Method for analyzing time-series GPR data of concrete bridge decks

Kien Dinh, Tarek Zayed, Francisco Romero, Alexander Tarussov

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

Abstract

Ground-penetrating radar (GPR) has been extensively studied in North America as a nondestructive evaluation (NDE) technology for inspection of concrete bridge decks. With current practices, however, GPR has only proven to be an indicator of potential damage. Basically, to obtain the condition map for a concrete bridge deck, one would try to analyze one-time GPR data based mostly on the relative difference between reflection amplitudes at the top rebar layer. With a hypothesis that time-series GPR data can provide better information on bridge deck deterioration progression, this study investigates and proposes a new method to interpret those time-series data sets. Based on a correlation coefficient between A-scans, the proposed methodology was implemented and validated for a bare concrete bridge deck in New Jersey. The map provided by the proposed method clearly shows deterioration progression between the two consecutive scans, whereas the traditional analysis technique using the top rebar amplitude suggests unreasonable improvement of the deck condition over time.
Original languageEnglish
Article number04014086
JournalJournal of Bridge Engineering
Volume20
Issue number6
DOIs
Publication statusPublished - 1 Jun 2015
Externally publishedYes

Keywords

  • Bridge inspection
  • Concrete bridge decks
  • Ground-penetrating radar (GPR)
  • Nondestructive testings

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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