Acoustic emission monitoring and damage assessment of FRP-strengthened reinforced concrete columns under cyclic loading

Ma, Gao; Li, Hui

doi:10.1016/j.conbuildmat.2017.03.169

Cited by 54 publications

(23 citation statements)

References 22 publications

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“…The constants a and b may vary significantly from a region to another region or over time. Due to some similarity between the seismic activities of the earth and AE activities originated from the damage within the material, some researchers have used this method to study the damage evolution in the concrete engineering structures [39][40][41]. In the context of AE, Gutenberg-Richter formula is modified as follows [39]:…”

Section: B-valuementioning

confidence: 99%

Barely visible impact damage assessment in laminated composites using acoustic emission

Saeedifar

Najafabadi

Zarouchas

et al. 2018

Composites Part B: Engineering

106

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Despite the key advantages of Fiber Reinforced Polymer (FRP) composites, they are susceptible to Barely Visible Impact Damage (BVID) under transverse loadings. This study investigates BVID in two quasi-isotropic carbon/ epoxy laminates under quasi-static indentation and Low-Velocity Impact (LVI) loadings using Acoustic Emission (AE). First, the evolution of interlaminar and intralaminar damages is studied by analyzing the AE signals of the indentation test using b-value and sentry function methods. Then, the specimens are subjected to the LVI loading and the induced damages are compared with the indentation test and the percentage of each damage mechanism is calculated using Wavelet Packet Transform (WPT). In consistent with the mechanical data, ultrasonic C-scan and digital camera images of the specimens, the AE results show a considerable similarity between the induced BVID under quasi-static indentation and LVI tests. Finally, the obtained results show that AE is a powerful tool to study BVID in laminated composites under quasi-static and dynamic transverse loadings.

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Section: B-valuementioning

confidence: 99%

Barely visible impact damage assessment in laminated composites using acoustic emission

Saeedifar

Najafabadi

Zarouchas

et al. 2018

Composites Part B: Engineering

106

View full text Add to dashboard Cite

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“…Some authors [16] suggest that, based on the fractal geometry approach in the mechanics of damage and fracture of heterogeneous materials, b-value should approach 1.0 with the evolution of damage. However, this conclusion is only partly supported by experimental observations [13,[24][25][26][27] (Fig. 2).…”

Section: History Parameters and B-valuementioning

confidence: 49%

Acoustic Emissions analysis of a four-point bending test on a Reinforced Concrete beam

et al. 2017

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Abstract. Assessment of existing structures by means of non-destructive techniques is an important research topic in modern engineering, because of its potential in estimating structural health status without introducing undesired damage. Among several recognized techniques, Acoustic Emission (AE) analysis is growing interest in the scientific community, since it can be used to detect the initiation of cracking processes, to determine cracking typology and to extract other information from the specimen. In this paper, the authors present the results of a four-point bending test on a Reinforce Concrete (RC) beam, performed at the University of Salerno. The test has been conducted according to a loading protocol characterised by several loading-unloading cycles, and both mechanical and acoustic data have been recorded. The results will be presented in terms of standard AE parameters, commonly adopted in literature, such as Felicity ratio, signal strength and cumulative signal strength, historic index and b value. It will be underlined that these parameters allow to detect interesting moments of the phenomenon (cracking onset and development) and to assess the damage of the structure.

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“…There is no doubt that the corrosion of reinforcement has considerable impacts on the degradation mechanism, deterioration process, and durability of RC structures. Although the previous research on compressive members [38,39] and the corrosion process in RC members [40][41][42] using the AE technique do exist, the use of AE technique in investigating the damage process of corroded RC columns is rarely documented.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission Analysis of Corroded Reinforced Concrete Columns under Compressive Loading

Jin

et al. 2020

Sensors

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In this work, the failure process of non-corroded and corroded reinforced concrete (RC) columns under eccentric compressive loading is studied using the acoustic emission (AE) technique. The results show that reinforcement corrosion considerably affects the mechanical failure process of RC columns. The corrosion of reinforcement in RC columns leads to highly active AE signals at the initial stage of loading, in comparison to the non-corroded counterparts. Also, a continuous AE hit pattern with a higher number of cumulative hits is observed for corroded RC columns. The spatial distribution and evolution of AE events indicate that the reinforcement corrosion noticeably accelerates the initiation and propagation of cracking in the RC columns during compressive loading. The AE characteristics of corroded RC columns are in agreement with the macroscopic failure behaviors observed during the damage and failure process. A damage evolution model of corroded RC columns based on the AE parameters is proposed.

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Acoustic emission monitoring and damage assessment of FRP-strengthened reinforced concrete columns under cyclic loading

Cited by 54 publications

References 22 publications

Barely visible impact damage assessment in laminated composites using acoustic emission

Barely visible impact damage assessment in laminated composites using acoustic emission

Acoustic Emissions analysis of a four-point bending test on a Reinforced Concrete beam

Acoustic Emission Analysis of Corroded Reinforced Concrete Columns under Compressive Loading

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