scholarly journals Clustering-Based Threshold Model for Condition Assessment of Concrete Bridge Decks Using Infrared Thermography

2017 ◽  
pp. 242-253
Author(s):  
Tarek Omar ◽  
Moncef L. Nehdi
Keyword(s):  
Infrared Thermography ◽  
Threshold Model ◽  
Bridge Decks ◽  
Condition Assessment ◽  
Concrete Bridge ◽  
Concrete Bridge Decks

Clustering-Based Threshold Model for Condition Assessment of Concrete Bridge Decks with Ground-Penetrating Radar

2015 ◽  
Vol 2522 (1) ◽  
pp. 81-89 ◽  
Author(s):  
Kien Dinh ◽  
Tarek Zayed ◽  
Sami Moufti ◽  
Ahmad Shami ◽  
Ahmad Jabri ◽  
...  
Keyword(s):  
North America ◽  
Ground Penetrating Radar ◽  
Threshold Model ◽  
Bridge Decks ◽  
Condition Assessment ◽  
Concrete Bridge ◽  
Cell Potential ◽  
Concrete Bridge Decks ◽  
Amplitude Data ◽  
Ground Penetrating

Ground-penetrating radar (GPR) has been extensively studied for condition assessment of concrete bridge decks in North America. Although several methods for analyzing GPR data have been proposed, the commonly accepted method evaluates the condition of concrete bridge decks on the basis of the difference between reflection amplitudes of the top rebar layer. It is assumed in the method that strong reflection indicates sound concrete, whereas the area with high-amplitude attenuation is associated with concrete corrosion. The final result is a contour map of reflection amplitude in decibel scale with the thresholds selected arbitrarily to define the severity of concrete deterioration. Because subjective determination of threshold values may lead to inconsistency in the result obtained, this paper proposes a robust method for resolving that issue. Specifically, after depth correction was performed for top rebar amplitudes, on the basis of K-means clustering technique these amplitude data were grouped into a number of condition categories. Through two case studies in North America, the methodology was implemented and compared with the results provided by other technologies, namely, concrete resistivity, half-cell potential, and laboratory chloride content analysis. The implementation showed that while the proposed method was simple to employ, it still provided reasonable results that were in line with the outputs provided by the other techniques.

Infrared thermography detection of delamination in bottom of concrete bridge decks

2021 ◽  
Author(s):  
Babar Nasim Khan Raja ◽  
Saeed Miramini ◽  
Colin Duffield ◽  
Massoud Sofi ◽  
Lihai Zhang
Keyword(s):  
Infrared Thermography ◽  
Bridge Decks ◽  
Concrete Bridge ◽  
Concrete Bridge Decks

Monitoring concrete bridge decks using infrared thermography with high speed vehicles

2016 ◽  
Vol 3 (3) ◽  
pp. 277-296 ◽  
Author(s):  
Shuhei Hiasa ◽  
F. Necati Catbas ◽  
Masato Matsumoto ◽  
Koji Mitani
Keyword(s):  
Infrared Thermography ◽  
High Speed ◽  
Bridge Decks ◽  
Concrete Bridge ◽  
Concrete Bridge Decks
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