|Title:||Imaging of surface-breaking concrete cracks using transient elastic waves||Authors:||Liu, Pei-Ling
|Keywords:||Concrete; Surface-breaking crack; Transient waves||Issue Date:||1996||Journal Volume:||29||Journal Issue:||5||Start page/Pages:||323-331||Source:||NDT & E International||Abstract:||
This study develops an imaging method to determine the depth and inclination of a surface-breaking crack in a concrete structure. The migration method in reflection seismology is adopted to process the surface response of the concrete structure recorded in a transient elastic wave test. An image is constructed that shows the location of the crack tip. The response curves are processed further by the quadratic interpolation method to determine the location of the crack tip. Then, a solid line is superposed on the image to represent the crack. Numerical examples are presented to illustrate the effectiveness of the proposed method to display cracks of various dip angles and lengths. Two model tests verify that this method can detect real cracks successfully. Copyright © 1996 Elsevier Science Ltd.
|ISSN:||09638695||SDG/Keyword:||Acoustic signal processing; Concrete construction; Concrete testing; Cracks; Elastic waves; Imaging techniques; Interpolation; Seismology; Surface waves; Surfaces; Elastic wave test; Migration method; Quadratic interpolation; Reflection seismology; Surface breaking cracks; Transient waves; Nondestructive examination|
|Appears in Collections:||應用力學研究所|
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