Assessment of the Integrity of Reinforced Concrete Beams Strengthened With Carbon Fibre Reinforced Polymer Using the Acoustic Emission Technique

Saliah, Soffian Noor Mat

doi:10.3389/fmech.2022.885645

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…An alternative approach to studying the flexural behavior of RC specimens under various loading conditions is using the acoustic emission method. Mat Saliah and Md Nor [ 30 ] extensively investigated this method in the context of assessing the structural integrity of concrete beams reinforced with composite materials. This technique evaluates microscopic damage within concrete elements caused by different external loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads

et al. 2023

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Current technology development ensures a variety of advanced materials and options for reinforcing concrete structures. However, the absence of a uniform testing methodology complicates the quantification and comparative analysis of the mechanical performance of the composite systems. The repeated mechanical loads further complicate the issue. This research extends the recently developed residual stiffness assessment concept to the repeated loading case. It provides an engineer with a simplified testing layout and analytical model to quantify the residual flexural stiffness of standardized laboratory specimens subjected to repeated cycling loads. This model explicitly relates the particular moment and curvature values, requiring neither iterative calculations nor the load history. Thus, this feature allows residual stiffness quantification under repeated loading conditions, including complete reloading of the beam samples imitating the structural strengthening procedure; the proposed technique is equally efficient in quantifying the residual stiffness of the beam samples with any combinations of fiber-reinforced polymer (FRP) reinforcements, i.e., embedded bars, near-surface-mounted strips, and externally bonded sheets. This study employs 12 flexural elements with various reinforcement and loading layouts to illustrate the proposed methodology’s efficiency in quantifying the residual strength of the tension concrete, which estimates the efficiency of the reinforcement system. The explicit quantifying of the residual resistance of the FRP reinforcement systems under repeated load cycles describes the essential novelty of this work.

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Section: Introductionmentioning

confidence: 99%

Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads

et al. 2023

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Flexural stiffness analysis of concrete elements with composite reinforcement under repeated load and elevated temperature

Sultani

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Vadovasdr. Viktor GRIBNIAK (Vilniaus Gedimino technikos universitetas, medžiagų inžinerija -T 008). Vilniaus Gedimino technikos universiteto Medžiagų inžinerijos mokslo krypties disertacijos gynimo taryba: Pirmininkė dr. Agnė KAIRYTĖ (Vilniaus Gedimino technikos universitetas, Medžiagų inžinerija -T 008). Nariai: dr. Valentin ANTONOVIČ (Vilniaus Gedimino technikos universitetas, Medžiagų inžinerija -T 008), prof. dr. Darius BAČINSKAS (Vilniaus Gedimino technikos universitetas, Statybos inžinerija -T 002), prof. dr. Yuri RIBAKOV (Arielio universitetas, Izraelis, Medžiagų inžinerija -T 008), prof. dr. Žymantas RUDŽIONIS (Kauno technologijos universitetas, Statybos inžinerija -T 002). Disertacija bus ginama viešame Medžiagų inžinerijos mokslo krypties disertacijos gynimo tarybos posėdyje 2024 m. gegužės 16 d. 10 val. Vilniaus Gedimino technikos universiteto SRA-I posėdžių salėje.

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Intensity Analysis Method of Acoustic Emission Signals for the Damage Monitoring of Post-Tensioned Concrete Beams

Bruno,

Scionti,

Calabrese

et al. 2024

Materials

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Acoustic emission (AE) is well suited for the real-time monitoring and detection of damage in reinforced concrete structures. In this study, loading/unloading cycles up to failure were applied on three different full-scale beams, each with varying defect morphologies. An intensity analysis method was employed to assess the damage sensitivities of the defective structures under stress conditions. Specifically, the calm ratio, load ratio, severity, and historical index were identified as statistical parameters that can provide global information on the damage level. Consequently, they can be easily used as damage evolution indexes for reinforced concrete structures. Correlations between these parameters were investigated to better discriminate between their potentials and identify critical levels that might not be evident using parametric analysis. The AEI chart helps locate damaging areas, aiding focused repairs. For defected beams with broken strands, at low load, HI and SI fall in zone B (damage detected). At cycles 4 and 6, with significant deflection, they fall into a critical zone, E (severe damage). Comparing post-tensioned beams revealed defects correlating with damage susceptibility. B3 beams with diffused defects displayed high activity at higher loads. Applying a load–calm ratio chart, initial minor damage worsened progressively. Severe damage was prominent in defective B2 and B3 beams, reaching zone 3. The variation in the acquired parameters over time can then be considered as an affordable and reliable indicator of damage progression.

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Assessment of the Integrity of Reinforced Concrete Beams Strengthened With Carbon Fibre Reinforced Polymer Using the Acoustic Emission Technique

Cited by 3 publications

References 19 publications

Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads

Quantifying the Residual Stiffness of Concrete Beams with Polymeric Reinforcement under Repeated Loads

Flexural stiffness analysis of concrete elements with composite reinforcement under repeated load and elevated temperature

Intensity Analysis Method of Acoustic Emission Signals for the Damage Monitoring of Post-Tensioned Concrete Beams

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