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Acoustic emission monitoring for assessment of steel bridge details

Kosnik, D.E. / Hopwood, T. / Corr, D.J.

By nature of the technique, acoustic emission testing is well suited to the problem of characterizing cracks in steel bridge details as actively growing or extinguished. The stress field in a steel bridge detail is often very complicated, containing highly localized stress concentrations. While other techniques, such as ultrasonic testing, require up-close access to the crack itself, AE testing can locate and characterize a crack within a more general area, making it a more forgiving method in terms of access and precision with which a crack must be located prior to testing. This should not be taken to mean that an entire bridge may be examined for cracks with only a few AE transducers-acoustic noise from riveted or bolted connections and wind-blown dust, plus electrical noise from long instrument cables make that impractical. Rather, AE is best used to monitor areas of a few tens of square feet in complex, high-stress regions such as connections.

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Acoustic emission monitoring for assessment of steel bridge details

Kosnik, D.E. / Hopwood, T. / Corr, D.J.

By nature of the technique, acoustic emission testing is well suited to the problem of characterizing cracks in steel bridge details as actively growing or extinguished. The stress field in a steel bridge detail is often very complicated, containing highly localized stress concentrations. While other techniques, such as ultrasonic testing, require up-close access to the crack itself, AE testing can locate and characterize a crack within a more general area, making it a more forgiving method in terms of access and precision with which a crack must be located prior to testing. This should not be taken to mean that an entire bridge may be examined for cracks with only a few AE transducers-acoustic noise from riveted or bolted connections and wind-blown dust, plus electrical noise from long instrument cables make that impractical. Rather, AE is best used to monitor areas of a few tens of square feet in complex, high-stress regions such as connections.

Acoustic emission monitoring for assessment of steel bridge details

Kosnik, D.E. / Hopwood, T. / Corr, D.J.

By nature of the technique, acoustic emission testing is well suited to the problem of characterizing cracks in steel bridge details as actively growing or extinguished. The stress field in a steel bridge detail is often very complicated, containing highly localized stress concentrations. While other techniques, such as ultrasonic testing, require up-close access to the crack itself, AE testing can locate and characterize a crack within a more general area, making it a more forgiving method in terms of access and precision with which a crack must be located prior to testing. This should not be taken to mean that an entire bridge may be examined for cracks with only a few AE transducers-acoustic noise from riveted or bolted connections and wind-blown dust, plus electrical noise from long instrument cables make that impractical. Rather, AE is best used to monitor areas of a few tens of square feet in complex, high-stress regions such as connections.

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Title:

Acoustic emission monitoring for assessment of steel bridge details

Additional title:

Schallemissionsprüfung zur Bewertung von Stahlbrückendetails

Contributors:

Kosnik, D.E. (author) / Hopwood, T. (author) / Corr, D.J. (author)

Published in:

QNDE, Review of Progress in Quantitative Nondestructive Evaluation, 37 ; 1410-1417

AIP Conference Proceedings ; 1335

Publication date:

2011

Size:

8 Seiten, 7 Bilder, 8 Quellen

ISBN:

978-0-7354-0888-3

ISSN:

DOI:

https://doi.org/10.1063/1.3592097

Type of media:

Conference paper

Type of material:

Storage medium

Language:

English

Keywords:

zerstörungsfreie Prüfung , Schallemissionsprüfung , Stahlbrücke , Beurteilung , Spannungskonzentration , Riss

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