Modelling the bond in GFRP bar reinforced concrete thin structural members

Veljkovic, Ana; Carvelli, Valter; Rezazadeh, Mohammadali

doi:10.1016/j.istruc.2019.12.027

Cited by 9 publications

(3 citation statements)

References 42 publications

(61 reference statements)

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“…As the temperature increases, the background substance becomes mild little by little, and the strength between the resistance fibers and the background substance diminishes. In addition, because of the FRP bars' low elasticity modules, their hardness reduces 41‐45 . As a result, manipulating the control of the permitted places of the armed concrete constructions into FRP bars should be highly considered 46 .…”

Section: Theoretical Basis Of Gfrp Barmentioning

confidence: 99%

Bond strength prediction of the composite rebars in concrete using innovative bio‐inspired models

Alizadeh

Naderpour

Mirrashid

2020

Engineering Reports

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The bond strength among the concrete and reinforced bars is one of the most important factors in designing the reinforced concrete structures. One of the serious problems encountered by utilization of steel-reinforcement bars is corrosion when exposed to different environments. Glass fiber-reinforced polymers (GFRPs) are known as a solution to prevent the destruction of the civil infrastructure. The present study attempts to predict the bond strength between the GFRP bars and concrete based on the neuro-fuzzy inference system and artificial neural networks using 159 beam specimens including notched, splice, hinged, and inverted hinged. The neuro-fuzzy inference system consists of five input series. The output, which is the bond strength, is compared with those presented in the various code relations such as ACI 440.1R-15 and CSA S806-12. It was concluded that the outputs are more compatible with the experimental results in comparison with the amounts obtained from the codes equations.

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Section: Theoretical Basis Of Gfrp Barmentioning

confidence: 99%

Bond strength prediction of the composite rebars in concrete using innovative bio‐inspired models

Alizadeh

Naderpour

Mirrashid

2020

Engineering Reports

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“…Although the bond behaviour has been the focus of several recent experimental and analytical studies (e.g., Refs. [57][58][59][60][61]), the topic still remains open; detailed finite element simulation of the mechanics at the mortar-fibre interface results in computationally intensive models. Furthermore, identifying micro-mechanical interface parameters necessitates involved experimental procedures, often resulting in significant variance.…”

Section: Introductionmentioning

confidence: 99%

Empirical Equations for Modelling Yarn–Mortar Debonding in TRM-Strengthened Masonry Walls Subjected to Out-of-Plane Loading

Kouris,

Triantafyllou,

Bournas

et al. 2023

Buildings

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The effectiveness of textile-reinforced mortar (TRM) strengthening of masonry walls largely depends on the bond between the constituent materials. Finite element analysis (FEA) can provide valuable insights on the effect of the parameters affecting the bond; however, detailed FEA is computationally intensive. To alleviate this, we develop novel empirical equations to estimate effective textile fibre properties, thus implicitly accounting for yarn and mortar debonding. As a result, 3D finite element simulations of strengthened wall specimens are simplified and accelerated. The proposed scheme is calibrated using load–displacement paths derived from experimental data, and the simulated failure modes are compared against the experimental ones demonstrating perfect agreement. A parametric analysis is conducted, exploring the impact of the mechanical ratio of TRM reinforcement and the axial wall load on the effectiveness of TRM strengthening. We demonstrate that low values of mechanical reinforcement, corresponding to natural fibres, give rise to an 8-fold increase in the capacity of unreinforced walls. The findings draw conclusions about the efficacy of TRM strengthening in masonry structures, and provide valuable insights for optimising TRM reinforcement, considering different fibre materials and axial loads in masonry structures.

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“…This latter approach traditionally implies the development of a specific finite element, the use of cohesive elements, and/or the assumption of damage models, among other strategies. Associated complex simulations and large computational costs can be, however, considered as negative factors [23].…”

Section: Introductionmentioning

confidence: 99%

Influence of Bond Characterization on Load-Mean Strain and Tension Stiffening Behavior of Concrete Elements Reinforced with Embedded FRP Reinforcement

et al. 2022

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Based on the characterization of the bond between Fiber-Reinforced Polymer (FRP) bars and concrete, the structural behavior of cracked Glass-FRP (GFRP)-Reinforced Concrete (RC) tensile elements is studied in this paper. Simulations in which different bond-slip laws between both materials (FRP reinforcement and concrete) were used to analyze the effect of GFRP bar bond performance on the load transfer process and how it affects the load-mean strain curve, the distribution of reinforcement strain, the distribution of slip between reinforcement and concrete, and the tension stiffening effect. Additionally, a parametric study on the effect of materials (concrete grade, modulus of elasticity of the reinforcing bar, surface configuration, and reinforcement ratio) on the load-mean strain curve and the tension stiffening effect was also performed. Results from a previous experimental program, in combination with additional results obtained from Finite Element Analysis (FEA), were used to demonstrate the accuracy of the model to correctly predict the global (load-mean strain curve) and local (distribution of strains between cracks) structural behavior of the GFRP RC tensile elements.

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Modelling the bond in GFRP bar reinforced concrete thin structural members

Cited by 9 publications

References 42 publications

Bond strength prediction of the composite rebars in concrete using innovative bio‐inspired models

Bond strength prediction of the composite rebars in concrete using innovative bio‐inspired models

Empirical Equations for Modelling Yarn–Mortar Debonding in TRM-Strengthened Masonry Walls Subjected to Out-of-Plane Loading

Influence of Bond Characterization on Load-Mean Strain and Tension Stiffening Behavior of Concrete Elements Reinforced with Embedded FRP Reinforcement

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