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

In English

Författare

Summary, in English

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.

Avdelning/ar

Publiceringsår

2015

Språk

Engelska

Sidor

16-27

Publikation/Tidskrift/Serie

NDT & E International

Volym

69

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Geotechnical Engineering

Nyckelord

  • Concrete
  • Impact-Echo
  • P-wave velocity
  • Thickness
  • Near field effect

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0963-8695