WIT Press


PRELIMINARY HAZARD ANALYSIS FOR UAV-ASSISTED BRIDGE INSPECTION

Price

Free (open access)

Volume

200

Pages

14

Page Range

171 - 184

Published

2020

Paper DOI

10.2495/UT200141

Copyright

Author(s)

YONAS Z. AYELE, BEHROOZ ASHRAF

Abstract

Unmanned aerial vehicle (UAV) technology has found its way into a number of civilian applications in the last 20 years, predominantly due to lower costs and tangible scientific improvements. In its application to structural bridge inspection, UAVs provide two main functions. The first, being the most common, detects damage through visual sensors. The 2D imagery data can be used to quickly establish a basic knowledge of the structure’s condition and is usually the first port of call. The second reconstructs 3D models to provide a permanent record of geometry for each bridge asset, which could be used for navigation and control purposes. However, there are various problems associated with the use of UAVs for bridge inspection, in particular, in cold operating environments, such as Norway. This paper will integrate scenario prediction and assess hazards as well as the social and environmental loss in the case of UAV-assisted bridge inspection. Further, this paper will follow rather closely a three-phase process: hazard identification, hazard analysis, and hazard evaluation, all executed with qualitative data and methods by experts of a variety of fields, methodologies for recognition of the impact of cold operating environment on the performance of UAVs and UAV-pilots, creative interpretation of the hazard factors of identifiable problems, or even brainstorming about “imaging the unimaginable”.

Keywords

preliminary hazard analysis, UAV-assisted bridge inspection, risk assessment, drone inspection