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- W3000395058 abstract "Delamination is a serious form of deterioration in concrete bridge decks. Infrared thermography (IRT) is an advance non-destructive testing method for concrete bridge deck delamination detection by capturing the absolute thermal contrast (ΔT) on the concrete surface caused by the disruption in heat flow due to subsurface defects. However, as the ambient environmental conditions (e.g. wind velocity and solar radiation) of a bridge could significantly affect the measurement outcomes of IRT, the optimal times for infrared data collection are still unclear. In this paper, a series of experimental and numerical studies were carried out to investigate the effects of the rate of heat flux and wind velocity on ΔT on the surface of bridge decks with the aim of identifying the optimal inspection times for different geometry characteristics of delamination (i.e. size and depth). The developed model is firstly validated by the experimental data and then a series of parametric studies were carried out. The result shows that the heat flux rate plays an important role in the development of ΔT on concrete surface, especially for a relatively shallow and small size delamination. However, the influence of heat flux rate gradually diminishes with the increase in size and depth of delamination. In addition, it demonstrates that there is a positive linear correlation between the total heat energy (external irradiation) and square of the delamination depth. The current research represents an important step towards the development of an effective and efficient way for defect detection using IRT." @default.
- W3000395058 created "2020-01-23" @default.
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- W3000395058 date "2020-01-17" @default.
- W3000395058 modified "2023-10-16" @default.
- W3000395058 title "The influence of ambient environmental conditions in detecting bridge concrete deck delamination using infrared thermography (IRT)" @default.
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- W3000395058 doi "https://doi.org/10.1002/stc.2506" @default.
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