&lt;title&gt;Acoustic inspection of concrete bridge decks&lt;/title&gt;

Henderson, Mark; Dion, Gary N.; Costley, R. Daniel

doi:10.1117/12.339927

Cited by 14 publications

(7 citation statements)

References 1 publication

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“…Popular NDT methods include, but are not limited to: visual inspection and photographic recording, half-cell electrochemical potential, impulse type multipoint, scanning ground penetrating radar, chain drag, and impact echo. Tapping on the surface of structural elements with a hammer or metal rod and/or dragging a chain-bar across the bridge deck requires a 'calibrated' ear to determine the difference between good and bad concrete (Henderson et al 1999). To deal with human uncertainty associated with bridge inspections, Tarighat and Miyamoto (2009) used fuzzy inputs with membership functions found from statistical data and then calculated the fuzziness of the condition rating in the fuzzy inference systems.…”

Section: Introductionmentioning

confidence: 99%

Remote railroad bridge structural tap testing using aerial robots

Moreu

Ayorinde

Mason

et al. 2017

Int J Intell Robot Appl

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Infrastructure spending is a major component of railroad annual budgets and therefore must be prioritized to ensure both safety and line capacity at all times. Current inspection priorities for railroads include early detection of structural deterioration, including concrete and timber, caused by the recent increase of car load capacities. Railroad bridge inspectors conduct tap testing to detect the deterioration of concrete and timber acoustically. However, measuring railroad bridge condition in the field is a challenging task and, in general, is solely based on the inspector's experience. The results of this research describe the development, validation, and testing of a remote tap testing device that can be deployed by an aerial robot. The new tap testing device can remotely impact the surface, record the sounds of those impacts, and post-process the data to perform replacement prioritization. Tapping acoustics were analyzed both in the time and frequency domains. Principal component analysis of the data enabled the clustering of the different sets of data collected from different concrete and timber surfaces. The results quantify for the first time structural tap testing data collected with a tap testing mechanism built for deployment by an aerial robot. The goal of this work is to enable cost-effective, safer and sustainable upgrade prioritization of railroad bridge inventories.

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Section: Introductionmentioning

confidence: 99%

Remote railroad bridge structural tap testing using aerial robots

Moreu

Ayorinde

Mason

et al. 2017

Int J Intell Robot Appl

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“…For instance, we can imagine various techniques such as detection of concrete bridge-deck delamination by thermal method, inspection of bridge decks by ground penetrating radar (GPR), GPR for pavement inspection, acoustic inspection of concrete bridge decks, conventional NDE method like visual testing, etc. [2][3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

<title>Assessment of the integrity of concrete bridge structures by acoustic emission technique</title>

et al. 2002

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This study was aimed at developing a new method for assessing the integrity of concrete structures. Especially acoustic emission technique was used in carrying out both laboratory experiment and field application. From the previous laboratory study, we confirmed that AE analysis provided a promising approach for estimating the level of damage and distress in concrete structures. The Felicity ratio, one of the key parameter for assessing damage, exhibits a favorable correlation with the overall damage level. The total number of AE events under stepwise cyclic loading also showed a good agreement with the damage level. In this study, a new suggested technique was applied to several concrete bridges in Korea in order to verify the applicability in field. The AE response was analyzed to obtain key parameters such as the total number and rate of AE events, AE parameter analysis for each event, and the characteristic features of the waveform as well as Felicity ratio analysis. Stepwise loading-unloading procedure for AE generation was introduced in field test by using each different weight of vehicle. According to the condition of bridge, for instance new or old bridge, AE event rate and AE generation behavior indicated many different aspects. The results showed that the suggested analyzing method would be a promising approach for assessing the integrity of concrete structures.

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“…Previous sounding studies [5,12,16] mentioned that identification of hollow sound relies on the features of frequency spectra. Sets of impact sounding data are "trained" to identify damaged condition which is similar to human's logicbased identification.…”

Section: Feature Extractionmentioning

confidence: 99%

“…Henderson et al [12] developed an automatic chain dragging system (ACDS) which can record, analyze, and evaluate the concrete bridge deck condition. The system records chain drag sound using microphone and filter it based on linear prediction coefficients (LPC).…”

Section: Impact Sound Analysismentioning

confidence: 99%

“…The major deficiencies of the impact sounding are time consuming for large area survey and inspector-dependent interpretations to testing results. Different studies using signal processing techniques interpret impact sounds of damaged and deteriorated structures [12][13][14][15]. The damaged portion of structures using the impact sound method was determined by analyzing the frequencydomain spectra of impact sound data at sensitive ranges [14].…”

Section: Introductionmentioning

confidence: 99%

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Decision Matrix Analysis of Impact Sounding Test Method to Determine Interlayer Condition of Concrete Bridge Deck

et al. 2017

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This study focused on the analysis of the frequency spectra of impact sounding test performed on composite slabs with different interlayer condition. Distinct and consistent characteristics of the frequency spectra were observed from the impact signals. The consistency of results for bonding condition at varying temperature was also investigated. Results of laboratory tests were compared to different bonding condition observed in the field. Finally, a proposed decision matrix analysis was presented and successfully identified the interface bonding condition. The proposed decision matrix is composed of four zones characterizing each interlayer condition based on the features of impact signals. Field and laboratory assessment conform to decision matrix result.

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<title>Acoustic inspection of concrete bridge decks</title>

Cited by 14 publications

References 1 publication

Remote railroad bridge structural tap testing using aerial robots

Remote railroad bridge structural tap testing using aerial robots

<title>Assessment of the integrity of concrete bridge structures by acoustic emission technique</title>

Decision Matrix Analysis of Impact Sounding Test Method to Determine Interlayer Condition of Concrete Bridge Deck

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