Nondestructive Damage Detection of Concrete With Alkali-Silica Reactions Using Coda Wave and Anomaly Detection
- Georgia Institute of Technology, Atlanta, GA (United States)
- Univ. of Nebraska-Lincoln, Omaha, NE (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Nebraska-Lincoln, Omaha, NE (United States)
An anomaly detection model for early damage detection for concrete structures undergoing alkali-silica reaction (ASR) is presented. It is difficult to detect ASR initiation and early damage without a reference expansion measurement. Coda waves, or the multiply scattered portion of ultrasonic waves, have been found to be indicative of small changes in complex material such as concrete. The relationship between concrete damage and relative velocity change and decorrelation of coda waves has been studied, but a generalized model which detects when damage occurs in a concrete structure is still lacking. The presented method uses features extracted from coda waves to detect early damage in concrete structures. The model uses unsupervised learning and only requires data from undamaged structures for training. During the training process, the reconstruction error of the training data is minimized. When the data collected from damaged concrete structures is used as an input of the model, it returns high reconstruction errors that indicate the occurrence of damage in the structures. The performance of the model is validated using experimental studies and has been shown to generalize across two different ASR specimens.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP)
- Grant/Contract Number:
- AC05-00OR22725; NE0008544
- OSTI ID:
- 1864407
- Journal Information:
- IEEE Sensors Journal, Journal Name: IEEE Sensors Journal Journal Issue: 6 Vol. 22; ISSN 1530-437X
- Publisher:
- IEEECopyright Statement
- Country of Publication:
- United States
- Language:
- English
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