Abstract
Chain drag testing is a common practice for bridge deck evaluation owing to its low cost and ease of use. Delaminations in bridge decks are identified by hollow sounds when steel chain is dragged on deck surface. However, this method is subjective, and result interpretation depends on the experience of the operators. Traffic noise also affects the test speed and accuracy of results. This paper presents an automated acoustic scanning system to detect delaminations in concrete structures, including bridge decks. The system consists of an array of ball-chain impactors, a noncontact MEMS microphone sensor array, multi-channel data acquisition device, RTK GPS positioning system, and signal processing schemes. A delamination identification algorithm was then developed to identify the positions and dimensions of delaminations. The acoustic scanning system and the delamination identification algorithm were validated in field tests of concrete bridge decks. The system can scan a concrete bridge deck at walking speed with half- or full-lane width coverage. Compared to the conventional manual chain drag test, the automated system provides improved efficiency, accuracy, repeatability, and practicality.
Original language | English |
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Title of host publication | Advancements on Sustainable Civil Infrastructures - Proceedings of the 5th GeoChina International Conference 2018 – Civil Infrastructures Confronting Severe Weathers and Climate Changes |
Subtitle of host publication | From Failure to Sustainability, 2018 in HangZhou, China |
Editors | Don Chen, Sonny Kim, Anand Tapase |
Publisher | Springer Science and Business Media B.V. |
Pages | 150-160 |
Number of pages | 11 |
ISBN (Print) | 9783319962405 |
DOIs | |
State | Published - 2019 |
Externally published | Yes |
Event | 5th GeoChina International Conference on Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, 2018 - HangZhou, China Duration: Jul 23 2018 → Jul 25 2018 |
Publication series
Name | Sustainable Civil Infrastructures |
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ISSN (Print) | 2366-3405 |
ISSN (Electronic) | 2366-3413 |
Conference
Conference | 5th GeoChina International Conference on Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, 2018 |
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Country/Territory | China |
City | HangZhou |
Period | 07/23/18 → 07/25/18 |
Funding
Fig. 10. Scanning results of a 30 m long bridge deck section: a scan #1, b scan #2, c scan #3, d scan #4 Acknowledgements. This study was sponsored by the Nebraska Department of Transportation (NDOT). The Bridge Division of NDOT is gratefully acknowledged for their support on traffic control during the field test. The authors would also like to thank Sepehr Pashoutani and Hossein Arian for their help on the field test.
Keywords
- Acoustic Scanning
- Bridge Deck
- Concrete Bridge Decks
- Delamination Identification
- Drag Chain