Application of stress based NDT methods for concrete repair bond quality control

Garbacz, Andrzej

doi:10.1515/bpasts-2015-0009

Cited by 13 publications

(10 citation statements)

References 24 publications

(27 reference statements)

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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: 99%

“…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. The advantage of wave propagation-based methods is that they may be used in automatic structural health monitoring (SHM) systems.…”

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: 99%

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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“…Although the sand patch test [14,25] and the profilometric method [44,65] are still popular for evaluating the surface morphology of concrete, Tayeh et al [30], Siewczyńska [66], Hoła et al [67] and Sadowski et al [68] successfully used the 3D laser scanning method to evaluate the interphase zone between the overlay and concrete substrate. At the meso level, NDT involved the analysis of acoustic descriptors obtained with the use of the impact-echo method [69,70], the ultrasonic echo method [71,72], the ultrasonic pulse velocity method [73] and the acoustic emission method [74]. In literature, the infrared thermography method has been also used for the evaluation of the bond between overlay and concrete substrate [75].…”

Section: Literature Reviewmentioning

confidence: 99%

Multi-Scale Evaluation of the Interphase Zone between the Overlay and Concrete Substrate: Methods and Descriptors

Sadowski

2017

Applied Sciences

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This article presents the problem of examining the interphase zone between the overlay and concrete substrate at different levels of observation. The possibility of applying available modern research methods in order to examine the interphase zone with regard to the level of observation is presented. These levels were defined in the paper. Examples of tests that show a possible approach to the examination of the interphase zone are also presented.

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“…In 2015, a special issue of the Bulletin of the Polish Academy of Sciences: Technical Sciences dedicated to diagnosis and durability of buildings was published [13]. Studies published in that issue: K. Flaga [14]; Z. Owsiak et al [15,16]; Z. Rusin et al [17]; L. Czarnecki, P. Woyciechowski [18]; B. Goszczyńska et al [19]; K. Wilde et al [20]; A. Garbacz [21]; Z. Hoła [22]; M. Iwański [23]; A. Szydło [24]; A. Piekarczuk et al [25]; M. Kolbrecki [26]; D. Kowalski et al [27] are considerable evidence of achievements and research ambitions in this area.…”

Section: Czarnecki and D Van Gemert Scientific Basis And Rules Ofmentioning

confidence: 99%

Scientific basis and rules of thumb in civil engineering: conflict or harmony?

Czarnecki

Gemert

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Science and engineering intermingle in the area of construction. Engineering works, often of great dimensions and design life cycle of many decades, have to be designed on a scientific basis since the safety of hundreds of users depends on their design. The task of scientific institutions is to define the construction performance within categories that correspond to the contemporary level of knowledge and technology. A construction appraiser who speaks out in a way that ensures unquestionable competence about the performance of elements and buildings (existing and under construction), should be convinced of the scientific basis of his opinions. A comparison of construction sections vs. basic requirements presents an archetype of the science of construction. A matrix of the science of construction reveals its multi-faceted nature; if related to time -the issue of durability has to be considered, and if related to the scale -the complexity. Defining the construction performance in terms of technical features is a constant search for a relationship between the material model and the usability model of a building. The construction industry uses a lot of "rules of thumb", more than any other sector of technology. In the era of computer-aided design, CAD, and building information modelling (BIM), those rules of thumb remain invaluable verification tools.Key words: building performance, appraiser, matrix of the science of construction, rules of thumb, durability, complexity, diversified development. Scientific basis and rules of thumb in civil engineering Defining building performanceThe primary task of universities and research institutes in the scientific discipline of construction is to continuously define building performance in a manner consistent with the current level of knowledge and technology. This means permanently seeking true solutions [2] -the relationship between the two corresponding models [3]: the material model (material model is used here to represent materials, analyses and geometries) and the usability model, which combines properties and requirements (Fig. 1).

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Application of stress based NDT methods for concrete repair bond quality control

Cited by 13 publications

References 24 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

Multi-Scale Evaluation of the Interphase Zone between the Overlay and Concrete Substrate: Methods and Descriptors

Scientific basis and rules of thumb in civil engineering: conflict or harmony?

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