Efficient damage inspection of deteriorated RC bridge deck with rain-induced elastic wave

Takamine, Hidefumi; Watabe, Kazuo; Miyata, Hirokazu; Asaue, Hisafumi; Nishida, Takahiro; Shiotani, Tomoki

doi:10.1016/j.conbuildmat.2018.01.100

Cited by 14 publications

(9 citation statements)

References 2 publications

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“…A good correlation was demonstrated between fatigue cracking and wave speed loss. Takamine et al [186] used a variation of this method in deck inspection.…”

Section: Sensing and Signal Processingmentioning

confidence: 99%

Review on Structural Health Evaluation with Acoustic Emission

Ono

2018

Applied Sciences

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This review introduces several areas of importance in acoustic emission (AE) technology, starting from signal attenuation. Signal loss is a critical issue in any large-scale AE monitoring, but few systematic studies have appeared. Information on damping and attenuation has been gathered from metal, polymer, and composite fields to provide a useful method for AE monitoring. This is followed by discussion on source location, bridge monitoring, sensing and signal processing, and pressure vessels and tanks, then special applications are briefly covered. Here, useful information and valuable sources are identified with short comments indicating their significance. It is hoped that readers note developments in areas outside of their own specialty for possible cross-fertilization.

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“…A good correlation was demonstrated between fatigue cracking and wave speed loss. Takamine et al [186] used a variation of this method in deck inspection.…”

Section: Sensing and Signal Processingmentioning

confidence: 99%

Review on Structural Health Evaluation with Acoustic Emission

Ono

2018

Applied Sciences

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“…12 with conditions' observation by sampled cores. The lateral cracks were located at 150 mm or less from the surface of the deck (mostly in the top layer) by visual inspection of the cored samples [16]. Therefore, it is reasonably understood that attenuation rate in top layer are lower than bottom layer.…”

Section: Attenuation Tomographymentioning

confidence: 91%

Lateral Damage Identification in RC Slabs by Several Tomographic Approaches with Rainy Induced Elastic Waves

Shiotani¹,

Hashimoto²,

Asaue³

et al. 2018

SV-JME

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It is generally recognized that preventive and proactive maintenance works are necessary for such important infrastructure as bridges and tunnels. For reinforced concrete (RC) members, essential issues include establishing a maintenance system with the appropriate measures prior to the extensive damage and failure.As a result of budgetary restrictions, preventive and proactive maintenance of infrastructure are desired, and thus inspections by non-destructive testing (NDT) methods providing early damage information must be applied. In terms of the damage assessment and estimation of repair and retrofit recovery in concrete structures, in addition to current NDT, innovative methods must be established.The authors are thus studying tomography techniques based on elastic waves and acoustic emission (AE) to visualize three dimensional internal defects in concrete. In AE tomography, past reports can be found in literatures [1] and [2]; however, as they did not consider diversion of wave propagation paths (hereafter referred to as ray paths), few successful results can be obtained. In consideration of the diversion of the ray paths, the basic analytical procedure and the applicability of these techniques have already been reported as elastic-wave tomography [3] and AE tomography [4] by authors.Through the tomography technique, internal conditions are obtained using elastic wave parameters such as amplitudes and elastic wave velocities. This technique has been developed in the field of seismology and geophysics [5] to [7] as well as ultrasonic [8] to [10]. In this study, elastic wave velocity and attenuation rate are [11] used as the parameter. In elastic wave tomography, both the location of the excitation and the excitation time are known, whereas they are unknown for AE tomography. Specifically, the tomography can evaluate the elastic wave velocity Efficient inspection techniques for ageing infrastructures are in great demand. In this study, rainy induced acoustic activity, which has so far been treated as a nuisance event for acoustic monitoring, is ambitiously utilized to identify damages of reinforced concrete (RC) slabs. Specifically, in-situ acoustic emission (AE) measurements of RC bridge slabs are conducted for a week. First, internal damages of the slabs are evaluated by both of AE activity and elastic wave velocity by means of AE monitoring and AE tomography. As for some representative locations showing each different damage estimated by the AE activity and the velocity, core samples are retrieved for the verification. In addition, AE activity induced by rain droplets in a short period of minutes are identified by an AE source location algorithm followed by computation on attenuation rate distribution. Through the evaluations, it was found that the distribution of AE sources induced by precipitation could reflect internal damage of RC slabs i.e., dense areas of source locations imply the intact or minor damage, while sparse areas of source locations suggest serious damage of RC decks. With this finding, the p...

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“…Kravchuk et al developed a neural network‐based method to characterise AE signals during split cylinder fracture of fibre‐reinforced UHPC, and AE results revealed an energy dissipation shift during damage progression. Takamine et al analysed rain‐induced elastic waves and detected cracks deep inside RC decks successfully; furthermore, they suggested that heavy rain was a good elastic wave source for deterioration detection. This work is very interesting and impressive.…”

Section: Introductionmentioning

confidence: 99%

Relation between the shear stress distribution and the resulting acoustic emission variation in concrete beams

Liu

Zhou

et al. 2020

Struct Control Health Monit

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Acoustic emission (AE) technology is extensively acknowledged as a promising structural health monitoring (SHM) approach; meanwhile, AE monitoring has long been criticised for a lack of quantitative results. This work revealed a strong correlation between the shear stress distribution and the resulting AE distribution, enabling accurate and real-time quantification of the shear stress states in concrete beams using only AE measurements. This paper started by introducing the AE phenomenon and the theoretical distribution of the shear stresses on a beam cross section, which revealed that the distributions of the stresses and the resulting emissions inherently correlate to each other. Twelve reinforced concrete beams were then tested, deploying devices including an AE system. The results showed that the AE source intensity distribution strongly correlated with that of the shear stresses in a beam segment when the beam was in both the working stage and the failure phase and that the matching degree of these two distribution curves varied from 79.20% to 94.12%. The correlation revealed in the paper will boost a wide range of significant AE-based scientific research and engineering applications, including SHM and non-destructive testing. K E Y W O R D Sacoustic emission (AE), AE source distribution intensity, concrete, shear stress, structure health monitoring (SHM)

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Efficient damage inspection of deteriorated RC bridge deck with rain-induced elastic wave

Cited by 14 publications

References 2 publications

Review on Structural Health Evaluation with Acoustic Emission

Review on Structural Health Evaluation with Acoustic Emission

Lateral Damage Identification in RC Slabs by Several Tomographic Approaches with Rainy Induced Elastic Waves

Relation between the shear stress distribution and the resulting acoustic emission variation in concrete beams

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