Reliable onset time determination and source location of acoustic emissions in concrete structures

Acoustic emission (AE) technique, as an effective method to monitor the crack characterization in concrete materials is investigated in this paper. An improved approach, based on the Akaike Information Criterion (AIC), is proposed to provide more reliable onset time determination of AE signals. The...

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Bibliographic Details
Published in:Cement & concrete composites 2012-04, Vol.34 (4), p.529-537
Main Authors: Carpinteri, A., Xu, J., Lacidogna, G., Manuello, A.
Format: Article
Language:English
Subjects:
Acoustic emission
Akaike Information Criterion
Apparent velocity
Cements
Certainty degree
Concrete structures
Concretes
Crack location
Cracks
Flaw detection
Monitors
Onset time determination
Position (location)
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Summary:Acoustic emission (AE) technique, as an effective method to monitor the crack characterization in concrete materials is investigated in this paper. An improved approach, based on the Akaike Information Criterion (AIC), is proposed to provide more reliable onset time determination of AE signals. The introduced parameters, quantification of the certainty degree and the apparent velocity in the improved method can help to eliminate the false or doubtful picked onset results automatically. The improved AIC method is successfully applied to the AE detection during a three-point bending test of a fiber reinforced concrete beam to analyze the crack pattern. It is shown that the proposed method is a reliable tool for automatic onset time determination and useful for the crack source location in concrete structures.
ISSN:0958-9465
1873-393X
DOI:10.1016/j.cemconcomp.2011.11.013