Data acquisition and processing parameters for concrete bridge deck condition assessment using ground-coupled ground penetrating radar: Some considerations

Varnavina, Aleksandra; Khamzin, Aleksey K.; Torgashov, Evgeniy; Sneed, Lesley; Goodwin, Brandon T.; Anderson, Neil Lennart

doi:10.1016/j.jappgeo.2015.01.011

Cited by 30 publications

(20 citation statements)

References 5 publications

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“…It is necessary to obtain the reliable relative permittivity values of materials in order to accurately assess the condition of the targets embedded in the media. Many researchers have successfully visualized the potential of chloride-induced deterioration (or other corrosive environments) in new and old concrete by measuring the energy attenuation of the reflected electromagnetic waves at the top of the reinforcing-bar (rebar) (Barnes et al 2008;Tarussov et al 2013;Hasan and Yazdani 2014;Varnavina et al 2015;Dinh et al 2016). The corrosive environments with higher moisture and chloride contents could be identified and differentiated because they were more highly attenuated than sound sections (Dinh et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Seasonal Variation and Age-related Changes in the Relative Permittivity of Concrete Bridge Decks on Korea Expressways

Rhee

Kee

Kim

et al. 2018

Int J Concr Struct Mater

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The purposes of this study were to investigate the seasonal variations in the relative permittivity of actual concrete bridge decks of various ages on Korea expressways, and to propose a practical way to calibrate two critical effects, to assess the condition of the concrete bridge decks with better accuracy. For these purposes, fifty-three actual concrete bridge decks on Korea expressways were scanned using an air-coupled ground penetrating radar (GPR) system, and the relative permittivity of the concrete was evaluated from the GPR data in the field. A statistical analysis showed that the relative permittivity of the concrete bridge decks in Korea are closely correlated with seasonal changes and concrete ages. For concrete bridge decks aged 10 years or older, the effect of concrete age was not as significant as that of relative humidity of the air on relative permittivity of concrete. Based on the results, a simple calibration process was proposed to suppress the effects of seasonal variation and age of concrete on the measured relative permittivity of the concrete decks on actual bridges. As will be discussed, the resulting relative permittivity method produced better agreement with the current condition of the concrete bridge decks as determined by visual inspection and other complementary methods (energy attenuation of GPR signals and corrosion potential measurements) than without the calibration process.

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Section: Introductionmentioning

confidence: 99%

Seasonal Variation and Age-related Changes in the Relative Permittivity of Concrete Bridge Decks on Korea Expressways

Rhee

Kee

Kim

et al. 2018

Int J Concr Struct Mater

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“…These limitations have motivated pursuing advanced NDE techniques for more reliable BCA. For example, probability of active corrosion can be evaluated by half-cell potential [63], electrical resistivity [64], and ground penetrating [65], while the corrosion rate can be identified by the polarization resistance method [66]. The presence of vertical cracks leads to a reduced modulus of elasticity of concrete, which can be captured using the ultrasonic surface wave method [67].…”

Section: Nde Techniques For Concrete Bridge Decksmentioning

confidence: 99%

Condition Assessment of Reinforced Concrete Bridges: Current Practice and Research Challenges

Touzani

Nehdi

2018

Infrastructures

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Abstract:One quarter of bridges in Canada and the United States need repair. The present study provides a critical overview of the state-of-the-art existing condition assessment techniques for reinforced concrete bridges, with an emphasis on current practice in North America. The techniques were classified into five categories, including visual inspection, load testing, non-destructive evaluation, structural health monitoring, and finite element modelling. The potential applications of these technologies are discussed and compared, highlighting their primary advantages and limitations. The review revealed that quantitative assessment could be effectively achieved using several complementary technologies. It is shown that there is need for concerted research efforts to achieve automated data collection and interpretation analyses. Also, the configuration of monitoring systems was found to be paramount in effectively assessing bridge performance parameters of interest. The study suggests appropriate investigation methods for some bridge deterioration mechanisms. Knowledge gaps and challenges in this field are outlined in order to motivate further research and development of these technologies.

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“…GPR is often used with an array of transducers that act in sending and receiving modes, giving GPR outputs high spatial resolution. This allows individual reinforcing members, void features, and concrete cover and slab depth to be identified [22][23][24][25].…”

Section: Ground Penetrating Radarmentioning

confidence: 99%

“…used a ground-coupled GPR antenna to investigate the condition of 11 bridges in Missouri, USA[24]. Varnavina et al reviewed several parameters of GPR testing including the number of samples per scan, the range of the travel time, and traverse spacing, among others[24]. These parameters were compared by imaging the internal state of the bridge decks[24].…”

mentioning

confidence: 99%

“…Varnavina et al reviewed several parameters of GPR testing including the number of samples per scan, the range of the travel time, and traverse spacing, among others[24]. These parameters were compared by imaging the internal state of the bridge decks[24]. It was found that a range of 15 ns was reasonable and would necessitate a minimum of 256 samples per scan for adequate resolution of the data[24].…”

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confidence: 99%

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Air-coupled impact-echo damage detection in reinforced concrete using wavelet transforms

Epp

Cha

2016

Smart Mater. Struct.

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Decline of the state of infrastructure in North America due to aging over the past decades has spawned burgeoning interest in the detection of internal damage of reinforced concrete (RC) structures via nondestructive testing. This study proposes a new impact-echo analysis method using wavelet transforms. The signals recorded from the microphones are analyzed using percentage of energy information to detect in-situ damages. Further, an artificial neural network (ANN) was used in order to test the feasibility of increasing the automaticity of the impact-echo method and a semi-autonomous sensing setup was used to the same end. The proposed wavelet transform-based approach showed improved accuracy when covering broader areas over conventional methods. The use of an ANN removed the need for a user-defined cutoff value for the classification of intact and damaged locations when a least-squared distance approach was used. It is postulated that this may contribute significantly to testing time reduction.

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Data acquisition and processing parameters for concrete bridge deck condition assessment using ground-coupled ground penetrating radar: Some considerations

Cited by 30 publications

References 5 publications

Seasonal Variation and Age-related Changes in the Relative Permittivity of Concrete Bridge Decks on Korea Expressways

Seasonal Variation and Age-related Changes in the Relative Permittivity of Concrete Bridge Decks on Korea Expressways

Condition Assessment of Reinforced Concrete Bridges: Current Practice and Research Challenges

Air-coupled impact-echo damage detection in reinforced concrete using wavelet transforms

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