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Proceedings Paper

Nondestructive debonding detection of fiber reinforced plastics strengthened structure based on infrared thermal imaging with laser thermal excitation
Author(s): Ying Xu; Hoon Sohn
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Paper Abstract

The infrared thermal imaging detection technology is often utilized for the debonding detection of concrete reinforced by fiber reinforced plastics (FRP) sheets. However, the traditional heat source excitation infrared thermal imaging method is affected by factors such as short heating distance, low thermal sensitivity and high power consumption. In order to solve these problems, the debonding detection of FRP-reinforced concrete structures based on optical excitation line laser heat source infrared thermal imaging method was proposed to detect the debonding of FRP reinforced concrete. The surface local heat distribution anomalies caused by debonding in the structure could be measured by an infrared camera. Based on the numerical and experimental results, it is proved that the method has the advantages of debonding detection in FRP reinforcement structure: (1) the feasibility of using laser scanning thermal imaging technology to detect the debonding damage in FRP modified concrete structure; (2) FRP reinforcement long-distance, high thermal sensitivity and low power consumption damage detection of concrete structures.

Paper Details

Date Published: 4 May 2020
PDF: 17 pages
Proc. SPIE 11379, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2020, 1137914 (4 May 2020); doi: 10.1117/12.2552382
Show Author Affiliations
Ying Xu, Harbin Institute of Technology (China)
Hoon Sohn, KAIST (Korea, Republic of)

Published in SPIE Proceedings Vol. 11379:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2020
Haiying Huang, Editor(s)

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