Ground penetrating radar-based deterioration assessment of RC bridge decks

Mohammed Alsharqawi, Tarek Zayed, Ahmad Shami

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Purpose: Although ground penetrating radar (GPR) technology is commonly used to assess the condition of reinforced-concrete (RC) bridge decks, the GPR data interpretation is not straightforward. Further, the thresholds that define the severity of deterioration are selected arbitrarily. This paper aims to solve a problem associated with GPR results generated by using a numerical amplitude method to assess corrosiveness of bridge decks. Design/methodology/approach: Data, for more than 50 different bridge decks, were collected using a ground-coupled antenna. Depth-correction was performed for the collected data to normalize the reflected amplitude. Using k-means clustering technique, the amplitude values of each bridge deck were classified into four categories. Later, statistical analysis was performed where the threshold values of different categories of corrosion and deterioration are chosen. Monte-Carlo simulation technique was used to validate the value of these thresholds. Moreover, a sensitivity analysis was performed to realize the effect of changing the thresholds in the areas of corrosion. Findings: The final result of this research is a four-category (good, fair, poor and critical) GPR scale with three fixed numerical thresholds (−7.71 dB, −10.04 dB and −14.63 dB) that define these categories. Besides, deterioration curves have been modeled using Weibull function and based on GPR outputs and corrosion areas. Originality/value: The developed numerical GPR-based scale and deterioration models are expected to help the decision-makers in assessing the corrosiveness of bridge decks accurately and objectively. Hence, they will be able to take the right intervention decision for managing these decks.

Original languageEnglish
Pages (from-to)1-17
Number of pages17
JournalConstruction Innovation
Volume20
Issue number1
DOIs
Publication statusPublished - 6 Jan 2020

Keywords

  • Bridge decks deterioration assessment
  • Computational and numerical techniques
  • Corrosiveness scale
  • Deterioration modeling
  • Ground penetrating radar
  • Infrastructure
  • Innovation
  • Maintenance
  • Management
  • Statistics

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science(all)
  • Civil and Structural Engineering
  • Architecture
  • Building and Construction

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