TY - GEN
T1 - Detectability of delamination in CFRP strengthened members by thermography
AU - Gu, J.
AU - Unjoh, S.
N1 - Publisher Copyright:
© 2021 Taylor & Francis Group, London
PY - 2021
Y1 - 2021
N2 - This paper focuses on a non-destructive testing technique, infrared thermography, which is used to detect delaminations in concrete structures strengthened by CFRP jacketing. Four Specimens were designed and manufactured based on an existing bridge strengthened by CFRP jacketing. The conditions of the artificial delaminations in specimens, including size and depth, presence of surface cover mortar, and water content in the delamination void, were considered as test parameters. FEM simulations by using the Finite Element Model were also conducted and the limit of detectable delamination was discussed according to parametrical analysis. The results show that the existence of cover mortar, the size and depth of delamination have the most marked influence on the detectability, and the distinction of delamination was difficult when the delamination voids are fulfilled with water. The results of simulation and experiment show good agreements, and the lower limit of detectable size was presented.
AB - This paper focuses on a non-destructive testing technique, infrared thermography, which is used to detect delaminations in concrete structures strengthened by CFRP jacketing. Four Specimens were designed and manufactured based on an existing bridge strengthened by CFRP jacketing. The conditions of the artificial delaminations in specimens, including size and depth, presence of surface cover mortar, and water content in the delamination void, were considered as test parameters. FEM simulations by using the Finite Element Model were also conducted and the limit of detectable delamination was discussed according to parametrical analysis. The results show that the existence of cover mortar, the size and depth of delamination have the most marked influence on the detectability, and the distinction of delamination was difficult when the delamination voids are fulfilled with water. The results of simulation and experiment show good agreements, and the lower limit of detectable size was presented.
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U2 - 10.1201/9780429279119-542
DO - 10.1201/9780429279119-542
M3 - Conference contribution
AN - SCOPUS:85117564229
T3 - Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations - Proceedings of the 10th International Conference on Bridge Maintenaince, Safety and Management, IABMAS 2020
SP - 3959
EP - 3964
BT - Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations - Proceedings of the 10th International Conference on Bridge Maintenaince, Safety and Management, IABMAS 2020
A2 - Yokota, Hiroshi
A2 - Frangopol, Dan M.
PB - CRC Press/Balkema
T2 - 10th International Conference on Bridge Maintenaince, Safety and Management, IABMAS 2020
Y2 - 11 April 2021 through 15 April 2021
ER -