Detectability of delamination in CFRP strengthened members by thermography

J. Gu, S. Unjoh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationBridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations - Proceedings of the 10th International Conference on Bridge Maintenaince, Safety and Management, IABMAS 2020
EditorsHiroshi Yokota, Dan M. Frangopol
PublisherCRC Press/Balkema
Pages3959-3964
Number of pages6
ISBN (Electronic)9780367232788
DOIs
Publication statusPublished - 2021
Event10th International Conference on Bridge Maintenaince, Safety and Management, IABMAS 2020 - Sapporo, Japan
Duration: 2021 Apr 112021 Apr 15

Publication series

NameBridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations - Proceedings of the 10th International Conference on Bridge Maintenaince, Safety and Management, IABMAS 2020

Conference

Conference10th International Conference on Bridge Maintenaince, Safety and Management, IABMAS 2020
Country/TerritoryJapan
CitySapporo
Period21/4/1121/4/15

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality

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