Dynamic Boundary Element Method Analysis for Determining Correction Factor in Impact Echo
The impact echo method is a nondestructive testing method that is based on the use of elastic waves. It has been widely used in the nondestructive evaluation of concrete. With the identification of the peak frequency observed in the frequency spectrum, the depth of a reflector can be estimated when the longitudinal wave velocity is known. However, in most applications, an empirical correction factor (β) is used because the frequency observed in the spectrum is not in good agreement with the frequency calculated by the given equation in the impact echo. This paper presents determination of the empirical shape factor, β, in impact echo for different rectangular shapes. Two-dimensional dynamic boundary element analysis was conducted as a frequency sweep to simulate the impact test. The deformation modes of the first-mode resonance were examined for each shape by applying boundary element method analysis.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/9780309113151
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Authors:
- Alver, Ninel
- Ohtsu, Masayasu
- Publication Date: 2008
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 122-126
- Monograph Title: Structures 2008
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Issue Number: 2050
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Boundary element method; Concrete structures; Nondestructive tests
- Candidate Terms: Impact echo tests
- Uncontrolled Terms: Empirical correction factor; Rectangular structures
- Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 01111760
- Record Type: Publication
- ISBN: 9780309113151
- Files: TRIS, TRB
- Created Date: Sep 30 2008 9:39AM