Automatic detection of steel rebar in bridge decks from ground penetrating radar data

Xin, Ma; Líu, Hao; Wang, Ming L.; Birken, Ralf

doi:10.1016/j.jappgeo.2018.07.010

Cited by 18 publications

(9 citation statements)

References 32 publications

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“…When dealing with a GPR bridge inspection, a large amount of data are produced and extensive manual processing is required to extract useful information, in which the manual identification and localization of rebar is time-consuming and labor intensive. In such a context, some authors have developed algorithms for the automatic detection of rebar [157,173,174,[176][177][178][179][180][181][182] and cracks/delamination [165,177,178].…”

Section: Concrete Bridgesmentioning

confidence: 99%

A Review of GPR Application on Transport Infrastructures: Troubleshooting and Best Practices

2021

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The non-destructive testing and diagnosis of transport infrastructures is essential because of the need to protect these facilities for mobility, and for economic and social development. The effective and timely assessment of structural health conditions becomes crucial in order to assure the safety of the transportation system and time saver protocols, as well as to reduce excessive repair and maintenance costs. Ground penetrating radar (GPR) is one of the most recommended non-destructive methods for routine subsurface inspections. This paper focuses on the on-site use of GPR applied to transport infrastructures, namely pavements, railways, retaining walls, bridges and tunnels. The methodologies, advantages and disadvantages, along with up-to-date research results on GPR in infrastructure inspection are presented herein. Hence, through the review of the published literature, the potential of using GPR is demonstrated, while the main limitations of the method are discussed and some practical recommendations are made.

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Section: Concrete Bridgesmentioning

confidence: 99%

A Review of GPR Application on Transport Infrastructures: Troubleshooting and Best Practices

2021

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“…where ε R1 and ε R2 are relative dielectric constants of the upper and lower material [3]. The fact that steel is an almost perfect reflector [14] is used for locating reinforcement in concrete structures. The results of GPR survey are usually presented in form of the A-scan, B-scan or radargram, and C-scan [1].…”

Section: Gpr Setupmentioning

confidence: 99%

Primjena georadara u ocjeni stanja betonskih konstrukcija

Baričević¹,

Serdar²

2019

6th Symposium on Doctoral Studies in Civil Engineering

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Maintenance costs of concrete structures can be reduced by efficient and extensive condition assessment. Rapid technological development has allowed application of innovative methodologies for the inspection of structures, which has in turn increased precision and efficiency of inspection activities. Potential for using ground-penetrating radar in the assessment of concrete structures has been considered for a long time and, with the improvement of the analysis tools, its application has been constantly increasing. Ground-penetrating radar is a technique based on emission of electromagnetic waves into the material, and on analysis of reflected waves, resulting in information about location and properties of a particular object. GPR is used for assessing condition of concrete structures, i.e. for the localization of reinforcement, determination of concrete cover, and localization of delamination. Recent research has shown that GPR data could be used for assessing corrosion of reinforcement. Following literature results on GPR-based study of concrete condition, main principles of GPR use are outlined in the paper.

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“…Its disadvantages include a short range of measurements and some errors that are triggered by resolution, which are significant when the rebars are closely arranged (lap splices, bundles of rebars) [5,6]. The advantage of the radar method is the possibility of localising the reinforcement at great depths; and its disadvantages cover difficulties in measuring diameters measurements and some measurement errors of damp structures [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Despite the continuous development, electromagnetic and radar methods still have present limitations. Many papers in the literature [3,4,5,8] present advantages and possibilities for using electromagnetic and radar methods. Information regarding their limitations and measurement accuracy is rarely published.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Eddy-Current and Radar Methods Used in Reinforcement Detection

2019

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This article presents results from non-destructive testing (NDT) that referred to the location and diameter or rebars in beam and slab members. The aim of paper was to demonstrate that the accuracy and deviations of the NDT methods could be higher than the allowable execution or standard deviations. Tests were conducted on autoclaved aerated concrete beam and nine specimens that were specially prepared from lightweight concrete. The most advanced instruments that were available on the market were used to perform tests. They included two electromagnetic scanners and one ground penetrating radar (GPR). The testing equipment was used to analyse how the rebar (cover) location affected the detection of their diameters and how their mutual spacing influenced the detected quantity of rebars. The considerations included the impact of rebar depth on cover measurements and the spread of obtained results. Tests indicated that the measurement error was clearly greater when the rebars were located at very low or high depths. It could lead to the improper interpretation of test results, and consequently to the incorrect estimation of the structure safety based on the design resistance analysis. Electromagnetic and radar devices were unreliable while detecting the reinforcement of small (8 and 10 mm) diameters at close spacing (up to 20 mm) and of large (20 mm) diameters at a close spacing and greater depths. Recommendations for practical applications were developed to facilitate the evaluation of a structure.

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Automatic detection of steel rebar in bridge decks from ground penetrating radar data

Cited by 18 publications

References 32 publications

A Review of GPR Application on Transport Infrastructures: Troubleshooting and Best Practices

A Review of GPR Application on Transport Infrastructures: Troubleshooting and Best Practices

Primjena georadara u ocjeni stanja betonskih konstrukcija

Accuracy of Eddy-Current and Radar Methods Used in Reinforcement Detection

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