Prediction model for the flexural strength of steel fiber reinforced concrete beams with fiber-reinforced polymer bars under repeated loading

Zhu, Haitang; Li, Zongze; Wen, Cuilian; Cheng, Shengzhao; Wei, Yunxiao

doi:10.1016/j.compstruct.2020.112609

Cited by 36 publications

(18 citation statements)

References 21 publications

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“…Meng et al [ 98 ] developed a simulation model to predict the bending performance of steel fibers across four stages (the initial cracking stage, cracking moment, crack development stage, and failure stage), and it produced acceptable outcomes for the bending deformation characteristics of SFRC according to a comparison with the data of several experiments. Zhu et al [ 99 ] subjected SFRC beams containing FRP bars to a four-point bending test with repeated loading to assess the flexural capacity. The findings suggested that an increase in the quantity of steel fibers produced promising outcomes.…”

Section: Application Of Steel Fibers In Structural Elementsmentioning

confidence: 99%

A Comprehensive Analysis of the Use of SFRC in Structures and Its Current State of Development in the Construction Industry

et al. 2022

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In recent years, concrete technology has advanced, prompting engineers and researchers to adopt advanced materials to improve strength and durability. Steel-fiber-reinforced concrete (SFRC) represents the substantial modification of concrete materials to improve their structural properties, particularly their flexural and tensile strength. Whether SFRC is stronger than conventional concrete depends on a variety of variables, including the volume, size, percentage, shape, and distribution of fibers. This article provides a comprehensive discussion of the properties of SFRC, such as durability, fire resistance, and impact resistance or blast loading, as well as the application of SFRC in structural members including beams, columns, slabs, and walls. The application of steel fibers in various types of concrete, including pre-stressed, pre-cast, self-compacting, and geopolymer concrete, was also examined in this comparative analysis review, and recommendations for the future scope of SFRC were identified.

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Section: Application Of Steel Fibers In Structural Elementsmentioning

confidence: 99%

A Comprehensive Analysis of the Use of SFRC in Structures and Its Current State of Development in the Construction Industry

et al. 2022

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“…As reinforced concrete structures are exposed to various environments, the steel rebar corrodes when moisture seeps into the concrete [ 2 ]. The corrosion of steel rebars in reinforced concrete structures can seriously affect the safety and durability of structures in harsh environments [ 3 , 4 ]. Therefore, the use of FRP (Fiber-Reinforced Polymer) rebar can be an effective solution to secure the performance and increase the service life of concrete structures [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Prediction of Effective Moment of Inertia of FRP Rebar-Reinforced Concrete by an Optimization Algorithm

Jang

Kim

2023

Materials

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FRP (fiber-reinforced polymer)-reinforced concrete members have larger deflection than reinforced concrete members because of the low modulus of elasticity of the FRP bar. In this paper, we proposed a new effective moment of inertia equation to predict the deflection of FRP-reinforced concrete members based on the harmony search algorithm. The harmony search algorithm is used to optimize a function that minimizes the error between the deflection value of the experimental result and the deflection value expected from the specimen’s specifications. In the experimental part, four GFRP (Glass Fiber-Reinforced Polymer)- and BFRP (Basalt Fiber-Reinforced Polymer)-reinforced concrete slab specimens were manufactured and tested. FRP-reinforced concrete slabs were reinforced with GFRP and BFRP rebars on spiral rib surfaces. The effects of the FRP reinforcement ratio and balanced reinforcement ratio (ρf/ρfb), the moment of inertia of the transformed cracked section and the gross moment of inertia (Icr/Ig), and the cracking moment and the maximum service load moment (Mcr/Ma) on the effective moment of inertia have been considered. The experimental results and predicted results of the flexural testing of concrete slabs reinforced with FRP rebars were compared, and the experimental results were in good agreement with the calculated values using the proposed effective moment of inertia equation.

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“…In addition, the loads of marine structural buildings are mostly repeated loads. Zhu et al [ 18 ] found that the load of FRP-reinforced SFRC beams were reduced by 10 % after three repeated cycles of loading and unloading. In summary, the existing literature has mainly studied the durability of FRP bars [ 19 , 20 ], and some studies have paid attention to the flexural performances of FRP-reinforced SFRC under long-term seawater immersion.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Deformation for Steel Fiber Concrete Beams with BFRP Tendons Eroded by Seawater under Cyclic Loading

Zhu

Chen

et al. 2022

Polymers

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Steel fiber-reinforced concrete (SFRC) beams with fiber-reinforced polymer (FRP) bars are promising new composite structures. To investigate the durability of BFRP-SFRC beams, eleven beams were fabricated and conducted via four-point bending tests under cyclic loading. The experimental variables included BFRP reinforcement ratios, pre-cracked widths and environments (Natural or Seawater erosion). Experiment results revealed that the load–deflection curves of BFRP-SFRC beams showed bilinear growth. With the increase in loading and unloading cycles, the peak load and energy consumption of the tested beams decreased, and the impact of loading and unloading cycles on the flexural performances of the BFRP-SFRC beams enhanced with the increase in displacement. Under the same load, as the pre-crack width increases, the deflection of the BFRP-SFRC beam decreases. The deflection of the beam with a pre-crack width of 0.4 mm was 1.34 times than that of the beam without a pre-crack at the load of 100 kN. What is more, the pre-crack width had a bad effect on the energy consumed by the BFRP-SFRC beams. Compared with no pre-crack beam, the energy consumed by the beams with 0.02, 0.2 and 0.4 mm pre-crack width were decreased by 1.5%, 7.8% and 11.0% at the 18 mm displacement, respectively. Significantly, the effect of sea water erosion on the energy consumption of tested beams with high BFRP reinforcement ratios were smaller than that of tested beams with low BFRP reinforcement ratios. Finally, a calculation model of deformation of BFRP-SFRC beams under seawater erosion environments was proposed based on the effective moment of inertia methods. Compared with the existing calculation methods, this model was better correlated with the experimental results.

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Prediction model for the flexural strength of steel fiber reinforced concrete beams with fiber-reinforced polymer bars under repeated loading

Cited by 36 publications

References 21 publications

A Comprehensive Analysis of the Use of SFRC in Structures and Its Current State of Development in the Construction Industry

A Comprehensive Analysis of the Use of SFRC in Structures and Its Current State of Development in the Construction Industry

Comparison of the Prediction of Effective Moment of Inertia of FRP Rebar-Reinforced Concrete by an Optimization Algorithm

Evaluation of Deformation for Steel Fiber Concrete Beams with BFRP Tendons Eroded by Seawater under Cyclic Loading

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