Numerical and experimental investigation into the fatigue life of FRP bonded to concrete and anchored with bidirectional fabric patches

Al-Saoudi, Atheer; Kalfat, Robin; Al-Mahaidi, Riadh; Červenka, J; Pryl, Dobromil

doi:10.1016/j.engstruct.2021.112335

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…Both FRP laminates can be transported in rolls and are very lightweight. Compared to steel, FRP materials have some obvious advantages [8][9][10][11][12]: (1) Low density: the density of FRP materials is only about 1/8-1/4 of steel. As a result, FRP materials also significantly reduce the difficulty of construction and increase the length of continuously strengthened members; (2) High tensile strength: taking CFRP as an example, its tensile strength can reach 3-4 times that of steel, which further reflects the lightweight and high-strength characteristics of FRP materials; (3) Corrosion resistance: due to the fact that FRP materials are not corroded by acid, alkali, or chloride salts, they will not rust like steel.…”

Section: Frp Laminates In Structural Strengtheningmentioning

confidence: 99%

“…As a result, FRP materials also significantly reduce the difficulty of construction and increase the length of continuously strengthened members; (2) High tensile strength: taking CFRP as an example, its tensile strength can reach 3-4 times that of steel, which further reflects the lightweight and high-strength characteristics of FRP materials; (3) Corrosion resistance: due to the fact that FRP materials are not corroded by acid, alkali, or chloride salts, they will not rust like steel. A large amount of FRP materials are used in the reinforcement engineering of coastal bridges; (4) Fatigue resistance: except for the slightly inferior fatigue performance of fiberglass materials, other common FRP materials exhibit good fatigue resistance, among Compared to steel, FRP materials have some obvious advantages [8][9][10][11][12]: (1) Low density: the density of FRP materials is only about 1/8-1/4 of steel. As a result, FRP materials also significantly reduce the difficulty of construction and increase the length of continuously strengthened members; (2) High tensile strength: taking CFRP as an example, its tensile strength can reach 3-4 times that of steel, which further reflects the lightweight and high-strength characteristics of FRP materials; (3) Corrosion resistance: due to the fact that FRP materials are not corroded by acid, alkali, or chloride salts, they will not rust like steel.…”

Section: Frp Laminates In Structural Strengtheningmentioning

confidence: 99%

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Study on the Stress Threshold of Preventing Interfacial Fatigue Debonding in Concrete Beams Strengthened with Externally-Bonded FRP Laminates

Min,

Yang,

Song

et al. 2024

Buildings

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Externally-bonded FRP laminate is widely used in structural strengthening due to the many advantages of FRP materials. Further enhancement of the strengthening effect can be achieved by inducing prestress into the FRP laminate. However, FRP debonding is still a main issue of this strengthening method, especially the Intermediate Crack-induced debonding (IC debonding). To better understand the impact of FRP debonding on the strengthening effect, a series of parameter analyses were conducted in this study based on the fatigue life prediction model proposed by the authors. The proposed model involves the fatigue damage accumulation of components of the beam, the mutual interaction between each component, and the impact of FRP fatigue debonding. As a result, a stress threshold for preventing FRP fatigue debonding in strengthening the concrete beam was proposed, which aimed to avoid safety hazards caused by IC debonding in practical engineering.

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Section: Frp Laminates In Structural Strengtheningmentioning

confidence: 99%

Section: Frp Laminates In Structural Strengtheningmentioning

confidence: 99%

Study on the Stress Threshold of Preventing Interfacial Fatigue Debonding in Concrete Beams Strengthened with Externally-Bonded FRP Laminates

Min,

Yang,

Song

et al. 2024

Buildings

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“…To allow for the bond between the epoxy and concrete substrate to be considered, the surface contact between the two materials needs to be explicitly modelled. There are three modelling strategies: (i) Perfect bond [23,25,26]. In this case, bond failure is assumed to occur on concrete substrate beneath the epoxy resin.…”

Section: Frp Modellingmentioning

confidence: 99%

Modelling of Shear-critical, Lightly Reinforced Concrete T-beams with Externally Bonded CFRP using ATENA Science

Njoko,

Tambusay,

Jamieson

et al. 2023

ced

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This paper presents the finite element modelling of shear-critical reinforced concrete beams strengthened with U-wrapped CFRP fabrics using ATENA. Fracture-plastic constitutive models, implemented in the context of smeared crack and crush-band approach, were employed to represent the nonlinear behaviours of concrete. CFRP U-wraps were modelled as smeared reinforcement and bonded to the concrete surface using an interface element, considering appropriate bond properties. To this end, two large lightly reinforced concrete T-beams from tests undertaken by Brindley in 2018 were analysed and predictions of the load-deflection response and failure mode are presented to demonstrate the accuracy of the modelling. Moreover, parametric analyses were performed to assess the effectiveness of CFRP U-wraps for strengthening deteriorated members. It is shown that the response of the beams can be predicted accurately, capturing successfully the brittle shear failure mode observed experimentally. It is also shown that CFRP U-wraps are useful for reducing the brittleness of shear-critical beams.

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“…On the other hand, the preparation and installation of these anchors greatly increase the difficulty of implementation and the demand for craftsmanship [28,29]. To increase interfacial shear resistance, several indirect anchorage techniques have been created [30,31].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of RC Beams Strengthened with GFRP Laminate and Retrofitting with Novelty of Adhesive Material

Rageh¹,

El-Mandouh

Elmasry³

et al. 2022

Buildings

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Two unique approaches were proposed to strengthen the bond between the glass fiber reinforcement polymer (GFRP) and the RC concrete surfaces. The two bonding materials are epoxy (EP) and geopolymer (GPP) with different ratios of short glass fibers (SGF). The experimental program includes seven reinforced concrete (RC) beams that have the same cross-section (150 mm × 200 mm) and are 1500 mm in length. The first beam is the control beam (B0-Control). The next three beams B1-0-GPP, B2-0.6-GPP, and B3-1.2-GPP have GPP with SGF ratios of 0%, 0.6%, and 1.2%, respectively. The last three beams B4-0-EP, B5-0.6-EP, and B6-1.2-EP have EP with SGF ratios of 0%, 0.6%, and 1.2%, respectively. The results show that the failure loads of beams B1-0-GPP, B2-0.60-GPP, and B3-1.2-GPP are greater than the control beam B0-Control by approximately 20.80%, 25.60%, and 31.40%, respectively, whereas the failure loads of beams B4-0-EP, B5-0.6-EP, and B6-1.2-EP are greater than the B0-Control by approximately 16.90%, 26.90%, and 26.10%, respectively; it is also noted that debonding occurs. In addition to the adhesive material, GPP has a great effect on increasing the beam’s failure load capacity due to the enhanced interfacial bond shear strength. Additionally, a finite-element program ABAQUS is performed to verify the experimental results.

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Numerical and experimental investigation into the fatigue life of FRP bonded to concrete and anchored with bidirectional fabric patches

Cited by 8 publications

References 19 publications

Study on the Stress Threshold of Preventing Interfacial Fatigue Debonding in Concrete Beams Strengthened with Externally-Bonded FRP Laminates

Study on the Stress Threshold of Preventing Interfacial Fatigue Debonding in Concrete Beams Strengthened with Externally-Bonded FRP Laminates

Modelling of Shear-critical, Lightly Reinforced Concrete T-beams with Externally Bonded CFRP using ATENA Science

Flexural Behavior of RC Beams Strengthened with GFRP Laminate and Retrofitting with Novelty of Adhesive Material

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