Application of sonic and radar tests on the piers and walls of the Cathedral of Noto

Binda, L.; Saisi, A.; Tiraboschi, Claudia; Valle, S.; Colla, Camilla; Forde, M. C.

doi:10.1016/s0950-0618(03)00056-4

Cited by 74 publications

(32 citation statements)

References 4 publications

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“…Typical velocities of EM pulses vary in different materials, which is reported in [13]. The reason for most important velocity changes depends on the presence of inhomogeneities in the medium and on the moisture content [14]. Therefore, once the wave velocity is calibrated for a specific medium, a depth scale can be calculated by the GPR.…”

Section: Basic Principles Of Gprmentioning

confidence: 99%

FDTD Based Numerical Framework for Ground Penetrating Radar Simulation

Howlader¹,

Sattar²

2015

PIER M

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Abstract-In this paper, a one-dimensional numerical framework based on Finite-Difference TimeDomain (FDTD) method is developed to model response behaviour of Ground penetrating radar (GPR). The effects of electrical properties such as dielectric constant, conductivity of the media have been evaluated. A Gaussian shaped pulse is used as source which propagates through the 1D array grid, and the pulse interactions at different media interfaces have been investigated. The objective of this paper is to assess the modelling criteria and success rate of detecting buried object using the framework. A real life application of GPR to detect a buried steel bar in one meter thick concrete block has been carried out, and the results present successful detection of the steel bar along with measured depth of the concrete cover. The developed framework could be implemented to model multi-layer dielectric blocks with detection capability of various buried objects.

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Section: Basic Principles Of Gprmentioning

confidence: 99%

FDTD Based Numerical Framework for Ground Penetrating Radar Simulation

Howlader¹,

Sattar²

2015

PIER M

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“…Tomography can be used generally to map voids, moisture content and embedded timber elements ( Binda et al ., 2003b ). Owing to the signifi cant time, hardware and software requirements necessary for acquisition, this technique, however, is used only in a given location of the body.…”

Section: Methods 2: Tomographymentioning

confidence: 99%

Practical implications of GPR investigation using 3D data reconstruction and transmission tomography

Topczewski¹,

Fernandes

Cruz³

et al. 2007

J Build Apprais

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Non-destructive investigation using ground penetrating radar is becoming more popular in the inspection of civil structures. Currently, traditional 2D imaging is used as a preliminary tool to fi nd possible areas of interest for more detailed inspection, which can be accomplished by more advanced techniques like 3D image reconstruction or tomography. In this paper, a general overview of the work done at University of Minho regarding these techniques is presented, together with their limitations and advantages over typical radargrams, with implications for civil engineering applications. For this purpose, data acquisition on two large masonry walls and one large concrete specimen have been carried out, using refl ection mode, 3D reconstruction and transmission tomography. The specimens have been specially built for non-destructive inspection techniques testing, incorporating different materials and internal voids. Radar tomography and 3D image reconstruction techniques provided much more detailed information about structural integrity and shapes and location of the voids, when compared to 2D imaging originally used for potential target identifi cation.

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“…Ultrasonic tomography for nondestructive tests and for characterization of artefacts has been applied in many case with good results [13][14][15][16][17]. In particular, 3D ultrasonic tomography has been recently used to study the structural continuity of the material [18][19][20].…”

Section: Ultrasonic Surveymentioning

confidence: 99%

From Geophysics to Microgeophysics for Engineering and Cultural Heritage

Cosentino

Capizzi

Martorana

et al. 2011

International Journal of Geophysics

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The methodologies of microgeophysics have been derived from the geophysical ones, for the sake of solving specific diagnostic and/or monitoring problems regarding civil engineering and cultural heritage studies. Generally, the investigations are carried out using different 2D and 3D tomographic approaches as well as different energy sources: sonic and ultrasonic waves, electromagnetic (inductive and impulsive) sources, electric potential fields, and infrared emission. Many efforts have been made to modify instruments and procedures in order to improve the resolution of the surveys as well as to significantly reduce the time of the measurements without any loss of information. This last point has been achieved by using multichannel systems. Finally, some applications are presented, and the results seem to be very promising and promote this new branch of geophysics. Therefore, these methodologies can be used even more to diagnose, monitor, and safeguard not only engineering buildings and/or large structures, but also ancient monuments and cultural artifacts, such as pottery, statues, and so forth.

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Application of sonic and radar tests on the piers and walls of the Cathedral of Noto

Cited by 74 publications

References 4 publications

FDTD Based Numerical Framework for Ground Penetrating Radar Simulation

FDTD Based Numerical Framework for Ground Penetrating Radar Simulation

Practical implications of GPR investigation using 3D data reconstruction and transmission tomography

From Geophysics to Microgeophysics for Engineering and Cultural Heritage

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