Crack classification in concrete based on acoustic emission

Ohno, Kentaro; Ohtsu, Masayasu

doi:10.1016/j.conbuildmat.2010.05.004

Cited by 856 publications

(317 citation statements)

References 12 publications

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“…In the experiment tests on the cementitious material applying AE technique, a damage modes classifying method using AE parameters such as Average Frequency (AF, kHz) and RA (Rise-Time per Amplitude, ms/V) is presented in RILEM TC 212-ACD [12]. In this CPRI test, the RA and AF values are calculated and displayed on the same graph as shown in Fig.…”

Section: Evolution Of Ra and Af Versus Damage Modesmentioning

confidence: 99%

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Damages Assessment of Cement-Paste and Cobblestone Interfacial Transition Zone by Acoustic Emission

et al. 2018

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Abstract. In cementitious materials, bonding at the contact surface between cement-paste and coarse aggregates plays an important role and determines the durability of the material. Recent studies have evaluated the impact strength on this contact surface by experiments on different surface roughness aggregates and concluded that the contact area between the two components was the weakest zone in concrete. This paper presents experiment test on cement-paste and cobblestone contact surface to determine the types of damage modes using Acoustic Emission Technique. The result is that the shear stress occupies only about 10% of the total stress experienced on the contact surface.

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Section: Evolution Of Ra and Af Versus Damage Modesmentioning

confidence: 99%

“…In the light of RILEM TC 212-ACD [12], the shearinduced damage under compression test on CPRI were performed to verify the stress proportion at ITZ between cement-paste and cobblestone. The RA method is applied to classify the damage modes in the samples.…”

Section: Evolution Of Moving Average 100-hit Ra and Af Versus Damagementioning

confidence: 99%

Damages Assessment of Cement-Paste and Cobblestone Interfacial Transition Zone by Acoustic Emission

et al. 2018

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“…The acoustic emission (AE) technique has been extensively used for real time detection of internal damage propagation in structural materials [17][18][19][20]. In this technique, piezoelectric sensors are used to detect high-frequency mechanical waves produced from the release of strain energy during fracture and crack propagation.…”

Section: Frp Debonding Detection With Aementioning

confidence: 99%

Debonding damage analysis in composite-masonry strengthening systems with polymer- and mortar-based matrix by means of the acoustic emission technique

Verstrynge

Wevers

Ghiassi

et al. 2015

Smart Mater. Struct.

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This is the postprint of a paper published as: Verstrynge, E., Wevers, M., Ghiassi, B., Lourenço, P. (2016 ABSTRACT: Different types of strengthening systems, based on fiber reinforced materials, are under investigation for external strengthening of historic masonry structures. A full characterization of the bond behavior and of the short-and long-term failure mechanisms is crucial to ensure effective design, compatibility with the historic substrate and durability of the strengthening solution. Therein, nondestructive techniques are essential for bond characterization, durability assessment and on-site condition monitoring. In this paper, the Acoustic Emission (AE) technique is evaluated for debonding characterization and localization on Fiber Reinforced Polymer (FRP)-and Steel Reinforced Grout (SRG)-strengthened clay bricks. Both types of strengthening systems are subjected to accelerated ageing tests under thermal cycles and to single-lap shear bond tests. During the reported experimental campaign, AE data from the accelerated ageing tests demonstrated the thermal incompatibility between brick and epoxy-bonded FRP composites and debonding damage was successfully detected, characterized and located. In addition, a qualitative comparison is made with digital image correlation and infrared thermography, in view of efficient on-site debonding detection.

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“…Recently, various non-destructive testing (NDT) methods have been developed for evaluation of concrete structures, e.g. vibration-based methods [1], ground penetrating radar [2], acoustic emission [3], or infrared thermography [4]. Methods utilizing the phenomenon of wave propagation, including ultrasonic testing, the impact-echo method and the Lamb wave modes [5][6][7][8][9] are particularly interesting.…”

Section: Introductionmentioning

confidence: 99%

A novel formulation of 3D spectral element for wave propagation in reinforced concrete

Rucka

Witkowski²,

Chróścielewski³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The paper deals with numerical simulations of wave propagation in reinforced concrete for damage detection purposes. A novel formulation of a 3D spectral element was proposed. The reinforcement modelled as the truss spectral element was embedded in the 3D solid spectral finite element. Numerical simulations have been conducted on cuboid concrete specimens reinforced with two steel bars. Different degradation models were considered to study the real behaviour of bended beams. In wave propagation modelling the spectral element method (SEM) plays an important role [16]. The SEM method is based on the high-order finite elements, usually of class C 0 . As a special feature, the elements have their nodes distributed both in physical space and in parent elements according to the Gauss-Lobatto-Legendre quadrature rule. As a consequence, it is possible to obtain a diagonal mass matrix at the element level which in turn, when appropriately taken into account, leads to fast and efficient time marching scheme. A multitude of aspects pertaining to SEM, especially for modelling of seismic waves (e.g. [17,18]) as well as for wave propagation for SHM purposes (e.g. [19]), have been already discussed. Spectral elements have been also developed for structural type finite elements like rods, beams or plates (e.g. [14,15,[20][21][22][23][24][25][26][27]), with the attention paid to theoretical aspects of wave propagation phenomena. In paper [28], 3-dimensional spectral elements have been presented, with application to damage detection in metal plate structures. Unbounded structures need a special treatment to preserve the dissipation of the energy in the infinite. The use of absorbing layers has been proposed in [29], on the example of a 1-dimensional rod and a 3-dimensional half-cylindrical shell. As far as damage detection is concerned, various techniques applied to simulation of damage effects have been considered. One can refer for instance to [20][21][22] where discontinuities in the form of cracks/caverns or point masses have been accounted for. A semi-analytical approach in analysis of flexural wave propagation through a slender beam, with a breathing edge-crack, is developed in [30]. In the context of non-homogenous material reference [31] discusses the use of the SEM with functionally graded material (FGM). To the authors' best knowledge, the problem of wave propagation in damaged reinforced concrete with the use of SEM has been not investigated.The present study focuses on development of a novel 3D spectral element for wave propagation in reinforced concrete subjected to mechanical degradation. Numerical simulations have been conducted on cuboid concrete specimens reinforced with two steel bars. Different degradation models were considered to reflect the real behaviour of bended beams described in [11].

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Crack classification in concrete based on acoustic emission

Cited by 856 publications

References 12 publications

Damages Assessment of Cement-Paste and Cobblestone Interfacial Transition Zone by Acoustic Emission

Damages Assessment of Cement-Paste and Cobblestone Interfacial Transition Zone by Acoustic Emission

Debonding damage analysis in composite-masonry strengthening systems with polymer- and mortar-based matrix by means of the acoustic emission technique

A novel formulation of 3D spectral element for wave propagation in reinforced concrete

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