Strengthening Square and Circular Low-Strength Concrete Columns with Fiber-Reinforced Cementitious Matrix: Experimental Investigation

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

doi:10.1061/(asce)sc.1943-5576.0000676

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…It was noticed from the conducted literature that none of the previous research addressed the topic of repairing damaged columns, with the exception of the paper by Toska et al 5 The present study constitutes a part of a large experimental program, 9,10 of which the main aim is investigating the behavior of short RC columns strengthened with different systems of FRCM. In this experimental stage, the behavior of circular pre-damaged short RC columns strengthened with PBO-FRCM was investigated.…”

Section: Introductionmentioning

confidence: 97%

Experimental investigation of pre‐damaged circular RC columns strengthened with fabric‐reinforced cementitious matrix (FRCM)

Tello

Abed

Refai

et al. 2022

Structural Concrete

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This paper aims at investigating the efficiency of strengthening pre-damaged circular reinforced concrete (RC) columns with Polyparaphenylene Benzobisoxazole fabric-reinforced cementitious matrix (PBO-FRCM). The investigated parameters were the degree of pre-damage (non-damaged, damaged monotonically up to yielding, or fatigue damaged), the number of PBO-FRCM layers (0, 2, or 4), and the tie spacing (180 or 90 mm). The experimental results of testing 12 short columns under axial compression showed that PBO-FRCM systems enhanced the capacity of the non-damaged columns and successfully restored and further enhanced the capacity of the pre-damaged columns.Columns strengthened with two and four PBO-FRCM layers showed a gain in the capacity of up to 40% and 75%, respectively. Furthermore, PBO-FRCM wrapping enhanced the ductility of both the non-damaged and the predamaged columns, in which ductility improvement was more noticeable in columns with the larger tie spacing. Finally, the theoretical load-carrying capacity calculated using ACI 549 provisions showed a good agreement with the experimental capacity of all tested columns.

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Section: Introductionmentioning

confidence: 97%

Experimental investigation of pre‐damaged circular RC columns strengthened with fabric‐reinforced cementitious matrix (FRCM)

Tello

Abed

Refai

et al. 2022

Structural Concrete

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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

Alhoubi

Refai

Abed

et al. 2022

Composite Structures

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Strengthening Square and Circular Low-Strength Concrete Columns with Fiber-Reinforced Cementitious Matrix: Experimental Investigation

Cited by 6 publications

References 32 publications

Experimental investigation of pre‐damaged circular RC columns strengthened with fabric‐reinforced cementitious matrix (FRCM)

Experimental investigation of pre‐damaged circular RC columns strengthened with fabric‐reinforced cementitious matrix (FRCM)

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

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

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