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The sensitivity of coda wave interferrometry in concrete structures in different scattering regimes

Fröjd, Patrik LU and Ulriksen, Peter LU (2016) European Workshop on Structural Health Monitoring, 2016 In 8th European Workshop on Structural Health Monitoring, EWSHM 2016 1. p.378-387
Abstract

Coda wave interferometry (CWI) has been demonstrated to be a very sensitive tool for detecting early signs of damage in concrete. The choice of frequency in SHM applications, utilizing coda waves, is not straight-forward, as there is a trade-off in sensitivity and possible propagation distances. This study aims to provide some steps in establishing recommendations as to choice of frequency, when designing CWI SHM systems, based on expected size of damage and size of the monitored structure. To this end codas with widely different central frequencies were used to detect boreholes at different relative locations in the concrete. The results suggest that, for damage which can be simulated by drilled holes on the scale of a few mm, signals... (More)

Coda wave interferometry (CWI) has been demonstrated to be a very sensitive tool for detecting early signs of damage in concrete. The choice of frequency in SHM applications, utilizing coda waves, is not straight-forward, as there is a trade-off in sensitivity and possible propagation distances. This study aims to provide some steps in establishing recommendations as to choice of frequency, when designing CWI SHM systems, based on expected size of damage and size of the monitored structure. To this end codas with widely different central frequencies were used to detect boreholes at different relative locations in the concrete. The results suggest that, for damage which can be simulated by drilled holes on the scale of a few mm, signals in the range of 50-150 kHz is suitable for SHM applications in large concrete structures.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Coda waves, CWI, Diffuse field, Structural health monitoring, Ultrasound
in
8th European Workshop on Structural Health Monitoring, EWSHM 2016
volume
1
pages
10 pages
publisher
NDT.net
conference name
European Workshop on Structural Health Monitoring, 2016
external identifiers
  • scopus:84994810326
ISBN
9781510827936
language
English
LU publication?
yes
id
1838bc4f-f614-4743-baf0-21f7c2029b7c
date added to LUP
2017-04-24 15:05:25
date last changed
2017-04-24 15:05:25
@inproceedings{1838bc4f-f614-4743-baf0-21f7c2029b7c,
  abstract     = {<p>Coda wave interferometry (CWI) has been demonstrated to be a very sensitive tool for detecting early signs of damage in concrete. The choice of frequency in SHM applications, utilizing coda waves, is not straight-forward, as there is a trade-off in sensitivity and possible propagation distances. This study aims to provide some steps in establishing recommendations as to choice of frequency, when designing CWI SHM systems, based on expected size of damage and size of the monitored structure. To this end codas with widely different central frequencies were used to detect boreholes at different relative locations in the concrete. The results suggest that, for damage which can be simulated by drilled holes on the scale of a few mm, signals in the range of 50-150 kHz is suitable for SHM applications in large concrete structures.</p>},
  author       = {Fröjd, Patrik and Ulriksen, Peter},
  booktitle    = {8th European Workshop on Structural Health Monitoring, EWSHM 2016},
  isbn         = {9781510827936},
  keyword      = {Coda waves,CWI,Diffuse field,Structural health monitoring,Ultrasound},
  language     = {eng},
  pages        = {378--387},
  publisher    = {NDT.net},
  title        = {The sensitivity of coda wave interferrometry in concrete structures in different scattering regimes},
  volume       = {1},
  year         = {2016},
}