Comparative Study of Steel-FRP, FRP and Steel-Reinforced Coral Concrete Beams in Their Flexural Performance

Wang, Lei; Zhang, Jiwang; Huang, Changshi; Fu, Feng

doi:10.3390/ma13092097

Cited by 17 publications

(14 citation statements)

References 33 publications

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“…Raed et al [ 17 ] believe that the assumption of plane section remain plane in the calculation of deflection of FRP reinforced concrete beams and slabs under high-level load will lead to a significant reduction in the rigidity of FRP reinforced concrete members, resulting in significant deflection. Wang et al [ 18 ] found that the flexural performance of concrete beams of different types of reinforcement is significantly different, and the application of FRP reinforcement to different types of concrete is also different. The existing calculation model is difficult to accurately predict their flexural performance.…”

Section: Introductionmentioning

confidence: 99%

Short-Term Flexural Stiffness Prediction of CFRP Bars Reinforced Coral Concrete Beams

et al. 2021

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FRP (Fiber Reinforced Polymer) Bar reinforced coral concrete beam is a new type of structural member that has been used more and more widely in marine engineering in recent years. In order to study and predict the flexural performance of CFRP reinforced coral concrete beams, the flexural rigidity, crack morphology and failure mode of concrete were studied in detail. The results show that under the condition of similar reinforcement ratio, the flexural rigidity of CFRP reinforced coral concrete beam is significantly lower than that of ordinary reinforced concrete beam. Increasing the cross-section reinforcement ratio within a certain range can increase the bending stiffness of the test beam or reduce the deflection, but the strength utilization rate of CFRP reinforcement is greatly reduced. The short-term bending stiffness of the CFRP reinforced coral concrete beam calculated by the existing standard formula is obviously higher. This paper proposes a modified formula for introducing the strain inhomogeneity coefficient (ψ) of CFRP bars and considers the relative slip between CFRP bars and coral concrete to predict the short-term flexural stiffness of coral concrete beams reinforced by CFRP bars. The formula was verified with the test results, and it was proved that the formula has a good consistency with the test results.

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Section: Introductionmentioning

confidence: 99%

Short-Term Flexural Stiffness Prediction of CFRP Bars Reinforced Coral Concrete Beams

et al. 2021

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“…Because of the corrosion resistance, FRP bars can be used as a substitute for steel bars in concrete structures. Existing studies have shown that FRP-reinforced CAC beams have a satisfying flexural capacity and deformation capacity, which is comparable to steelreinforced CAC beams (Hu et al, 2017;Li et al, 2016;Wang et al, 2020b). In FRP bar reinforced concrete structures, the interfacial bond strength is of substantial importance to ensure the efficiency of the reinforcing bars.…”

Section: Frp Bar Reinforced Cacmentioning

confidence: 99%

Advances in coral aggregate concrete and its combination with FRP: A state-of-the-art review

Zhou

Feng

Yang

2020

Advances in Structural Engineering

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As an economical and eco-friendly construction material, coral aggregate concrete (CAC) plays an increasingly important role in emerging marine engineering applications. CAC fully utilizes local raw materials on remote islands. Due to the porous structure and low-strength characteristics of coral aggregates, CAC exhibits unique characteristics compared to ordinary concrete. This paper presents a state-of-the-art review of the properties of CAC, including (1) the physical properties of coral aggregates; (2) the mechanical properties of CAC under uniaxial and multiaxial compression; and (3) the durability of CAC especially its chloride ion resistance and performance under drying-wetting cycles. To overcome the challenges of steel corrosion in marine environments, fiber-reinforced polymer (FRP) has been indicated to be a promising material for applications in CAC construction. The latest studies on the combination of FRP and CAC are reviewed, including the use of FRP tubes and bars.

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“…Whilst, at ULS, the average crack widths were 4.19 mm and 1.63 mm for under-reinforced and over-reinforced beams, respectively. The experimental results observed that over-reinforced beams with a large number of cracks resulted in low values of crack width [ 17 , 32 , 37 , 38 , 40 , 47 ]. Over-reinforced beams were also recorded to have a slower rate in crack development speed [ 11 , 40 ].…”

Section: Aspect Behavior Of Flexural Strengthmentioning

confidence: 99%

Flexural Strength of Concrete Beam Reinforced with CFRP Bars: A Review

et al. 2022

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Conventional reinforced concrete (RC) structures are commonly associated with the corrosion of steel reinforcement. The application of carbon fiber reinforced polymer (CFRP) bars as flexural reinforcement has become a new promising option. This paper presents a state-of-the art flexural strength on concrete beams reinforced with CFRP bars. Concrete compressive and CFRP bar tensile strain, reinforcement ratio, types of surface treatment on CFRP bar and concrete compressive strength were identified as aspects of behavior. Significant findings in the literature had manifested all aspects of behavior that were affecting the flexural strength, deflections and crack characteristics of CFRP RC beams. In addition, the experimental result on 98 specimens of CFRP RC beams from the literature show that ACI 440.1R-15 and CSA S806-12 standards underestimate the ultimate flexural moment capacity of CFRP RC beams. On the other hand, Kara and Ashour predictions are more accurate with the experimental values. Moreover, hotspot research topics were also highlighted for further considerations in future studies.

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Comparative Study of Steel-FRP, FRP and Steel-Reinforced Coral Concrete Beams in Their Flexural Performance

Cited by 17 publications

References 33 publications

Short-Term Flexural Stiffness Prediction of CFRP Bars Reinforced Coral Concrete Beams

Short-Term Flexural Stiffness Prediction of CFRP Bars Reinforced Coral Concrete Beams

Advances in coral aggregate concrete and its combination with FRP: A state-of-the-art review

Flexural Strength of Concrete Beam Reinforced with CFRP Bars: A Review

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