Investigation of effective utilization of infrared thermography (IRT) through advanced finite element modeling

Hiasa, Shuhei; Birgül, Recep; Çatbaş, F. Necati

doi:10.1016/j.conbuildmat.2017.05.175

Cited by 53 publications

(66 citation statements)

References 33 publications

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“…In addition, the results in Figure b indicate that the thermal contrast resulting from a shallow delamination is generally higher than that of a deep delamination in heating phase, and the difference gradually decreases in cooling phase. The experimental observations are consistent with previous experimental studies …”

Section: Resultssupporting

confidence: 93%

“…The geometry of the modelled slab is same as that used in the experiment. The thermal properties of the materials used in this study are obtained from previous studies and summarised in Table . The convergence study shows that the free tetrahedral elements with an element size ranging from 0.002 to 0.0275 m can achieve a better outcome.…”

Section: Methodssupporting

confidence: 93%

“…The bridges are traditionally monitored for subsurface delamination using chain drag and hammer sounding tests carried out by trained inspectors and qualified engineers . These tests are based on the principle that the sound from dragging the chain or hitting the hammer on the deck changes from ringing (associated with sound deck) to the somewhat dull and hollow (associated with delamination) .…”

Section: Introductionmentioning

confidence: 99%

“…9 The bridges are traditionally monitored for subsurface delamination using chain drag and hammer sounding tests carried out by trained inspectors and qualified engineers. 10 These tests are based on the principle that the sound from dragging the chain or hitting the hammer on the deck changes from ringing (associated with sound deck) to the somewhat dull and hollow (associated with delamination). 11 Although these techniques are low cost, simple and easy to apply, they are time-consuming, and the accuracy of results is highly sensitive to the surrounding noises and require experience of inspectors.…”

Section: Introductionmentioning

confidence: 99%

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The influence of ambient environmental conditions in detecting bridge concrete deck delamination using infrared thermography (IRT)

Raja

Miramini

Duffield

et al. 2020

Struct Control Health Monit

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Summary 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.

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Section: Resultssupporting

confidence: 93%

Section: Methodssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of ambient environmental conditions in detecting bridge concrete deck delamination using infrared thermography (IRT)

Raja

Miramini

Duffield

et al. 2020

Struct Control Health Monit

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“…McCann e Forde (2001) apresentam uma variedade de métodos não destrutivos adequados para obras de construção civil, e, especificamente Rehman et al (2016), apresenta em detalhe os ensaios não destrutivos para a inspeção de pontes. A termografia infravermelha como um ensaio não destrutivo tem sido utilizada para a inspeção de estruturas civis com resultados satisfatórios (Meola, 2007;Fox;Goodhew;Wilde, 2016;Hiasa;, e a sua aplicação especifica na inspeção de pontes está cada vez mais consolidada (Watase et al, 2015;Ellenberg et al, 2016;Dabous et al, 2017;Hiasa;Catbas, 2017a). No entanto apresenta algumas limitações quanto: à profundidade de detecção de defeitos, a influência das condições ambientais, o horário de coleta de dados, entre outros.…”

Section: Introductionunclassified

A termografia infravermelha como um ensaio não destrutivo para a inspeção de pontes de concreto armado: Revisão do estado da arte

Rocha

Póvoas

2017

Revista de la Asociación Latinoamericana de Control de Calidad,

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RESUMOEste artigo tem como objetivo apresentar as metodologias, vantagens e limitações do ensaio da termografia infravermelha para a inspeção de pontes de concreto armado. Foi realizada uma revisão sistemática de artigos e de material acadêmico relativo à área. Esta revisão foca-se principalmente na aplicação passiva e em estudos tanto de laboratório quanto de campo. Utilizou-se uma abordagem crítica da informação disponível quanto a seu alcance. A termografia infravermelha apresenta-se como uma alternativa real para a detecção de defeitos nestas estruturas, sendo mais eficaz quanto mais superficiais sejam estas anomalias. Dependendo do trabalho a ser realizado é necessário levar em conta algumas considerações para obter melhores resultados. E é eficaz em combinação com outros ensaios. Palavras chaves: termografia infravermelha; inspeção de pontes; patologias do concreto. _______________________________________________________________

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Infrared thermography detection of delamination in bottom of concrete bridge decks

Raja

Miramini

Duffield

et al. 2021

Structural Contr & Hlth

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Infrared thermography (IRT) has been widely used in detecting the subsurface delamination of bridge deck. However, IRT inspection on delamination zones of the bridge deck which have limited exposure to direct solar radiation (e.g., the bottom surface of the bridge deck) is rather challenging due to the relatively low thermal contrast (ΔT) development in these zones. Therefore, the purpose of this study is to conduct a series of experimental studies in conjunction with numerical modeling for investigating the effectiveness of IRT in delamination detection of bridge deck components which are normally not exposed to direct solar radiation. Specially, the effects of different environmental conditions, thickness of bridge deck, and defect characteristics on the absolute thermal contrast (ΔT) development were systematically investigated. The results show that IRT can effectively detect the subsurface delamination of concrete bridge deck located in regions that are not exposed to the direct solar radiation. In addition, the development of detectable thermal contrast (>0.5 C) is much dependent on the rate of change in ambient temperature with a suitable detection period between 8 am and 4 pm. Furthermore, it shows that the value of ΔT increases with the increase of bridge deck thickness and delamination size.

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Investigation of effective utilization of infrared thermography (IRT) through advanced finite element modeling

Cited by 53 publications

References 33 publications

The influence of ambient environmental conditions in detecting bridge concrete deck delamination using infrared thermography (IRT)

The influence of ambient environmental conditions in detecting bridge concrete deck delamination using infrared thermography (IRT)

A termografia infravermelha como um ensaio não destrutivo para a inspeção de pontes de concreto armado: Revisão do estado da arte

Infrared thermography detection of delamination in bottom of concrete bridge decks

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