Seismic flexural behavior of CFRP strengthened reinforced concrete beams secured with fiber anchors

Alshamrani, Salman; Rasheed, Hayder A.; Salahat, Fahed H.; Borwankar, Aniket; Divilbiss, Nicholas

doi:10.1016/j.engstruct.2024.117728

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…The utilization of carbon-fiber-reinforced polymer (CFRP) in reinforcing concrete is increasingly favored for constructing resilient structures [1][2][3][4][5]. The process of CFRP reinforcement involves the application of a layer of carbon matting bound with epoxy resin onto the cement base.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Carbon Fiber Reinforced Polymer Concrete Reinforcement Ageing Using Microwave Infrared Thermography Method

Szymanik,

Keo,

Brachelet

et al. 2024

Applied Sciences

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This study presents the utilization of the microwave infrared thermography (MIRT) technique to identify and analyze the defects in the carbon-fiber-reinforced polymer (CFRP) composite reinforcement of concrete specimens. At first, a set of numerical models was created, comprising the broadband pyramidal horn antenna and the analyzed specimen. The utilization of the system operating at a power of 1000 W in a continuous mode, operating at frequency of 2.45 GHz, was analyzed. The specimen under examination comprised a compact concrete slab that was covered with an adhesive layer and, thereafter, topped with a layer of CFRP. An air gap represented a defect at the interface between the concrete and the CFRP within the adhesive layer. In the modeling stage, the study investigated three separate scenarios—a sample with no defects, a sample with a defect located at the center, and a sample with a numerous additional random defects located at the rim of the CFRP matte—to analyze the effect of the natural reinforcement degradation in this area. The next phase of the study involved conducting experiments to confirm the results obtained from numerical modeling. In the experiments, the concrete sample aged for 10 years with the defect in the center and naturally developed defects at the CFRP rim was used. The study employed numerical modeling to explore the phenomenon of microwave heating in complex structures. The aim was to assess the chosen antenna design and identify the most effective experimental setup. These conclusions were subsequently confirmed through experimentation. The observations made during the heating process were particularly remarkable since they deviated from earlier studies that solely conducted measurements of the sample post-heating phase. The findings demonstrate that MIRT has the capacity to be employed as a technique for detecting flaws in concrete structures reinforced with CFRP.

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Section: Introductionmentioning

confidence: 99%

Investigation of Carbon Fiber Reinforced Polymer Concrete Reinforcement Ageing Using Microwave Infrared Thermography Method

Szymanik,

Keo,

Brachelet

et al. 2024

Applied Sciences

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“…The application of CFRP has become a recognized method for strengthening or rehabilitating existing reinforced concrete elements (RCEs). Many studies have reported the excellent efficacy of CFRP in enhancing the flexural performance of RC beams under monotonic loading [29,43,44]. The main elements of the CFRP-concrete bonded system used for external reinforcement of RC structures include CFRP dry fiber sheets, adhesive, and anchors when necessary [45].…”

Section: Introductionmentioning

confidence: 99%

Carbon Fiber-Reinforced Polymer Composites Integrated Beam–Column Joints with Improved Strength Performance against Seismic Events: Numerical Model Simulation

Aljabbri,

Karim,

Majeed

2024

Eng

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Strength enhancement of non-seismic concrete beam–column joints (NSCBCJs) via carbon fiber-reinforced polymer composites (CFRPCs) integration has become a viable strategy. However, the implementation of these NSCBCJs without transverse reinforcement shows poor performance during earthquakes in seismic locations. Thus, strengthening the anti-seismic performance of NSCBCJs to meet the acceptance criteria of ACI 374.1-05 is fundamentally significant. Yet, in addition to limited experimental results, only a few numerical studies based on the finite element model have been performed to determine the anti-seismic behavior of NSCBCJs. Consequently, the stress contribution of CFRPCs to NSCBCJs is not clearly understood. Therefore, we used a finite element model to examine the strength contribution of CFRPCs to NSCBCJs. The performance of the proposed finite element model was validated using the experimental results, demonstrating a good agreement between them. It was shown that the strength of NSCBCJs was improved due to CFRPC incorporation, thereby achieving compliance with the seismic requirements of ACI 374.1-05. In addition, CFRPCs presence could enhance the confinement, reduce the deformation of the NSCBCJs and, thus, decrease their stiffness and strength degradation, while simultaneously improving the energy dissipation.

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Effects of U-wrap anchored doubly FRP strengthened reinforced concrete beams on ductility and serviceability improvements

Al Shboul,

Salahat,

Rasheed

2024

Engineering Structures

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Seismic flexural behavior of CFRP strengthened reinforced concrete beams secured with fiber anchors

Cited by 6 publications

References 18 publications

Investigation of Carbon Fiber Reinforced Polymer Concrete Reinforcement Ageing Using Microwave Infrared Thermography Method

Investigation of Carbon Fiber Reinforced Polymer Concrete Reinforcement Ageing Using Microwave Infrared Thermography Method

Carbon Fiber-Reinforced Polymer Composites Integrated Beam–Column Joints with Improved Strength Performance against Seismic Events: Numerical Model Simulation

Effects of U-wrap anchored doubly FRP strengthened reinforced concrete beams on ductility and serviceability improvements

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