Determination of the embedded lengths of electricity timber poles utilizing flexural wave generated from impacts

Subhani, M., Li, J., Samali, B. and Yan, N. 2013, Determination of the embedded lengths of electricity timber poles utilizing flexural wave generated from impacts, Australian journal of structural engineering, vol. 14, no. 1, pp. 85-96, doi: 10.7158/13287982.2013.11465124.

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Title Determination of the embedded lengths of electricity timber poles utilizing flexural wave generated from impacts
Author(s) Subhani, M.ORCID iD for Subhani, M.
Li, J.
Samali, B.
Yan, N.
Journal name Australian journal of structural engineering
Volume number 14
Issue number 1
Start page 85
End page 96
Total pages 12
Publisher Taylor & Francis
Place of publication Abingdon, Eng.
Publication date 2013
ISSN 1328-7982
Keyword(s) guided wave (GW)
non-destructive testing
short kernel method (SKM)
stress wave propagation
utility pole
wavelet transform (WT)
Summary Round timbers are extensively used as utility poles in Australia for electricity distribution and communication. Lack of information on their conditions results in great difficulties on asset management for industries. Despite the development of various non-destructive testing (NDT) techniques for evaluating the condition of piles, few NDTs are reported for applications on timber poles. This paper addresses challenges and issues on development of NDTs for condition assessment and embedded length of timber poles. For this paper, it is mainly focusing on determining the embedded length of the pole considering loss of the sufficient embedment length is a main factor compromising capacity and safety of timber poles. Since it is impractical for generating longitudinal waves by impacting from the top of poles, utilizing flexural wave from side impact on poles becomes attractive. However, the flexural wave is known by its highly dispersive nature. In this paper, one dimensional wave theory, guided wave theory and advanced signal processing techniques have been introduced in order to provide a solution for the problem. Two signal processing techniques, namely short kernel method and continuous wavelet transform, have been investigated for processing flexural wave signals to evaluate wave velocity and embedment length of timber poles in service.
Notes Reviewed and revised version of paper presented at the 3rd Annual Workshop for Australian Network of Structural Health Monitoring - 2 Dec. 2011, Geelong, Victoria.
Language eng
DOI 10.7158/13287982.2013.11465124
Field of Research 090505 Infrastructure Engineering and Asset Management
090506 Structural Engineering
Socio Economic Objective 870201 Civil Construction Design
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, Institution of Engineers Australia
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