Corrosion monitoring of post-tensioned concrete structures using fractal analysis of guided ultrasonic waves

Moustafa, Ayman; Niri, Ehsan Dehghan; Farhidzadeh, Alireza; Salamone, Salvatore

doi:10.1002/stc.1586

Cited by 37 publications

(27 citation statements)

References 24 publications

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“…The AE technique is a passive method and is employed for continuous health monitoring of cables, but it cannot capture existing failure. For the damage detection in anchorage zone, GUWs technique is proved to be a very effective method and thus it has gained more and more interest [4].…”

Section: Introductionmentioning

confidence: 99%

Damage detection using high order longitudinal guided waves (HOLGW) in the anchorage zone of stayed cable

Pan¹,

Jin²,

Feng³

et al. 2017

AIP Conference Proceedings

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Abstract. High order longitudinal guided waves (HOLGW) are studied for the damage detection in the anchorage zone of stayed cable through the theoretical analysis, numerical simulation and experimental validation. First, based on the theory of elastic wave propagation in cylinder, the dispersion curves of longitudinal modes were obtained and calculated analytically and the high-frequency such as 5MHz corresponding to the higher order longitudinal guided wave modes are identified for the damage detection. Then, the ultrasonic guided waves propagating in a steel wire with or without defects were simulated by using the finite element method and the effects of defect depth and length on the reflection coefficient are studied. Finally, the free wires and a tested cable were studied experimentally. The results show that the finite element method is able to model the high-order guided wave propagation in the steel wire. The agreement between the experiment and theory has demonstrated that the HOLGW is a potential candidate for the damage detection in anchorage zones of stayed-cables. .

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Section: Introductionmentioning

confidence: 99%

Damage detection using high order longitudinal guided waves (HOLGW) in the anchorage zone of stayed cable

Pan¹,

Jin²,

Feng³

et al. 2017

AIP Conference Proceedings

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“…Iturrioz et al got a quantitative evaluation of damage in concrete through the fractal dimension of AE signals distribution in the damaged domain [12]. Moustafa et al presented a new approach based on fractal analysis of guided AE waves for monitoring the corrosion evolutionary path in posttensioned systems [13]. Invernizzi et al confirmed that the energy dissipation during micro crack propagation in concrete occurs in a fractal domain [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Treatment on Fractals in Acoustic Emission of Rock Material

Zhang

Sun

et al. 2016

Advances in Materials Science and Engineering

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Acoustic emission (AE) series on time and location distributions on space are all fractal during the failure process of rock material. In this paper, AE signals of heated rock samples at different temperature under uniaxial compression were captured, and the correlation fractal dimensions (CFDs) of AE counts series at different stress level were calculated using Grassberger-Procaccia algorithm. The temperature effect on AE fractal behavior was revealed. The results show that as the heat temperature increases, the total AE counts are more, while the peak value is less. With the increase of external loading, the AE CFD increases fast to a peak at first and then decreases to a bottom and, after that, increases again but within a narrow range. 200°C and 800°C are two thresholds. As the heat temperature rises, the maximum CFD value and the corresponding stress level both increase from 25°C to 200°C and decrease from 200°C to 800°C and then increase again from 800°C to 1200°C. The CFD value at the failure point shows polynomial decline with rising heat temperature.

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“…Moustafa et al . monitored the propagation pattern of corrosion of post‐tensioned structures by means of the fractal dimension of ultrasonic waves measured in steel tendons. Li et al .…”

Section: Introductionmentioning

confidence: 99%

“…Adhikari et al [4] proposed an integral model based on digital image processing for numerical quantification of cracks, pattern variations, and neurological connection between cracks. Moustafa et al [5] monitored the propagation pattern of corrosion of post-tensioned structures by means of the fractal dimension of ultrasonic waves measured in steel tendons. Li et al [6] identified seismic damage of shear-type building structures based on the joint implementation of time-frequency analysis and fractal dimension characteristics.…”

Section: Introductionmentioning

confidence: 99%

Assessment of seismic damage of thin and lightly reinforced concrete walls using fractal dimension of cracking

Carrillo

Avila

2016

Earthq Engng Struct Dyn

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Summary Length, maximum width, and residual width of cracks are key indicators of structural damage. However, pattern and propagation of cracks on the affected structural component should be also considered. In addition, damage evaluation based on visual inspection is a subjective and capricious procedure because the damage assessment relies on the expertise and judgment of the inspector engineer. In order to assess a rapid and reliable evaluation approach of seismic damage, pattern and propagation of cracks observed in thin and lightly reinforced concrete walls for low‐rise housing subjected to seismic demands are evaluated in this study by means of fractal dimension of cracking pattern. The proposed parameters are based on the results of an experimental program that comprised 39 low‐rise RC wall specimens having typical variables of this type of housing, such as low compressive strengths of concrete, thin walls, low axial loads, low reinforcement ratios, and web shear reinforcement made of deformed bars and welded‐wire meshes. A statistical analysis is carried out for computing values of fractal dimension associated to cracking patterns at key damage conditions. Recommendations of this study can help the inspector in estimating the current limit state or performance level of the wall and the story‐drift ratio experienced by the wall during shaking. Copyright © 2016 John Wiley & Sons, Ltd.

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Corrosion monitoring of post-tensioned concrete structures using fractal analysis of guided ultrasonic waves

Cited by 37 publications

References 24 publications

Damage detection using high order longitudinal guided waves (HOLGW) in the anchorage zone of stayed cable

Damage detection using high order longitudinal guided waves (HOLGW) in the anchorage zone of stayed cable

Effect of Thermal Treatment on Fractals in Acoustic Emission of Rock Material

Assessment of seismic damage of thin and lightly reinforced concrete walls using fractal dimension of cracking

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