Document Type
Article
Publication Date
12-1-2020
Publication Title
Construction and Building Materials
Volume
263
Abstract
Impact echo (IE) is a common nondestructive evaluation (NDE) method to detect subsurface defects in concrete bridge decks. The conventional approach for analyzing the IE data requires user expertise to define analysis parameters that could hinder broad field implementation. In this paper, the feasibility of using deep learning models for autonomous subsurface defect detection in bridge decks using IE has been investigated. A set of eight laboratory-made reinforced concrete bridge specimens with artificial defects were constructed at the Federal Highway Administration Advanced Sensing Technology NDE laboratory. A total number of 2016 of IE data was collected from these specimens. A one-dimensional (1D) convolutional neural network (CNN), and a 1D recurrent neural network using bidirectional long-short term memory units, were developed and applied on the IE data. In addition, two- dimensional (2D) CNNs world renowned architectures were applied on the 2D representatives of 2 the IE data, i.e., spectrograms. The proposed 1D CNN was the most accurate model achieving an overall accuracy of 0.88 by classifying 0.70 of the defects and 0.95 of the sound regions correctly. The proposed 1DCNN was superior to previous machine learning models that were previously used for IE classification. The results of this study showed the feasibility and the potentials of the DLMs for subsurface defect detection. Keywords: Deep learning, Impact Echo, Bridge Decks, Convolutional Neural Networks, Nondestructive Evaluation Methods, Bridge Inspection.
First Page
120109
DOI
10.1016/j.conbuildmat.2020.120109
ISSN
0950-0618
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Recommended Citation
Sattar Dorafshan and Hoda Azari. "Deep learning models for bridge deck evaluation using impact echo" (2020). Civil Engineering Faculty Publications. 23.
https://commons.und.edu/cie-fac/23
Comments
The Version of Record for this accepted manuscript has been published at:
Dorafshan, Sattar, and Hoda Azari. "Deep Learning Models for Bridge Deck Evaluation Using Impact Echo." Construction and Building Materials, vol. 263, 2020, article 120109, https://doi.org/10.1016/j.conbuildmat.2020.120109.