Damage evaluation of a timber beam using a modal-based method

Choi, FC; Li, J; Samali, B; Crews, K

Damage evaluation of a timber beam using a modal-based method

Choi, FC Li, J

Samali, B

Crews, K

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Publication Type:: Conference Proceeding
Citation:: Progress in Mechanics of Structures and Materials - Proceedings of the 19th Australasian Conference on the Mechanics of Structures and Materials, ACMSM19, 2007, pp. 1005 - 1010
Issue Date:: 2007-12-01

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Field	Value	Language
dc.contributor.author	Choi, FC	en_US
dc.contributor.author	Li, J https://orcid.org/0000-0002-2526-3048	en_US
dc.contributor.author	Samali, B https://orcid.org/0000-0002-3426-7745	en_US
dc.contributor.author	Crews, K https://orcid.org/0000-0003-1450-1423	en_US
dc.date.issued	2007-12-01	en_US
dc.identifier.citation	Progress in Mechanics of Structures and Materials - Proceedings of the 19th Australasian Conference on the Mechanics of Structures and Materials, ACMSM19, 2007, pp. 1005 - 1010	en_US
dc.identifier.isbn	9780415426923	en_US
dc.identifier.uri	http://hdl.handle.net/10453/2025
dc.description.abstract	In Australia, many timber bridges are old and increasingly experience deterioration, aging and traffic overloading problems. These have attracted attention of researchers to evaluate the current state of such bridges. Whilst proof-load testing and traditional nondestructive evaluation (NDE) provide valuable tools, such procedures are often time consuming and costly. For bridge structures, to develop effective NDE at global level viz damage identification and structural health monitoring using modal-based damage identification methods have engrossed recent worldwide research efforts. However, to date there are few works reported on timber bridges using modal-based damage identification methods to evaluate their state of health. In this paper, modal-based damage identification methods for localization of damage in timber bridges are presented based on finite element analysis (FEA) and test results of a timber beam. Two algorithms of global NDE for identifying local damage and decay in timber structures are investigated. The methods employ modal parameters that monitor changes in modal strain energy (MSE) based on curvature mode shapes of a damaged beam with respect to the undamaged one. The aim of the study is to investigate the capability and limitations of the proposed algorithms for detecting damage with multiple damage scenarios in timber structures. Between the two proposed modal based damage identification algorithms, the modified method has shown better results in solving multiple damage problems. © 2007 Taylor & Francis Group, London.	en_US
dc.relation.ispartof	Progress in Mechanics of Structures and Materials - Proceedings of the 19th Australasian Conference on the Mechanics of Structures and Materials, ACMSM19	en_US
dc.title	Damage evaluation of a timber beam using a modal-based method	en_US
dc.type	Conference Proceeding
utslib.for	090506 Structural Engineering	en_US
dc.location.activity	Christchurch, New Zealand	en_US
dc.location.activity	UNSW
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US

Abstract:

In Australia, many timber bridges are old and increasingly experience deterioration, aging and traffic overloading problems. These have attracted attention of researchers to evaluate the current state of such bridges. Whilst proof-load testing and traditional nondestructive evaluation (NDE) provide valuable tools, such procedures are often time consuming and costly. For bridge structures, to develop effective NDE at global level viz damage identification and structural health monitoring using modal-based damage identification methods have engrossed recent worldwide research efforts. However, to date there are few works reported on timber bridges using modal-based damage identification methods to evaluate their state of health. In this paper, modal-based damage identification methods for localization of damage in timber bridges are presented based on finite element analysis (FEA) and test results of a timber beam. Two algorithms of global NDE for identifying local damage and decay in timber structures are investigated. The methods employ modal parameters that monitor changes in modal strain energy (MSE) based on curvature mode shapes of a damaged beam with respect to the undamaged one. The aim of the study is to investigate the capability and limitations of the proposed algorithms for detecting damage with multiple damage scenarios in timber structures. Between the two proposed modal based damage identification algorithms, the modified method has shown better results in solving multiple damage problems. © 2007 Taylor & Francis Group, London.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/2025