Vision-based inspection of bolted joints: Field evaluation on a historical truss bridge in Vietnam

Thanh-Canh Huynh, Ba-Phu Nguyen, Ananta Man Singh Pradhan, Quang-Quang Pham
Author affiliations

Authors

  • Thanh-Canh Huynh Duy Tan University, Da Nang, Vietnam https://orcid.org/0000-0002-9231-2129
  • Ba-Phu Nguyen Department of Civil Engineering, Industrial University of Ho Chi Minh City, Vietnam
  • Ananta Man Singh Pradhan Water Resources Research and Development Centre, Ministry of Energy, Water Resources and Irrigation, Government of Nepal, Pulchowk, Lalitpur, Nepal
  • Quang-Quang Pham Bridge and Road Department, Da Nang Architecture University, Da Nang, Vietnam

DOI:

https://doi.org/10.15625/0866-7136/15073

Keywords:

bridge monitoring, vision-based inspection, bolted joint, loosened bolt detection, structural health monitoring, damage detection

Abstract

Vision-based inspection has received significant interests from structural health monitoring and maintenance academia. The vision-based approach has unique advantages over the traditional sensor-based inspection, including non-contact sensing, low cost, simple setup, and being immune to environmental effects. Despite that, the translation of the vision-based inspection to in-service structures in Viet Nam has been limited so far. Herein, the authors examine the field applicability of a vision-based approach for joints monitoring of a historical truss bridge in Vietnam. Firstly, a well-established vision-based bolt-loosening monitoring approach is briefly described. Secondly, a field test on the Nam O bridge (Da Nang City) is performed. A digital camera is used to capture the images of representative bolted joints of the bridge. Lastly, the vision-based approach is applied to monitor the bolted joints. The angle of bolts in the joints is estimated from the captured images, from which the accuracy of the approach is evaluated. This study is one of the first case applications, demonstrating the field applicability of the vision-based bolt-loosening approach for inspecting a real bridge in Vietnam.

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Published

31-03-2021

Issue

Vol. 43 No. 1 (2021)

Section

Research Article

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This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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