Corrosiveness mapping of bridge decks using image-based analysis of GPR data

Mona Abouhamad, Thikra Dawood, Ahmad Jabri, Mohammed Alsharqawi, Tarek Zayed

Research output: Journal article publicationReview articleAcademic researchpeer-review

20 Citations (Scopus)

Abstract

Ground Penetrating Radar (GPR), a locating instrument by design, has attracted much interest as a non-destructive inspection technique for bridge decks due to its ease of use and ability to detect corrosion. The most commonly used technique to interpret GPR data is numerical analysis. The assessment method relies on the fact that corroded reinforcing bars, which cause signal attenuation, can be easily identified using GPR scans. However, several other unrelated factors can attenuate GPR signals such as reinforcing bar depth, surface anomalies and reinforcing bar spacing. These anomalies can be falsely interpreted as deterioration using numerical analysis. Image-based analysis overcomes these drawbacks through analyzing the entire GPR profile while considering prior knowledge of the structure characteristics, thus determining the state of bridge deck. The main objective of this research is to develop a systematic framework of the image-based analysis. The framework is supported by various GPR profiles depicting several causes of signal attenuation and their analysis with respect to deterioration or rebar corrosion status. Two case studies are presented and analyzed using numerical analysis, image-based analysis, and other Non-Destructive Evaluation (NDE) techniques. The results are compared to confirm the validity of the proposed methodology. Further validation is done using concrete cores. The developed approach is believed to assist transportation agencies in a more informed decision making process through highlighting areas of actual deterioration.
Original languageEnglish
Pages (from-to)104-117
Number of pages14
JournalAutomation in Construction
Volume80
DOIs
Publication statusPublished - 1 Aug 2017
Externally publishedYes

Keywords

  • Bridge inspection
  • Concrete bridge decks
  • Corrosiveness mapping
  • Ground Penetrating Radar (GPR)
  • Non-Destructive Evaluation (NDE)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Civil and Structural Engineering
  • Building and Construction

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