Strengthening pre-damaged RC square columns with fabric-reinforced cementitious matrix (FRCM): Experimental investigation

Alhoubi, Yazan; Refai, Ahmed El; Abed, Farid; El‐Maaddawy, Tamer; Tello, Noor

doi:10.1016/j.compstruct.2022.115784

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…The columns strengthened with two layers experienced internal delamination, while those with four layers suffered fabric rupture. [67]. Fig.…”

Section: Strengthening Of Rc Column Using Frcmmentioning

confidence: 99%

“…Nonetheless, this treatment renders the textiles less pliable, making their use on intricate shapes like U-shaped or fully wrapped structures challenging, much like steel fabrics [27]. The formulation of the mortar employed as the matrix within FRCM (Fabric Reinforced Cementitious Matrix)/ TRM (Textile-Reinforced Mortar) systems significantly influences its composite behavior [28]. Impregnating fibers with mortar holds paramount importance for establishing a robust bond between the fibers and the matrix [8].…”

Section: Introductionmentioning

confidence: 99%

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A state of art of review on strengthening of concrete structures using fabric reinforced cementitious matrix

Sagare,

2024

Res. Eng. Struct. Mat.

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Renovation, refurbishment, restoration, and retrofitting of existing structures have grown more challenging issues for the construction profession. Construction buildings are susceptible to damage at the time of the earthquake and need strengthening to enhance their strength, stiffness, and ductility. Fabric-reinforced cementitious matrix (FRCM) techniques have been recently introduced to the construction sector as a feasible solution for fiber-reinforced polymers (FRP) in strengthening application. FRCM composed of high strength fabric grids with cement-based material serve as a binder for FRCM matrices. The binder employed for FRCM composed of cement-based mortar along with polymers are added to improve the bond strength properties. The cementitious matrix utilized in FRCM has superior thermal resistance and better compatibility with the concrete surface. The utilization of FRCM matrix for upgrading and restoring the concrete members is gaining more prominence as a replacement to FRP. This work conducts a thorough analysis of the application of FRCM techniques to concrete structural members like beams, columns, slabs, and beam-column joints. This paper primarily aims to present the FRCM process on structural members and to discuss the flexural, shear, and load carrying FRCM materials that are used in the field.

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“…The columns strengthened with two layers experienced internal delamination, while those with four layers suffered fabric rupture. [67]. Fig.…”

Section: Strengthening Of Rc Column Using Frcmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A state of art of review on strengthening of concrete structures using fabric reinforced cementitious matrix

Sagare,

2024

Res. Eng. Struct. Mat.

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“…The number of textile layers has a greater influence on peak load, ductility, and energy dissipation, and a lesser influence on yield load and stiffness degradation. The recent advances explored the possibilities of TRC precast segments, and different strengthening configurations (Dinh et al 2020), TRC strengthening of pre-damaged columns (Alhoubi et al 2022), and also strengthened TRC columns exposed to high temperatures (Park et al 2021). Based on the existing literature, the research on TRC reveals a gap in the development of an appropriate binder and suitable strengthening schemes.…”

Section: Introductionmentioning

confidence: 99%

RC-Columns Subjected to Lateral Cyclic Force with Different FRCM-Strengthening Schemes: Experimental and Numerical Investigation

John,

Cascardi,

Verre

et al. 2023

Preprint

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The vulnerability of reinforced concrete (RC) structures against seismic events has prompted extensive research into retrofitting techniques aimed at enhancing their seismic performance. Among these, Fabric-Reinforced Cementitious Matrix (FRCM) systems have gained prominence as promising solutions for strengthening RC-columns. This study presents a comprehensive investigation into the seismic strengthening of RC columns using FRCM, combining experimental and numerical approaches to assess their effectiveness. The experimental phase of this research involved the fabrication of scaled RC-column specimens representing typical real-world conditions. These columns were subjected to a series of cyclic loading tests to simulate seismic forces. Multiple FRCM configurations, including different fiber types and dosages, were applied to these specimens. The experimental results revealed a substantial increase in the ductility, stiffness, and ultimate strength of the strengthened RC-columns, indicating the potential of FRCM systems as effective seismic retrofit solutions. In parallel, a numerical analysis was conducted using finite element modeling (FEM) to simulate the behavior of the strengthened RC-columns under seismic loading conditions. The FEM simulations were validated against the experimental data, demonstrating good agreement. This numerical investigation allowed for a more in-depth understanding of the stress distribution and deformation patterns within the strengthened columns, aiding in the optimization of FRCM reinforcement strategies. The integrated experimental and numerical investigation presented in this study contributes valuable insights into the seismic strengthening of RC-columns using FRCM systems. It provides a holistic understanding of their performance, including their enhanced load-carrying capacity, as well as improved ductility guiding the adoption of FRCM systems as a viable solution for mitigating seismic risk in existing RC-structures.

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“…To overcome the drawbacks linked to the organic matrices used for FRPs, the fabricreinforced cementitious matrix (FRCM) strengthening systems, also known as textilereinforced mortars (TRMs), were introduced. In these systems, open mesh textile fibers are embedded into inorganic mortar-based matrices, which are used as an alternative to the FRP organic matrices [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Concrete Cylinders Confined with PBO FRCM Exposed to Elevated Temperatures

Talo,

Abed,

El Refai

et al. 2023

Fire

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Externally bonded fiber-reinforced polymers (FRPs) have been widely used for strengthening and retrofitting applications. However, their efficacy is hindered by the poor resistance of their epoxy resins to elevated temperatures and their limited compatibility with concrete substrates. To address these limitations, fabric-reinforced cementitious matrix (FRCM), also known as textile reinforced mortar (TRM), systems have emerged as an alternative solution. In this study, experimental tests were performed on concrete cylinders confined with FRCM systems that consisted of mineral mortar and poliparafenilenbenzobisoxazole fabric (PBO). The cylinders with concrete strengths of 30, 45, and 70 MPa, were confined with one or two FRCM layers, and were subjected to different target temperatures (100, 400, and 800 °C). The experimental results highlighted the confinement effect of FRCMs on the compressive strength of the tested cylinders. Cylinders exposed to 100 °C exhibited a slight increase in their compressive strength, while no specific trend was observed in the compressive strength of cylinders heated to 400 °C. Specimens heated up to 800 °C experienced a significant reduction in strength, reaching up to 82%.

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Strengthening pre-damaged RC square columns with fabric-reinforced cementitious matrix (FRCM): Experimental investigation

Cited by 8 publications

References 17 publications

A state of art of review on strengthening of concrete structures using fabric reinforced cementitious matrix

A state of art of review on strengthening of concrete structures using fabric reinforced cementitious matrix

RC-Columns Subjected to Lateral Cyclic Force with Different FRCM-Strengthening Schemes: Experimental and Numerical Investigation

Experimental Investigation of Concrete Cylinders Confined with PBO FRCM Exposed to Elevated Temperatures

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