A cost effective approach for integrity assessment of timber bridges

Li, J; Samali, B; Crews, K

A cost effective approach for integrity assessment of timber bridges

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. 1037 - 1042
Issue Date:: 2007-12-01

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Field	Value	Language
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. 1037 - 1042	en_US
dc.identifier.isbn	9780415426923	en_US
dc.identifier.uri	http://hdl.handle.net/10453/2054
dc.description.abstract	To develop a reliable and cost effective tool to assess the structural integrity of aged timber bridges is currently a challenge facing structural engineers. Whilst proof-load testing and Non-destructive Evaluation (NDE) techniques provide valuable assessment, such procedures are generally too complex, costly and time consuming to be applied across the entire inventory of timber bridges. A simple dynamic based testing method was developed by authors to lower the cost and shorten the testing time. The method has recently been used successfully to undertake field-testing of more than 180 timber bridges across NSW. This paper summarises the analytical development of this new approach together with some experimental examples. In the analytical studies, a closed form solution was obtained to provide an explicit relationship between the flexural stiffness and measured modal parameters. A beam with spring and masses attached was used to model a bridge with added mass or alternative added mass such as a trailer and/or a water tank for bridge testing. After obtaining the in-service stiffness of the tested bridge, a probabilistic modelling based on bending strength and gross stiffness (EI) of timber girders, is developed to provide an assessment of bridge load carrying capacity by using predicted in-service stiffness. Results of experimental studies and field testing using this approach are given in the references. © 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	A cost effective approach for integrity assessment of timber bridges	en_US
dc.type	Conference Proceeding
utslib.for	090506 Structural Engineering	en_US
dc.location.activity	Christchurch, New Zealand	en_US
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/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US

Abstract:

To develop a reliable and cost effective tool to assess the structural integrity of aged timber bridges is currently a challenge facing structural engineers. Whilst proof-load testing and Non-destructive Evaluation (NDE) techniques provide valuable assessment, such procedures are generally too complex, costly and time consuming to be applied across the entire inventory of timber bridges. A simple dynamic based testing method was developed by authors to lower the cost and shorten the testing time. The method has recently been used successfully to undertake field-testing of more than 180 timber bridges across NSW. This paper summarises the analytical development of this new approach together with some experimental examples. In the analytical studies, a closed form solution was obtained to provide an explicit relationship between the flexural stiffness and measured modal parameters. A beam with spring and masses attached was used to model a bridge with added mass or alternative added mass such as a trailer and/or a water tank for bridge testing. After obtaining the in-service stiffness of the tested bridge, a probabilistic modelling based on bending strength and gross stiffness (EI) of timber girders, is developed to provide an assessment of bridge load carrying capacity by using predicted in-service stiffness. Results of experimental studies and field testing using this approach are given in the references. © 2007 Taylor & Francis Group, London.

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http://hdl.handle.net/10453/2054