Systematic errors in Impact-Echo thickness estimation due to near field effects

Oskar Tofeldt; Nils Rydén

doi:10.1016/j.ndteint.2014.09.003

Systematic errors in Impact-Echo thickness estimation due to near field effects

Oskar Tofeldt, Nils Rydén

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Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

Sammanfattning

Near field effects are found to create systematic errors, within the range of about 5-15%, in thickness estimations from Impact-Echo (IE) testing. This paper studies near field effects from a point source in a combined Multichannel Analysis of Surface Waves (MASW) and Impact-Echo analysis. The near field creates deviations in the measured velocity of the P-wave and the Rayleigh-wave, which lead to an underestimated thickness. This systematic error is identified in both a numerical and a real field case. The results are also compared with the conventional Impact-Echo method. (C) 2014 The Authors. Published by Elsevier Ltd.

Originalspråk	engelska
Sidor (från-till)	16-27
Tidskrift	NDT & E International
Volym	69
DOI	https://doi.org/10.1016/j.ndteint.2014.09.003
Status	Published - 2015

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Geoteknik och teknisk geologi

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10.1016/j.ndteint.2014.09.003

1 Doktorsavhandling (sammanläggning)

Lamb wave evaluation of concrete plates
Tofeldt, O., 2017 sep. 1, Department of Biomedical Engineering, Lund university. 144 s.
Forskningsoutput: Avhandling › Doktorsavhandling (sammanläggning)

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@article{47d79bba0a594d3dae46552596efc5e4,

title = "Systematic errors in Impact-Echo thickness estimation due to near field effects",

abstract = "Near field effects are found to create systematic errors, within the range of about 5-15%, in thickness estimations from Impact-Echo (IE) testing. This paper studies near field effects from a point source in a combined Multichannel Analysis of Surface Waves (MASW) and Impact-Echo analysis. The near field creates deviations in the measured velocity of the P-wave and the Rayleigh-wave, which lead to an underestimated thickness. This systematic error is identified in both a numerical and a real field case. The results are also compared with the conventional Impact-Echo method. (C) 2014 The Authors. Published by Elsevier Ltd.",

keywords = "Concrete, Impact-Echo, P-wave velocity, Thickness, Near field effect",

author = "Oskar Tofeldt and Nils Ryd{\'e}n",

year = "2015",

doi = "10.1016/j.ndteint.2014.09.003",

language = "English",

volume = "69",

pages = "16--27",

journal = "NDT & E International",

issn = "0963-8695",

publisher = "Elsevier",

}

TY - JOUR

T1 - Systematic errors in Impact-Echo thickness estimation due to near field effects

AU - Tofeldt, Oskar

AU - Rydén, Nils

PY - 2015

Y1 - 2015

N2 - Near field effects are found to create systematic errors, within the range of about 5-15%, in thickness estimations from Impact-Echo (IE) testing. This paper studies near field effects from a point source in a combined Multichannel Analysis of Surface Waves (MASW) and Impact-Echo analysis. The near field creates deviations in the measured velocity of the P-wave and the Rayleigh-wave, which lead to an underestimated thickness. This systematic error is identified in both a numerical and a real field case. The results are also compared with the conventional Impact-Echo method. (C) 2014 The Authors. Published by Elsevier Ltd.

AB - Near field effects are found to create systematic errors, within the range of about 5-15%, in thickness estimations from Impact-Echo (IE) testing. This paper studies near field effects from a point source in a combined Multichannel Analysis of Surface Waves (MASW) and Impact-Echo analysis. The near field creates deviations in the measured velocity of the P-wave and the Rayleigh-wave, which lead to an underestimated thickness. This systematic error is identified in both a numerical and a real field case. The results are also compared with the conventional Impact-Echo method. (C) 2014 The Authors. Published by Elsevier Ltd.

KW - Concrete

KW - Impact-Echo

KW - P-wave velocity

KW - Thickness

KW - Near field effect

U2 - 10.1016/j.ndteint.2014.09.003

DO - 10.1016/j.ndteint.2014.09.003

M3 - Article

SN - 0963-8695

VL - 69

SP - 16

EP - 27

JO - NDT & E International

JF - NDT & E International

ER -

Systematic errors in Impact-Echo thickness estimation due to near field effects

Sammanfattning

Ämnesklassifikation (UKÄ)

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Lamb wave evaluation of concrete plates

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