Defect detection of concrete structures using both infrared thermography and elastic waves

Ченг, Чиа-Чи; Cheng, Tao-Ming; Chiang, Chih‐Hung

doi:10.1016/j.autcon.2008.05.004

Cited by 115 publications

(71 citation statements)

References 7 publications

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“…8. It can be seen that the degradation has a strong influence on wave propagation signals, especially registered in the area after degradation zone (points of numbers 2,4,6,8,9), where the largest differences in amplitudes and time-of-flights can be observed. The snapshots of wave propagation patterns for reinforced concrete specimens with various damage scenarios are A novel formulation of 3D spectral element for wave propagation in reinforced concrete shown in Fig.…”

Section: Analysis Of Wave Propagation Resultsmentioning

confidence: 98%

“…Recently, various non-destructive testing (NDT) methods have been developed for evaluation of concrete structures, e.g. vibration-based methods [1], ground penetrating radar [2], acoustic emission [3], or infrared thermography [4]. Methods utilizing the phenomenon of wave propagation, including ultrasonic testing, the impact-echo method and the Lamb wave modes [5][6][7][8][9] are particularly interesting.…”

Section: Introductionmentioning

confidence: 99%

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A novel formulation of 3D spectral element for wave propagation in reinforced concrete

Rucka

Witkowski²,

Chróścielewski³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The paper deals with numerical simulations of wave propagation in reinforced concrete for damage detection purposes. A novel formulation of a 3D spectral element was proposed. The reinforcement modelled as the truss spectral element was embedded in the 3D solid spectral finite element. Numerical simulations have been conducted on cuboid concrete specimens reinforced with two steel bars. Different degradation models were considered to study the real behaviour of bended beams. In wave propagation modelling the spectral element method (SEM) plays an important role [16]. The SEM method is based on the high-order finite elements, usually of class C 0 . As a special feature, the elements have their nodes distributed both in physical space and in parent elements according to the Gauss-Lobatto-Legendre quadrature rule. As a consequence, it is possible to obtain a diagonal mass matrix at the element level which in turn, when appropriately taken into account, leads to fast and efficient time marching scheme. A multitude of aspects pertaining to SEM, especially for modelling of seismic waves (e.g. [17,18]) as well as for wave propagation for SHM purposes (e.g. [19]), have been already discussed. Spectral elements have been also developed for structural type finite elements like rods, beams or plates (e.g. [14,15,[20][21][22][23][24][25][26][27]), with the attention paid to theoretical aspects of wave propagation phenomena. In paper [28], 3-dimensional spectral elements have been presented, with application to damage detection in metal plate structures. Unbounded structures need a special treatment to preserve the dissipation of the energy in the infinite. The use of absorbing layers has been proposed in [29], on the example of a 1-dimensional rod and a 3-dimensional half-cylindrical shell. As far as damage detection is concerned, various techniques applied to simulation of damage effects have been considered. One can refer for instance to [20][21][22] where discontinuities in the form of cracks/caverns or point masses have been accounted for. A semi-analytical approach in analysis of flexural wave propagation through a slender beam, with a breathing edge-crack, is developed in [30]. In the context of non-homogenous material reference [31] discusses the use of the SEM with functionally graded material (FGM). To the authors' best knowledge, the problem of wave propagation in damaged reinforced concrete with the use of SEM has been not investigated.The present study focuses on development of a novel 3D spectral element for wave propagation in reinforced concrete subjected to mechanical degradation. Numerical simulations have been conducted on cuboid concrete specimens reinforced with two steel bars. Different degradation models were considered to reflect the real behaviour of bended beams described in [11].

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Section: Analysis Of Wave Propagation Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A novel formulation of 3D spectral element for wave propagation in reinforced concrete

Rucka

Witkowski²,

Chróścielewski³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…Using ordinary visible images (photos), various image processing techniques have been proposed and employed in detecting surface cracks of concrete walls [14,15], but they cannot identify internal defects. In this regard, infrared thermography [16] has been used recently to detect internal deterioration of concrete structures. This method uses thermal behavior of an object's surface for detecting deteriorated parts from temperature change in time and its spatial variation.…”

Section: Introductionmentioning

confidence: 99%

Basic Study on Detection of Deteriorated RC Structures Using Infrared Thermography Camera

Yamazaki¹,

Ueda²,

Liu³

2018

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Abstract. Infrastructures in the world get old in several decades of their service time. Falling-offs of parts of deteriorated structures were often reported and sometimes caused casualties in Japan and many other countries. When an earthquake occurs, in particular, deteriorated structures have higher possibility to be damaged or collapsed. Thus assessing the health condition of structures is one of the important topics in civil engineering. Considering a large number of structures that have been in service more than 40 years in Japan, efficient evaluation methods are requested. In this regard, non-destructive tests have high possibility to be applied to various structures without affecting their functions. Accordingly, this study focuses on the use of infrared thermography to detect internal deterioration of concrete structures. As a first step of investigation, thermography diagnosis, hammer sounding test and Schmidt rebound hammer test were carried out to detect internal deterioration of a concrete retaining wall located in the campus of Chiba University, Chiba, Japan, and the results were compared to evaluate the capability and accuracy of these diagnosis methods.

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“…Therefore, the long wave infrared camera is preferential for surface measurement [5]. Furthermore, IRT with a selective heating of the surface under investigation, permits to detect and to characterize the non-homogeneities in buildings structures in the near surface region up to a depth of about 10 cm [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Optical excitation techniques [1,[7][8][9], including pulsed and modulated thermography, are the most common excitation techniques used in thermography.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Effect of Defect Parameters on the Thermal Contrast Evolution during Flash Thermography by Finite Element Method

Yuan¹,

Wu²,

Tang³

et al. 2014

Journal of the Korean Society for Nondestructive Testing

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A 3D model based on the finite element method (FEM) was built to simulate the infrared thermography (IRT) inspection process. Thermal contrast is an important parameter in IRT and was proven to be a function of defect parameters. Parametric studies were conducted on internal defects with different depths, thicknesses, and orientations. Thermal contrast evolution profiles with respect to the time of the defect and host material were obtained through numerical simulation. The thermal contrast decreased with defect depth and slightly increased with defect thickness. Different orientations of thin defects were detected with IRT, but doing so for thick defects was difficult. These thermal contrast variations with the defect depth, thickness, and orientation can help in optimizing the experimental process and interpretation of data from IRT.

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Defect detection of concrete structures using both infrared thermography and elastic waves

Cited by 115 publications

References 7 publications

A novel formulation of 3D spectral element for wave propagation in reinforced concrete

A novel formulation of 3D spectral element for wave propagation in reinforced concrete

Basic Study on Detection of Deteriorated RC Structures Using Infrared Thermography Camera

Prediction of the Effect of Defect Parameters on the Thermal Contrast Evolution during Flash Thermography by Finite Element Method

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