Nondestructive integrity evaluation of PC pile using Wigner-Ville distribution method

Sheng Huoo Ni, Kuo Feng Lo, Yan Hong Huang

研究成果: Article同行評審

摘要

Nondestructive evaluation (NDE) techniques have been used for years to provide a quality control of the construction for both drilled shafts and driven concrete piles. This trace is typically made up of transient pulses reflected from structural features of the pile or changes in its surrounding environment. It is often analyzed in conjunction with the spectral response, mobility curve, arrival time, etc. The Wigner-Ville Distribution is a new numerical analysis tool for signal process technique in the time-frequency domain and it can offer assistance and enhance signal characteristics for better resolution both easily and quickly. In this study, five single pre-cast concrete piles have been tested and evaluated by both sonic echo method and Wigner-Ville distribution (WVD). Furthermore, two difficult problems in nondestructive evaluation problems are discussed and solved: the first one is with a pile with slight defect, whose necking area percentage is less than 10%, and the other is a pile with multiple defects. The results show that WVD can not only recognize the characteristics easily, but also locate the defects more clearly than the traditional pile integrity testing method.

原文English
頁(從 - 到)959-964
頁數6
期刊Modern Physics Letters B
22
發行號11
DOIs
出版狀態Published - 2008 5月 10

All Science Journal Classification (ASJC) codes

  • 統計與非線性物理學
  • 凝聚態物理學

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