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Open AccessArticle

An Integrated Approach to Real-Time Acoustic Emission Damage Source Localization in Piled Raft Foundations

1
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
2
Deep Subsurface Research Center, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, Korea
3
Department of Civil and Environmental Engineering, Pusan National University (PNU), Busan 46241, Korea
4
Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute (KAERI), Daejeon 34057, Korea
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(23), 8727; https://doi.org/10.3390/app10238727
Received: 21 October 2020 / Revised: 2 December 2020 / Accepted: 2 December 2020 / Published: 5 December 2020
(This article belongs to the Special Issue Advances in Geotechnical Engineering Ⅱ)
Acoustic emission (AE) has garnered significant interest as a promising way to detect the early-stage development of internal cracks and damage in underground and geotechnical structures, associated with natural disasters. Meanwhile, AE source localization techniques that can identify the damage location in a piled-raft foundation (PRF) are premature because of its complex geometry, although the PRF is a widely used deep foundation type for high-rise buildings. In this study, we propose an integrated approach to localize AE sources in the PRF by using the modified Akaike information criterion (AIC) method and examine its accuracy to mark with pile zones. We performed a series of experiments on a scaled PRF model at a ratio of 1:50, composed of one raft and 25 piles. The results demonstrate that the combined approach with the modified AIC method and the Simplex method can localize the AE source zones with good accuracy, greater than 95% on average. The suggested two-stage AIC picker shows accurate onset time determination, and hence, it significantly improves the accuracy, particularly effective for the signals with low signal-to-noise ratios. The approach exploiting the two-stage AIC picker can be readily used for automated real-time AE monitoring to detect crack generation and its location in buried foundations that cannot be inspected visually. View Full-Text
Keywords: source localization; acoustic emission; damage; non-destructive test; piled-raft foundation; real-time monitoring; onset time source localization; acoustic emission; damage; non-destructive test; piled-raft foundation; real-time monitoring; onset time
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MDPI and ACS Style

Kim, Y.-M.; Han, G.; Kim, H.; Oh, T.-M.; Kim, J.-S.; Kwon, T.-H. An Integrated Approach to Real-Time Acoustic Emission Damage Source Localization in Piled Raft Foundations. Appl. Sci. 2020, 10, 8727. https://doi.org/10.3390/app10238727

AMA Style

Kim Y-M, Han G, Kim H, Oh T-M, Kim J-S, Kwon T-H. An Integrated Approach to Real-Time Acoustic Emission Damage Source Localization in Piled Raft Foundations. Applied Sciences. 2020; 10(23):8727. https://doi.org/10.3390/app10238727

Chicago/Turabian Style

Kim, Yong-Min; Han, Gyeol; Kim, Hyunwoo; Oh, Tae-Min; Kim, Jin-Seop; Kwon, Tae-Hyuk. 2020. "An Integrated Approach to Real-Time Acoustic Emission Damage Source Localization in Piled Raft Foundations" Appl. Sci. 10, no. 23: 8727. https://doi.org/10.3390/app10238727

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