Critical defect size distributions in concrete structures detected by the acoustic emission technique

Carpinteri, Alberto; Lacidogna, Giuseppe; Niccolini, Gianni; Puzzi, Simone

doi:10.1007/s11012-007-9101-7

Cited by 114 publications

(98 citation statements)

References 28 publications

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“…The last analysis can be performed by calculating the b-value from the Gutenberg-Richter (GR) law. Even though two different dimensional scales are involved, the GR law can be applied in the same way for earthquake distributions in seismic areas as well as for the structural monitoring by the AE technique [4,11,12].…”

Section: Critical Conditions and Fracture Modesmentioning

confidence: 99%

Acoustic Emission and Modal Frequency Variation in Concrete Specimens under Four-Point Bending

2017

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Abstract:The Acoustic Emission (AE) and Dynamic Identification (DI) techniques were applied simultaneously, in an original way, to examine the stress dependent damage progress in pre-notched concrete beams tested in four-point bending. The damage mechanisms were characterized by analyzing the AE signals registered during the tests, conducted by increasing the specimen's vertical deflection. In particular, the dominant fracture mode was identified, and correlations between dissipated and emitted energies were investigated. Moreover, variations in the natural bending frequencies, produced by the crack advancement under loading, were detected and put in relation with the cumulated AE energy. Two different types of piezoelectric (PZT) sensors, operating in well distinct frequency ranges, were used to measure AE and modal signals. This study may be of interest with an outlook on possible correlations between a multi-parameter structural monitoring and the solution of inverse problems by numerical models.

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Section: Critical Conditions and Fracture Modesmentioning

confidence: 99%

Acoustic Emission and Modal Frequency Variation in Concrete Specimens under Four-Point Bending

2017

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“…By analogy with seismic phenomena, in the AE technique the magnitude may be defined as follows [15,16]:…”

Section: The B-value and The Damage Fractal Domainmentioning

confidence: 99%

“…In particular, the amplitudes of AE signals are distributed according to the Gutenberg-Richter (GR) law and could be described through the b-value. This value, mutuated from the seismological analysis, decreases systematically with the damage evolution [15,16]. Since the cracking is a multiscale phenomenon, recently AE data have been interpreted by statistical and fractal theories considering the relation between the b-value and the fractal dimension D in which the damage take place [15,16].…”

mentioning

confidence: 99%

“…This value, mutuated from the seismological analysis, decreases systematically with the damage evolution [15,16]. Since the cracking is a multiscale phenomenon, recently AE data have been interpreted by statistical and fractal theories considering the relation between the b-value and the fractal dimension D in which the damage take place [15,16]. In the last two decades, the properties of fractality and multifractality of fracture surfaces have been widely recognized in the case of quasibrittle [17][18][19][20][21][22].…”

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confidence: 99%

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Acoustic Emission Monitoring of Rock Specimens During Fatigue Tests

Zhou

Manuello

Lacidogna

et al. 2014

Fracture, Fatigue, Failure, and Damage Evolution, Volume 5

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Some of the most significant civil and historical structures, such as bridges, viaducts, dams and ancient monumental buildings, may collapse below the critical loading conditions due to fatigue effects. In the present paper, damage level evolution during fatigue tests of rock specimens will be evaluated by Acoustic Emission technique (AE). The fundamental parameters of AE will be analyzed in order to interpret the damage level evolution. The relationships between the cumulative AE counts and the damage accumulation during fatigue experiments will be considered for different kinds of iron-rich rocks (granite, basalt, magnetite). The achievement of critical conditions will be recognized through synthetic parameters based on AE, such as the b-value of the Gutenberg-Richter law and considering the increase in low-frequency components during the damage accumulation.

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“…In fact, concrete should be viewed as a quasi-brittle material having a size-dependent behaviour [21]. Nevertheless, in the adopted design model [22] concrete is considered to be a rigid-plastic material, which is characterized by a single parameter, f c , the uniaxial concrete compressive strength measured on cylinders.…”

Section: Description Of the Materialsmentioning

confidence: 99%

Design of reinforcement for concrete co-planar shell structures using optimization techniques

Espín

Martí

2009

Meccanica

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The absence of universally accepted solutions for the design of reinforcement in plates and shells in the structural concrete codes, and the constant development of computers combined with powerful numerical methods, reveal the need for a standard procedure to calculate the required reinforcement in thin elements subject to membrane and flexural forces. In the present study, the amount of reinforcement is optimized locally for each finite element of the mesh that models the geometry of the problem. Some numerical examples are given and compared to the results provided by other authors, achieving significant savings in reinforcement.

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Critical defect size distributions in concrete structures detected by the acoustic emission technique

Cited by 114 publications

References 28 publications

Acoustic Emission and Modal Frequency Variation in Concrete Specimens under Four-Point Bending

Acoustic Emission and Modal Frequency Variation in Concrete Specimens under Four-Point Bending

Acoustic Emission Monitoring of Rock Specimens During Fatigue Tests

Design of reinforcement for concrete co-planar shell structures using optimization techniques

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