Determination of embedment depth of timber poles and piles using wavelet transform

Li, Jianchun, Subhani, Mahbube and Samali, Bijan 2012, Determination of embedment depth of timber poles and piles using wavelet transform, Advances in structural engineering, vol. 15, no. 5, pp. 759-770, doi: 10.1260/1369-4332.15.5.759.

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Title Determination of embedment depth of timber poles and piles using wavelet transform
Author(s) Li, Jianchun
Subhani, MahbubeORCID iD for Subhani, Mahbube
Samali, Bijan
Journal name Advances in structural engineering
Volume number 15
Issue number 5
Start page 759
End page 770
Total pages 12
Publisher Multi-Science Publishing Co. Ltd.
Place of publication Brentwood, Eng.
Publication date 2012-05
ISSN 1369-4332
Keyword(s) condition assessment
embedment depth
non-destructive tests (NDT)
timber poles
wave dispersion
wavelet transform (WT)
Summary This paper presents an investigation on the wave propagation in timber poles with Wavelet Transform (WT) analysis for identification of the condition and underground depth of embedded timber poles in service. Most of non-destructive testing (NDT) applications for timber poles using wave-based methods consider only single wave mode and no dispersion. However, for wave propagations in timber poles (damaged/undamaged), such simplification may not be correct, especially for broad band excitation using impulse impact. To investigate the problem, a 5m timber pole was investigated numerically and experimentally. A dispersion curve is generated from the numerical results to provide guidance on the velocity and wave mode selection. Continuous wavelet transform (CWT) is applied on the same signal to verify the presence of modes and to process data from experimental testing. The results are presented in both time domain and time-frequency domain for comparison. The results of the investigation showed that, wavelet transform analysis can be a reliable signal processing tool for NDT in terms of condition and embedment length determination.
Language eng
DOI 10.1260/1369-4332.15.5.759
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 ©2012, Multi-Science Publishing Co. Ltd.
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