A comparison of nondestructive evaluation methods for bridge deck assessment

Scott, Michael H.; Rezaizadeh, A; Delahaza, A; Santos, Carlos; Moore, Mark E.; Graybeal, Benjamin A.; Washer, Glenn

doi:10.1016/s0963-8695(02)00061-0

Cited by 121 publications

(55 citation statements)

References 2 publications

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“…However, if the position of these features are unknown, this becomes a difficult task. As has been seen in previous literature, GPR has been used to identify the position of these supports [8,42]. This paper illustrates, however, that the presence of moisture has a negative impact on the ability of GPR to accurately map the support.…”

Section: Discussionsupporting

confidence: 61%

“…A small impulse hammer strikes the surface of the sample and information is recorded in the location of the strike and on the reflected signal using an accelerometer placed 50-75 mm from the impact point. Fast Fourier transform (FFT) is applied to this information [8,9]. The impact echo technique is useful in measuring and detecting defects in plate-like structures such as bridge decks, slabs and walls and in bar-like structures such as circular, square and rectangular columns, as well as in the detection of defects in I-girders [10].…”

Section: Introductionmentioning

confidence: 99%

“…• The need to utilize split-spectrum processing with order statistic filter [7,8] in the GPR survey data.…”

Section: Introductionmentioning

confidence: 99%

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GPR Raw-Data Order Statistic Filtering and Split-Spectrum Processing to Detect Moisture

Kılıç

2014

Remote Sensing

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Considerable research into the area of bridge health monitoring has been undertaken; however, information is still lacking on the effects of certain defects, such as moisture ingress, on the results of ground penetrating radar (GPR) surveying. In this paper, this issue will be addressed by examining the results of a GPR bridge survey, specifically the effect of moisture in the predicted position of the rebars. It was found that moisture ingress alters the radargram to indicate distortion or skewing of the steel reinforcements, when in fact destructive testing was able to confirm that no such distortion or skewing had occurred. Additionally, split-spectrum processing with order statistic filters was utilized to detect moisture ingress from the GPR raw data.

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Section: Discussionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

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GPR Raw-Data Order Statistic Filtering and Split-Spectrum Processing to Detect Moisture

Kılıç

2014

Remote Sensing

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“…The waves reflected from internal changes in acoustic impedance or external boundaries and recorded on the surface, where the impact was generated, give information about the structure using signal interpretation techniques normally based on spectral analysis [10]. Testing with this method can be time consuming and only allows for one signal pair to be sent and received per scan.…”

Section: Elastic Wave-based Methodsmentioning

confidence: 99%

Quantitative ultrasonic evaluation of concrete structures using one-sided access

Khazanovich

Hoegh

2016

AIP Conference Proceedings

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Abstract. Nondestructive diagnostics of concrete structures is an important and challenging problem. A recent introduction of array ultrasonic dry point contact transducer systems offers opportunities for quantitative assessment of the subsurface condition of concrete structures, including detection of defects and inclusions. The methods described in this paper are developed for signal interpretation of shear wave impulse response time histories from multiple fixed distance transducer pairs in a self-contained ultrasonic linear array. This included generalizing Kirchoff migration-based synthetic aperture focusing technique (SAFT) reconstruction methods to handle the spatially diverse transducer pair locations, creating expanded virtual arrays with associated reconstruction methods, and creating automated reconstruction interpretation methods for reinforcement detection and stochastic flaw detection. Interpretation of the reconstruction techniques developed in this study were validated using the results of laboratory and field forensic studies. Applicability of the developed methods for solving practical engineering problems was demonstrated.

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“…Os ensaios não destrutivos fornecem informações relevantes do estado da estrutura (McCann e Forde, 2001), o que permite avaliar rapidamente e eficazmente os danos (Chang;Flatau;Liu, 2003) e dessa forma evitar o colapso prematuro e imprevisível (Rehman et al, 2016). Vários pesquisadores têm demostrado a aplicação destes métodos para a inspeção e a avaliação de estruturas, fornecendo orientações dos seus usos (Clark;McCann;Forde, 2003;Scott et al, 2003;Meola 2007). 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.…”

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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A comparison of nondestructive evaluation methods for bridge deck assessment

Cited by 121 publications

References 2 publications

GPR Raw-Data Order Statistic Filtering and Split-Spectrum Processing to Detect Moisture

GPR Raw-Data Order Statistic Filtering and Split-Spectrum Processing to Detect Moisture

Quantitative ultrasonic evaluation of concrete structures using one-sided access

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

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