The Influence of CFRP Orientation Angle on the Shear Strength of RC Beams

Murad, Yasmin

doi:10.2174/1874836801812010269

Cited by 11 publications

(3 citation statements)

References 20 publications

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“…Additionally, the TR55 design model displayed a significant underestimation of the total shear force capacity for the tested beams. Murad [ 124 ] evaluated different orientations of FRP used for the fortification of beams through EBR. Through experimentation, it was found that the 63° inclined CFRP had a remarkable impact on increasing the shear strength and ultimate deflection of the specimen.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

A State-of-the-Art Review on Structural Strengthening Techniques with FRPs: Effectiveness, Shortcomings, and Future Research Directions

Hammad,

Bahrami,

Khokhar

et al. 2024

Materials

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In the pursuit of creating more sustainable and resilient structures, the exploration of construction materials and strengthening methodologies is imperative. Traditional methods of relying on steel for strengthening proved to be uneconomical and unsustainable, prompting the investigation of innovative composites. Fiber-reinforced polymers (FRPs), known for their lightweight and high-strength properties, gained prominence among structural engineers in the 1980s. This period saw the development of novel approaches, such as near-surface mounted and externally bonded reinforcement, for strengthening of concrete structures using FRPs. In recent decades, additional methods, including surface curvilinearization and external prestressing, have been discovered, demonstrating significant additional benefits. While these techniques have shown the enhanced performance, their full potential remains untapped. This article presents a comprehensive review of current approaches employed in the fortification of reinforced cement concrete structures using FRPs. It concludes by identifying key areas that warrant in-depth research to establish a sustainable methodology for structural strengthening, positioning FRPs as an effective replacement for conventional retrofitting materials. This review aims to contribute to the ongoing discourse on modern structural strengthening strategies, highlight the properties of FRPs, and propose avenues for future research in this dynamic field.

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Section: Mechanical Propertiesmentioning

confidence: 99%

A State-of-the-Art Review on Structural Strengthening Techniques with FRPs: Effectiveness, Shortcomings, and Future Research Directions

Hammad,

Bahrami,

Khokhar

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…Also, it has a unique property to deal with different sectional shapes and corners for strengthening applications and shear retrofitting. Numerous structures need to be strengthened due to the fundamental increase in the applied loads, cruel environment, and poor maintenance [3]. Using CFRP to strengthening the shear in beams has been attracted tremendous attention lately.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis for the Behavior of Reinforced Concrete T-Section Deep Beams Strengthened with CFRP Sheets

Ali

Hashim

2020

KEM

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This paper presents a numerical investigation for the behavior of simply supported T-section deep beams, which strengthened with Carbon Fiber Reinforced Polymer (CFRP) sheets. The used specimens were (1.8 m length), (450 mm width and 100 mm depth) flange dimensions, and (180 mm width and 360 mm depth) web dimensions. The specimens were divided into four groups. Mainly, the difference between specimens in each group is in the main reinforcement details. The control group consisted of six beams unstrengthen with CFRP, the other groups were similar to the control group but externally strengthened with CFRP sheets, which were (0.131 mm) thickness. In detail, the second group was strengthened with CFRP sheet at the bottom surface of the web. The third group was strengthened horizontally with CFRP sheets at both sides of the specimen's web. The last group was strengthened with three sheets of CFRP; one at the bottom face of the web and the others at the web sides. The results show that using CFRP at the bottom slightly increased the ultimate strength and changed the failure mode from flexural to shear. Using CFRP at the sides significantly increased both flexural and shear strength, while using CFRP at the sides and bottom of the web did not significantly enhanced the ultimate strength in comparison with using CFRP at the sides only.

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“…They have found that the bond capacity is controlled by the diameter, length, and the angle of inclination of the anchors. Murad (2018aMurad ( , 2018b has found that CFRP sheets' orientation angle has significant effect on the peak load and deflection of reinforced concrete members. Ozbakkaloglu, Fang, and Gholampour (2017) have studied the effect of fiber-reinforced polymer (FRP) anchor configuration on the behavior of FRP plates externally bonded on concrete members.…”

Section: Introductionmentioning

confidence: 99%

Predictive Model to the Bond Strength of FRP-to-Concrete Under Direct Pullout Using Gene Expression Programming

Murad

Ashteyat

Hunaifat

2019

Journal of Civil Engineering and Management

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Gene expression programming (GEP) is used in this research to develop an empirical model that predicts the bond strength between the concrete surface and carbon fiber reinforced polymer (CFRP) sheets under direct pull out. Therefore, a large and reliable database containing 770 test specimens is collected from the literature. The gene expression programming model is developed using eight parameters that predominantly control the bond strength. These parameters are concrete compressive strength, maximum aggregate size, fiber reinforced polymer (FRP) tensile strength, FRP thickness, FRP modulus of elasticity, adhesive tensile strength, FRP length, and FRP width. The model is validated using the experimental results and a statistical assessment is implemented to evaluate the performance of the proposed GEP model. Furthermore, the predicted bond results, obtained using the GEP model, are compared to the results obtained from several analytical models available in the literature and a parametric study is conducted to further ensure the consistency of the model by checking the trends between the input parameters and the predicted bond strength. The proposed model can reasonably predict the bond strength that is most fitting to the experimental database compared to the analytical models and the trends of the GEP model are in agreement with the overall trends of the analytical models and experimental tests.

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The Influence of CFRP Orientation Angle on the Shear Strength of RC Beams

Cited by 11 publications

References 20 publications

A State-of-the-Art Review on Structural Strengthening Techniques with FRPs: Effectiveness, Shortcomings, and Future Research Directions

A State-of-the-Art Review on Structural Strengthening Techniques with FRPs: Effectiveness, Shortcomings, and Future Research Directions

Finite Element Analysis for the Behavior of Reinforced Concrete T-Section Deep Beams Strengthened with CFRP Sheets

Predictive Model to the Bond Strength of FRP-to-Concrete Under Direct Pullout Using Gene Expression Programming

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