Monitoring of the mechanical behavior of concrete with chemically treated steel fibers by acoustic emission

Aggelis, Dimitrios G.; Soulioti, D. V.; Gatselou, E.A.; Barkoula, N.-M.; Matikas, Theodore E.

doi:10.1016/j.conbuildmat.2012.06.066

Cited by 76 publications

(32 citation statements)

References 26 publications

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“…However, after this point, E AE is always lower than W P . Moreover, the decreasing of AE energy-and thus its separation from the plastic strain energy-is in good agreement with the results reported in [21], i.e., AE energy decreases as the energy absorbed by the reinforcement through plastic deformations increases. This result also supports the increase of the b-value at the onset of yielding in the steel reinforcement [13].…”

Section: Rc Beamssupporting

confidence: 80%

Correlation of Plastic Strain Energy and Acoustic Emission Energy in Reinforced Concrete Structures

et al. 2016

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This paper presents a comparison of the acoustic emission (AE) energy and the plastic strain energy released by some reinforced concrete (RC) specimens subjected to cyclic or seismic loadings. AE energy is calculated, after proper filtering procedures, using the signals recorded by several AE low frequency sensors (25-100 kHz) attached on the specimens. Plastic strain energy is obtained by integrating the load displacement curves drawn from the measurements recorded during the test. Presented are the results obtained for: (i) two beams (with and without an artificial notch) and a beam-column connection subjected to several cycles of imposed flexural deformations; (ii) a reinforced concrete slab supported by four steel columns, and a reinforced concrete frame structure, both of the latter are subjected to seismic simulations with a uniaxial shaking table. The main contribution of this paper, which is a review of some papers previously published by the authors, is to highlight that, in all cases, a very good correlation is found between AE energy and plastic strain energy, until the onset of yielding in the reinforcing steel. After yielding, the AE energy is consistently lower than the plastic strain energy. The reason is that the plastic strain energy is the sum of the contribution of concrete and steel, while the AE energy acquired with thresholds higher than 35 dB AE captures only the contribution of the concrete cracking, not the steel plastic deformation. This good correlation between the two energies before the yielding point also lends credibility to the use of AE energy as a parameter for concrete damage evaluation in the context of structural health monitoring.

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Section: Rc Beamssupporting

confidence: 80%

Correlation of Plastic Strain Energy and Acoustic Emission Energy in Reinforced Concrete Structures

et al. 2016

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“…Typical mechanical description of steel fiber‐reinforced concrete (SFRC) and plain concrete specimens correlated to acoustic emission (AE) activity .…”

Section: Resultsmentioning

confidence: 99%

Damage detection of SFRC concrete beams subjected to pure torsion by integrating acoustic emission and Weibull damage function

Behnia

Chai

Ranjbar

et al. 2015

Struct. Control Health Monit.

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Summary In some cases, torsion is the dominant or critical factor contributing to the failure of a concrete member. This research proposes a novel damage detection method for fiber‐reinforced concrete beams subjected to pure torsion loading by statistical analysis of acoustic emission (AE) data. Concrete beams with varying water/cement ratios and different fiber volume fractions were subjected to pure torsion during AE monitoring. It was found that the cumulative AE event with respect to the twist angle correlated well to the mechanical loading. A Weibull rupture probability distribution is introduced to quantitatively predict the mechanical damage behavior under pure torsion. A bi‐logarithmic regression analysis is carried out to calibrate the Weibull damage distribution function with the detected AE data in order to characterize the torsion fracture process. Moreover, a quantitative approach by means of b‐value results is presented in this article to further analyze damage and fracture process. Torsion fracture properties were correlated to the AE parameters, and it was shown that the magnitudes of AE parameters were influenced significantly by mechanical properties of specimens. Therefore, AE would be suitable to describe the fracture of concrete specimens subjected to torsion. Copyright © 2015 John Wiley & Sons, Ltd.

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“…By using a proper array of sensors mounted on the RC structure, it is theoretically possible to determine the location of the AE source by analyzing the arrival times of the waves to each sensor . Similarly, AE testing can be used to study the initiation and growth of cracks in concrete in real time …”

Section: Introductionmentioning

confidence: 99%

“…3,4 Similarly, AE testing can be used to study the initiation and growth of cracks in concrete in real time. [5][6][7][8][9][10] It is known that "damage" is physical harm that impairs the value, usefulness, or normal function of something. Over the past few years, researchers have attempted to study the state of damage in RC structures using parameterbased AE monitoring techniques.…”

Section: Introductionmentioning

confidence: 99%

Determination of yielding point by means a probabilistic method on acoustic emission signals for application to health monitoring of reinforced concrete structures

Sagar

Kumar

Prasad

et al. 2018

Struct Control Health Monit

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Summary Reinforced concrete (RC) flanged beam specimens were tested under incremental cyclic load till failure in flexure, and simultaneously, the acoustic emission (AE) signals released by the specimens were recorded. To assess damage in RC structures, a previously published index of damage (ID) based on AE signals was used. This index, however, needs to know the yielding point of the specimen. In the present study, yielding point was identified with a probabilistic method known as Gaussian mixture modeling (GMM) applied to the AE signals, as compared with that obtained by means of the plastic strain energy. It was observed that yielding load obtained with both methodologies was almost same, thus validating the GMM method. This result permits to use the ID index for damage monitoring of RC structure in practical scenarios, by using only information hidden in the AE signals. The influence of loading rate, failure type (tensile and shear), RC beam depth, concrete compressive strength, and percentage of tensile steel reinforcement on ID were studied in this work.

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Monitoring of the mechanical behavior of concrete with chemically treated steel fibers by acoustic emission

Cited by 76 publications

References 26 publications

Correlation of Plastic Strain Energy and Acoustic Emission Energy in Reinforced Concrete Structures

Correlation of Plastic Strain Energy and Acoustic Emission Energy in Reinforced Concrete Structures

Damage detection of SFRC concrete beams subjected to pure torsion by integrating acoustic emission and Weibull damage function

Determination of yielding point by means a probabilistic method on acoustic emission signals for application to health monitoring of reinforced concrete structures

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