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Source location of acoustic emission waves for structural health monitoring of bridges

Kaphle, Manindra R. & Tan, Andy (2009) Source location of acoustic emission waves for structural health monitoring of bridges. In Jaiswal, Sumeet & Wang, Liang (Eds.) Infrastructure Research Theme Postgraduate Student Conference 2009 : Rethinking Sustainable Development : Planning, Engineering, Design and Managing Urban Infrastructure, 26 March 2009, QUT, Brisbane.

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Abstract

The process of structural health monitoring (SHM) involves monitoring a structure over a period of time using appropriate sensors, extracting damage sensitive features from the measurements made by the sensors and analysing these features to determine the current state of the structure. Various techniques are available for structural health monitoring of structures and acoustic emission (AE) is one technique that is finding an increasing use. Acoustic emission waves are the stress waves generated by the mechanical deformation of materials. AE waves produced inside a structure can be recorded by means of sensors attached on the surface. Analysis of these recorded signals can locate and assess the extent of damage.

This paper describes preliminary studies on the application of AE technique for health monitoring of bridge structures. Crack initiation or structural damage will result in wave propagation in solid and this can take place in various forms. Propagation of these waves is likely to be affected by the dimensions, surface properties and shape of the specimen. This, in turn, will affect source localization. Various laboratory test results will be presented on source localization, using pencil lead break tests. The results from the tests can be expected to aid in enhancement of knowledge of acoustic emission process and development of effective bridge structure diagnostics system.

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ID Code: 27849
Item Type: Conference Paper
Keywords: Structural health monitoring, , Acoustic emission,, Source localisation, , Time of arrival (TOA) method
ISBN: 9781741072709
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2009 please consult the authors
Deposited On: 09 Oct 2009 15:52
Last Modified: 03 Apr 2013 11:03

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