A Crack Identification Method for Concrete Structures Using Improved U-Net Convolutional Neural Networks

Qiao Wenting; Zhang Hongwei; Zhu FeiWu Qiande

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A Crack Identification Method for Concrete Structures Using Improved U-Net Convolutional Neural Networks

机译：A Crack Identification Method for Concrete Structures Using Improved U-Net Convolutional Neural Networks

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摘要

The traditional method for detecting cracks in concrete bridges has the disadvantages of low accuracy and weak robustness. Combined with the crack digital image data obtained from bending test of reinforced concrete beams, a crack identification method for concrete structures based on improved U-net convolutional neural networks is proposed to improve the accuracy of crack identification in this article. Firstly, a bending test of concrete beams is conducted to collect crack images. Secondly, datasets of crack images are obtained using the data augmentation technology. Selected cracks are marked. Thirdly, based on the U-net neural networks, an improved inception module and an Atrous Spatial Pyramid Pooling module are added in the improved U-net model. Finally, the widths of cracks are identified using the concrete crack binary images obtained from the improved U-net model. The average precision of the test set of the proposed model is 11.7% higher than that of the U-net neural network segmentation model. The average relative error of the crack width of the proposed model is 13.2%, which is 18.6% less than that measured by using the ACTIS system. The results indicate that the proposed method is accurate, robust, and suitable for crack identification in concrete structures.

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《Mathematical Problems in Engineering: Theory, Methods and Applications》 |2021年第18期|6654996.1-6654996.16|共16页
作者
Qiao Wenting; Zhang Hongwei; Zhu FeiWu Qiande;
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作者单位

Changan Univ, Sch Highway, Xian 710064, Shanxi, Peoples R China|Inner Mongolia Transport Construct Engn Qual Supe, Hohhot 010051, Inner Mongolia, Peoples R China|Key Lab Transport Ind Management Control & Cycle, Hohhot 010051, Peoples R China;

Inner Mongolia Transport Construct Engn Qual Supe, Hohhot 010051, Inner Mongolia, Peoples R China|Key Lab Transport Ind Management Control & Cycle, Hohhot 010051, Peoples R China;

4Jiangsu Fasten Mat Anal & Inspecting Co Ltd, Jiangyin 214400, Jiangsu, Peoples R ChinaSoutheast Univ, Sch Civil Engn, Nanjing 210000, Jiangsu, Peoples R China;

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A Crack Identification Method for Concrete Structures Using Improved U-Net Convolutional Neural Networks

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