mentioned by many researchers, such as Hassan et al [38] and Gao et al [34,35]. The highest torsional toughness was (236.227 kN.m.deg.)…”

Section: Torsional Toughnessmentioning

confidence: 75%

“…The stiffness of steel fiber concrete (SFC) beams (SN-R, SB-4CR, SB-8CR, SB-12CR, SB-16CR and SB-20CR) higher than that of the normal strength concrete (NSC) beams (NB-R, NB-4CR, NB-8CR, NB-12CR, NB-16CR and NB-20CR) by (12.83%, 17.24%, 18.19%, 17.85%, 10.79% and 12.08%) respectively, with the same reinforcement. Steel fibers increase the stiffness of concrete beams, as mentioned by many researchers, such as Rao et al [37], Hassan et al [38] and Gao et al [34,35]. The cause is because the fibers of steel weren't fully pulled out of the concrete's matrix during this level, as well as the fibrous concrete linked through internal cross rods, stirrups, longitudinal rebar, and steel fibers, which appeared to exhibit a pseudo-hardening phenomenon [39,40].…”

Section: Torsional Stiffnessmentioning

confidence: 95%

“…It is an indicator of rigidity (a material property). The ultimate torque divided by the ultimate twist angle determines the ultimate torsional stiffness of beams [20,[34][35][36]. Table 5 shows the torsional stiffness of all beams.…”

Section: Torsional Stiffnessmentioning

confidence: 99%

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Innovative Method for Reinforcing Beams with Different Types of Concrete Using Cross-Rod Steel Bracing Under Pure Torsion

Abdullah,

Lateef

2024

Civ Eng J

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This study aimed to investigate the effectiveness of an innovative way to reinforce the concrete beams using cross-rod steel bracing under pure torsion. The experimental program consists of casting and testing eighteen concrete beams made of three types of concrete in the form of three groups, with the same dimensions for all beams (200×200×2000) mm. The parameters of the study included concrete types (normal strength, high strength, and steel fiber), as well as the number of internally cross rods (4, 8, 12, 16, 20). The experimental results showed that the number of internally cross-rod reinforcements and concrete type had an effect on ultimate torque, crack width, toughness, and stiffness. The torsional capacity of all concrete beams increased with the increase in internally cross-rod reinforcement. The ultimate torque of normal-strength concrete beams, high-strength concrete beams, and steel fiber concrete beams reinforced with twenty internally cross rods increased (88.34%, 53.20%, and 40.60%), respectively, compared to beams without cross rods in each type of concrete beam. Increasing the internally cross rod in all concrete beams effectively inhibited the development of crack width and improved torsional stiffness, especially in fibrous concrete beams that contained steel fiber. The torsional toughness of all concrete beams increased with the increase of internally cross-rod reinforcement, and it was higher in steel fiber concrete beams. The steel fiber concrete beams reinforced with internally cross-rod steel bracing have better torsional properties compared to ordinary concrete beams and high-strength concrete beams. Doi: 10.28991/CEJ-2024-010-04-06 Full Text: PDF

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Section: Resultssupporting

confidence: 88%

Section: Torsional Toughnesssupporting

confidence: 92%

Section: Torsional Toughnessmentioning

confidence: 75%

Section: Torsional Stiffnessmentioning

confidence: 95%

Section: Torsional Stiffnessmentioning

confidence: 99%

See 3 more Smart Citations

Innovative Method for Reinforcing Beams with Different Types of Concrete Using Cross-Rod Steel Bracing Under Pure Torsion

Abdullah,

Lateef

2024

Civ Eng J

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Experimental and Numerical Characterization of Non-Proprietary UHPFRC Beam—Parametric Analyses of Mechanical Properties

Osgouei,

Tafreshi,

Pourbaba

2023

Buildings

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Fabrication of ultra-high-performance concrete (UHPC) is costly, especially when commercial materials are used. Additionally, in contrast to conventional concrete, numerical procedures to simulate the behaviour of ultra-high-performance fibre-reinforced concrete (UHPFRC) are very limited. To contribute to the foregoing issues in this field, local materials were used in the fabrication process, while accounting for environmental issues and costs. Micro steel fibres (L: 13 mm, d: 0.16 mm, and ft: 2600 MPa; L: length, d: diameter, ft: tensile strength) were used in 2% volumetric ratios. Compression and indirect tests were carried out on cylindrical and prismatic beams according to international standards. To further enrich the research and contribute to the limited simulation data on UHPFRC, and better comprehension of the parameters, numerical analyses were performed using the ATENA software. Finally, nonlinear regression analyses were employed to capture the deflection-flexural response of the beams. The results were promising, indicating cost-effective fabrication using local materials that met the minimum requirements of UHFRC in terms of compressive strength. Furthermore, inverse analysis proved to be an easy and efficient method for capturing the flexural response of UHPFRC beams.

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Torsional capacity of ultra-high-performance concrete beams using rectangle stirrup

Cited by 2 publications

References 24 publications

Innovative Method for Reinforcing Beams with Different Types of Concrete Using Cross-Rod Steel Bracing Under Pure Torsion

Innovative Method for Reinforcing Beams with Different Types of Concrete Using Cross-Rod Steel Bracing Under Pure Torsion

Experimental and Numerical Characterization of Non-Proprietary UHPFRC Beam—Parametric Analyses of Mechanical Properties

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