Repair and strengthening of concrete beam materials using different CFRP laminates configuration

Obaid, Wildan A.; AL-Asadi, Ali K.; Shaia, Hussain

doi:10.1016/j.matpr.2021.09.532

Cited by 7 publications

(6 citation statements)

References 5 publications

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“…Other than that, CFRP composites can increase the performance of structural concrete members in terms of ductility, performance under cyclic and fatigue loading and environmental durability (Li et al, 2006;Scheffers & Ravindrarajah, 2009). In addition, CFRP sheets also become favourable to be applied in strengthening and repairing RC structures because they are lightweight, easy to manage, handle and install, and have good resistance and abrasion to corrosion and chemical attack (Obaid et al, 2021). CFRP can be prefabricated at the factory, which may reduce the installation time required on site.…”

Section: Concrete Wrapping In Rc Structural Strengtheningmentioning

confidence: 99%

“…Previously, many studies had been conducted to investigate and evaluate the performance of shear, compressive, and flexural strengths of RC structures such as beams, columns and slabs with the application of CFRP sheets by using the wrapping technique on the structures (Täljsten, 2003;Ye et al, 2002;Obaid et al, 2021). However, the research on the behaviour and performance of concrete structures under the bearing load condition is still lacking.…”

Section: Journal Of Sustainable Civil Engineering and Technologymentioning

confidence: 99%

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Numerical Modelling of Bearing Strength of Concrete Strengthening with Carbon Fibre Reinforced Polymers (CFRP) Wrapping for Different Thickness of CFRP Sheet

Kamaruzaman,

Yahya

2024

JSCET

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The bearing strength of concrete plays an important role in transmitting the bearing force into the structural supports, especially for buildings and infrastructure such as concrete footings, concrete bridges, column corbels and concrete connections. The structural behaviour of the concrete bearing is related to the confinement effect, in which the load is transmitted to the concrete surface through the contact interaction between the steel bearing plate. However, extreme penetration on the contact surface of the concrete blocks by the steel bearing plate leads to failure modes on the concrete block. This research study focuses on the performance of the bearing strength of the concrete when it is wrapped with carbon fiber-reinforced polymers (CFRP) as the strengthening method. This research also examines the bearing strength of concrete when it is wrapped with a single layer of different thicknesses of CFRP sheet, which range from 1mm to 4mm thick. In order to understand the concrete bearing performance, a finite element model (FEM) using ABAQUS/CAE software is developed. An optimum meshing with a size 12.5mm is used for the further nonlinear analysis of the concrete model to discuss the results, such as the model validation by comparing the bearing strength results from the FE model with the Australian Standard, the comparison of the load-displacement curve for different thicknesses of CFRP wrapping, as well as the structural response or visualization of the concrete model. From the results, it shows that the different thicknesses of the CFRP wrapping significantly have a positive impact on the bearing capacity of the concrete, where the bearing strength of the concrete increases up to 26.16% as the thickness of the CFRP wrapping increases to 4mm for the optimum meshing size of 12.5mm. The FE visualization also shows various structural responses of the concrete bearing in the context of the deformation shape, vertical displacement, vertical stress distribution and max and minimum principal stress distribution of the concrete bearing, which are further discussed in this report

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Section: Concrete Wrapping In Rc Structural Strengtheningmentioning

confidence: 99%

Section: Journal Of Sustainable Civil Engineering and Technologymentioning

confidence: 99%

Numerical Modelling of Bearing Strength of Concrete Strengthening with Carbon Fibre Reinforced Polymers (CFRP) Wrapping for Different Thickness of CFRP Sheet

Kamaruzaman,

Yahya

2024

JSCET

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“…Wildan.A.Obaid,Ali.K.AL-asadi,Hussain.Shaia [21] studied the use of various CFRP laminate configurations for concrete beam strengthening and repair. As shown in figure 8, the preloaded beams were repaired using two distinct procedures employing CFRP sheet (U-warp and W-warp).…”

Section: Figurementioning

confidence: 99%

Repairing and strengthening techniques of RC beams: a review

Hassan,

Latief

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The purpose of this review is to present the techniques for strengthening or repairing of reinforced concrete-beams (RC). The concrete members, like RC beam are might be required to be strengthened to increase the internal strength capacity to resist additional external loads or repaired to increase the design’s structural rigidity and insulate the reinforcement from aggressive conditions. The experimental studies that related to the techniques of repairing and strengthening of RC beams using: external steel plates, fiber reinforced concrete (FRC), reinforced concrete (RC) jacketing, sprayed fiber reinforced polymer FRP, epoxy injection, mortar jackets, near-surface carbon fiber (SNSM-CFRP) strips, near-surface glass fiber (NSM-GFRP) rods, CFRP laminate and sheet; and adding an ultra high performance concrete (UHPC) layer. All the techniques that were discussed showed that there is an improvement in the general behavior of the beams that have been strengthened and repaired, as well as an increase in the maximum load and ductility.

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“…Despite these prominent characteristics, the majority of concrete structures may become damaged when subjected to the addition of structures, overloading, accidental loads, errors in design or during the erection process, environmental conditions, etc. Consequently, these weak concrete members require repair and/or strengthening to increase or restore increase or restore their internal load capacity to resist additional external loads [2,3]. After the repair or strengthening work is successfully completed, the structural member's safety, serviceability, and durability performance can be enhanced.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on Flexural Behavior of Concrete Beams Using Notches and Repair Materials

Khan,

Akhtar,

Rawat

et al. 2024

Sustainability

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In a concrete beam, cracking is generated on the tension side under the effect of flexure, shear, and torsional loadings. Accordingly, these weak concrete members require repair and/or strengthening to increase or restore their internal load capacity. In the current experimental and numerical investigations on concrete beams, the impact of using notches with different width to depth ratios on the ultimate flexural load under a three-point test was considered. Further, the flexural behavior performance of a notched concrete beam repaired using the three repair materials—cement mortar, bacterial mortar, and adhesive—was also examined. Consequently, a comparative study was implemented between the experimental and numerical results. A concrete damage plasticity (CDP) model was used for the finite element numerical analysis of the beams. The differences in numerical and experimental measured results ranged from 0.65 to 22.20% for the ultimate load carrying capacity. As the notch size increased, the ultimate load carrying capacity of the beam reduced. Additionally, a linear regression model was used to predict the ultimate load values at a notch width interval of 5 mm up to a maximum notch width of 100 mm. It was observed that the ultimate load capacity for a repaired beam increased as compared to the notched beam for all three repair materials under consideration. And the maximum ultimate load increased in the case of notched beams repaired using adhesive. Furthermore, in comparison to the cement mortar, the performance of the bacterial mortar in terms of the ultimate load was more. The bacterial mortar was found to be more sustainable and more durable as a repair material for concrete structures.

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Repair and strengthening of concrete beam materials using different CFRP laminates configuration

Cited by 7 publications

References 5 publications

Numerical Modelling of Bearing Strength of Concrete Strengthening with Carbon Fibre Reinforced Polymers (CFRP) Wrapping for Different Thickness of CFRP Sheet

Numerical Modelling of Bearing Strength of Concrete Strengthening with Carbon Fibre Reinforced Polymers (CFRP) Wrapping for Different Thickness of CFRP Sheet

Repairing and strengthening techniques of RC beams: a review

Experimental and Numerical Study on Flexural Behavior of Concrete Beams Using Notches and Repair Materials

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