Full-scale experimental evaluation of flexural strength and ductility of reinforced concrete beams strengthened with various FRP mechanisms

Hadi, Saheb; Kazeminezhad, Ehsan; Safakhah, Soroush

doi:10.1016/j.istruc.2022.07.011

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…According to the application distribution of these materials, the automobile sector accounts for 31% of utilization, followed by the construction industry with 26% (Friedrich & Almajid, 2012;Guha, 2021;Balla et al, 2023;C. Toduţ et al, 2023;Hadi et al, 2022;Tran et al, 2022). The maritime industry is responsible for 12%, while electronic applications and appliances are responsible for 10% and 8%, respectively (Neşer, 2017;Thomas, 2019).…”

Section: Applicationsmentioning

confidence: 99%

“…The accuracy of finite-element (FE) models in estimating ultimate load bearing capacity and deflection of RC beams reinforced with hybrid FRP laminates was validated, with percentage deviations ranging from 1% to 11% and 2% to 12%, respectively. Hadi et al, (2022) studied numerous FRP systems to find the best efficient way for retrofitting and strengthening RC beams. The study's findings led to the following conclusions.…”

Section: Cfrp Sheetsmentioning

confidence: 99%

“…This section presents an analysis of 124 RC beams that have been reinforced with FRP sheets to enhance their flexural performance (Ali et al, 2014;Ashour et al, 2004;Attari et al, 2012;Chen et al, 2018;Choobbor et al, 2019;Cosgun, 2016;Dong et al, 2013;Hadi et al, 2022;Hamid et al, 2009;Hosny et al, 2006;Jankowiak, 2012;Kim & Shin, 2011;Nawaz et al, 2022;Pham & Al-Mahaidi, 2004;Salama et al, 2019;Toutanji et al, 2006;Xie et al, 2014). Various types and ratios of FRP were employed in the strengthening process.…”

Section: Overviewmentioning

confidence: 99%

See 2 more Smart Citations

An Updated Review on the Effect of CFRP on Flexural Performance of Reinforced Concrete Beams

Jahami,

Issa

2024

Int J Concr Struct Mater

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This detailed review looks at how carbon fiber-reinforced polymer (CFRP) may be used to improve the flexural capacity of reinforced concrete (RC) beams. It investigates the history, characteristics, and research trends of FRP composites, assesses various flexural strengthening methods utilizing FRP, and addresses the predictive power of finite-element (FE) modeling. The assessment highlights the importance of enhanced design codes, failure mode mitigation, and improved predictive modeling methodologies. It emphasizes the advantages of improving FRP reinforcement levels to meet code expectations and covers issues, such as FRP laminate delamination and debonding. The findings highlight the need of balancing load capacity and structural ductility, as well as the importance of material behavior and failure processes in accurate prediction. Overall, this review offers valuable insights for future research and engineering practice to optimize flexural strengthening with CFRP in RC beams.

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Section: Applicationsmentioning

confidence: 99%

Section: Cfrp Sheetsmentioning

confidence: 99%

Section: Overviewmentioning

confidence: 99%

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An Updated Review on the Effect of CFRP on Flexural Performance of Reinforced Concrete Beams

Jahami,

Issa

2024

Int J Concr Struct Mater

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“…Depending on the beam type and loading, FRP sheets or laminates with or without anchors can be used to strengthen these elements against bending. Applying unidirectional FRPs on the tension side of the element is the most common method of flexural strengthening [70,74,75]. Panahi et al [66] evaluated the flexural retrofitting of RC beams with a combination of EB-FRP layers and near-surface mounted FRP rods.…”

Section: Beamsmentioning

confidence: 99%

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Abbaszadeh

Chaallal

2022

J. Compos. Sci.

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The primary seismic force-resisting system (SFRS) in middle- to high-rise reinforced concrete (RC) building structures often includes coupled shear walls (CSWs) and single shear walls (SSWs). These walls are designed to transfer lateral forces to the foundation and dissipate energy through the development of plastic hinges. The latter lead to residual displacement in these structural components. On the other hand, self-centering systems enable the structures to return to their initial position after severe loading or at least reduce residual displacement. The objectives of this study were, therefore, as follows: (i) to review the state of the art on shear wall self-centering techniques and retrofitting methods based on externally bonded fiber-reinforced polymer (EB-FRP); (ii) to evaluate research needs to improve the self-centering ability of shear walls using EB-FRP.

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“…This research investigated the strengthening of ribbed slabs using FRP composites. FRP composites have been effectively used for flexural strengthening of RC beams [1][2][3][4][5][6], RC beams with openings [7,8], and RC beam-column joints [9]. This is attributed to their advantages, such as speed and ease of application, resistance to corrosion, and minimal increases in the slab weight [10].…”

Section: Introductionmentioning

confidence: 99%

Performance of FRP-Upgraded RC One-Way Ribbed Slabs with an Opening in Flexure Zone

Al Kallas,

Elsanadedy,

Abbas

et al. 2023

Buildings

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Reinforced concrete (RC) one-way ribbed slabs serve as a prevalent flooring solution in the Middle East. In this region, the occurrence of openings within these slabs is frequent, particularly when making modifications to existing buildings. However, these openings compromise the stiffness and load-bearing capacity of the slabs, necessitating strengthening measures. All of the available investigations were carried out on strengthening RC one- and two-way solid slabs with openings. However, a noticeable research gap exists, as none of these studies have delved into the strengthening of RC one-way ribbed slabs with openings. This gap was bridged in this study by conducting a comprehensive experimental inquiry into the effectiveness of utilizing fiber-reinforced polymer (FRP) laminates to restore the flexural capacity of RC one-way ribbed slabs featuring flexure openings. The experimental program comprised four half-scale one-way ribbed slabs (having three ribs) divided into one unstrengthened specimen without openings to act as a reference, one unstrengthened specimen with a single opening located in the peak-moment region, and two FRP-strengthened slabs each having a single opening located in the peak-moment region. The dimensions of each slab were 2600 mm (length) × 825 mm (width) × 175 mm (thickness). The openings were square (side length = 400 mm), which included cutting the middle rib. The slabs were tested under four-point flexure until failure. It was revealed that strengthening slabs using FRP sheets fully restored the flexural capacity, which was even exceeded by up to 8%. However, the secant stiffness and dissipated energy were partially restored compared with the unstrengthened slab without opening, and these response parameters were reduced by up to 19% and 32%, respectively. Moreover, the displacement ductility for strengthened specimens was moderately reduced compared with the unstrengthened specimen without opening. Furthermore, an analytical procedure was suggested based on section analysis for quick and reasonable assessment of the peak load for both unstrengthened and strengthened one-way ribbed slabs with and without flexure openings.

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Full-scale experimental evaluation of flexural strength and ductility of reinforced concrete beams strengthened with various FRP mechanisms

Cited by 10 publications

References 21 publications

An Updated Review on the Effect of CFRP on Flexural Performance of Reinforced Concrete Beams

An Updated Review on the Effect of CFRP on Flexural Performance of Reinforced Concrete Beams

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Performance of FRP-Upgraded RC One-Way Ribbed Slabs with an Opening in Flexure Zone

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