Uniaxial tensile properties of steel fiber-reinforced recycled coarse aggregate shotcrete: Test and constitutive relationship

Zhang, Xuanhao; Ma, Chong; Liu, Can; Zhang, Ke; Lu, Jun; Liu, Chuanqi

doi:10.1016/j.conbuildmat.2023.134202

Cited by 2 publications

(3 citation statements)

References 48 publications

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“…Therefore, the stiffness recovery factor of the plastic damage model was calculated numerically by taking the default values wc = 1 and wt = 0. UHPC is also modelled using the plastic damage model, and the intrinsic relationships of UHPC in compression and tension are shown in Equations ( 2) and (3) [30][31][32].…”

Section: Materials Modellingmentioning

confidence: 99%

Mechanical Characteristics of Cracked Lining Reinforced with Steel Plate–UHPC Subjected to Vertical Load

Wei,

Ding,

Shen

et al. 2024

Buildings

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The steel plate reinforcement method is widely used for strengthening damaged linings. Nevertheless, low durability is one of the disadvantages of the steel plate reinforcement method, which uses epoxy resin as the interface binder. To enhance the load-bearing performance and strengthening effect of steel-plate-reinforced structures, this study introduced ultra-high performance concrete (UHPC) as the reinforcing bonding layer and proposed a novel method for steel plate–UHPC reinforcement of cracked linings. A mechanical performance model test was conducted on a 1/5 scale lining model using a loading test device to evaluate the load-bearing performance and stress deformation of both conventional steel plate and steel plate–UHPC reinforced cracked linings. The characteristics, mechanisms of failure, and impacts of strengthening of the steel plate reinforcement method and steel plate–UHPC reinforcement method for cracked linings were compared. A numerical simulation model was developed to investigate the reinforcement effect of cracked linings using steel plate–UHPC reinforcement. The analysis included examining the influence of steel plate thickness, UHPC bonding layer thickness, and reinforcement timing. Model test results show that the overall damage mode of the steel plate–UHPC-reinforced structure had good elastic–plastic behaviour, and the deformation and damage process under the vertical concentrated load can be divided into four typical phases. Compared with the traditional steel plate reinforcement, the ultimate load-carrying capacity and ductility of the steel plate–UHPC-reinforced structure were increased by 53% and 366%, respectively, showing significantly better load-carrying capacity and deformation performance. Numerical simulation results show that the reinforced structure’s load-carrying capacity and stiffness enhancement rate increased non-linearly with the increase in UHPC layer thickness and steel plate thickness. However, reasonable reinforcement timing exists for steel plate-UHPC reinforcement, and too late reinforcement timing leads to a decrease in structural load-carrying capacity and stiffness enhancement rate.

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Section: Materials Modellingmentioning

confidence: 99%

Mechanical Characteristics of Cracked Lining Reinforced with Steel Plate–UHPC Subjected to Vertical Load

Wei,

Ding,

Shen

et al. 2024

Buildings

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“…The main aim of using reinforcing materials such as steel fibers in cementitious materials is to improved their tensile strength, energy absorption, and ductility of cement matrixes 7 , 8 . Steel fiber, basalt fiber, polypropylene fiber, glass fiber, aluminum fiber, and polyethylene fiber are the common types of fibers used to improve shotcrete and concrete performance 9 – 11 . Steel fiber-reinforced shotcrete was introduced in the 1970s and has since become an important part of tunneling operations, especially in the United States and Europe 12 – 15 .…”

Section: Introductionmentioning

confidence: 99%

“…Steel fiber-reinforced shotcrete was introduced in the 1970s and has since become an important part of tunneling operations, especially in the United States and Europe 12 – 15 . Zhang et al 9 studied the uniaxial tensile characteristics and stress–strain behaviour of steel fiber-reinforced recycled coarse aggregate shotcrete. The mechanical properties of steel fiber-reinforced concrete in high temperature condition are studied by Li and et al 16 and Caballero-Jorna et al 16 .…”

Section: Introductionmentioning

confidence: 99%

Assessment of mechanical behavior of sprayed concrete reinforced with waste tire textile fibers

Khosh,

Atapour

2024

Sci Rep

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The primary objective of this research is to assess the mechanical properties of shotcrete or sprayed concrete reinforced with waste tire textile fibers (WTTFs). Shotcrete is extensively employed in civil and mining engineering projects for support systems. This study examines the physical and mechanical characteristics of shotcrete samples, both without fibers and reinforced with WTTFs, including density, water absorption, volume of permeable voids, ultrasonic pulse velocity, uniaxial compressive strength, and splitting tensile strength. The reinforced samples consist of WTTF fibers at 0.5%, 1%, and 1.5% concentrations. Test results demonstrate that the inclusion of waste tire textile fibers enhances the mechanical properties of shotcrete, particularly its deformability and energy absorption capacity. Based on the test outcomes, a 1% fiber concentration is recommended as the most suitable ratio for utilizing waste tire textile fibers in shotcrete. Furthermore, these flexible fibers do not impede shotcrete pumping or spraying capabilities.

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Uniaxial tensile properties of steel fiber-reinforced recycled coarse aggregate shotcrete: Test and constitutive relationship

Cited by 2 publications

References 48 publications

Mechanical Characteristics of Cracked Lining Reinforced with Steel Plate–UHPC Subjected to Vertical Load

Mechanical Characteristics of Cracked Lining Reinforced with Steel Plate–UHPC Subjected to Vertical Load

Assessment of mechanical behavior of sprayed concrete reinforced with waste tire textile fibers

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