Application of the modified damage index method to timber beams

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Show simple item record Choi, FC Li, J Samali, B Crews, K 2010-07-15T07:27:12Z 2008-04
dc.identifier.citation Engineering Structures, 2008, 30 (4), pp. 1124 - 1145
dc.identifier.issn 0141-0296
dc.identifier.other C1 en_US
dc.description.abstract In this paper the use of two existing algorithms developed for global nondestructive evaluation to locate and evaluate localised damage in timber beams is investigated using a finite element model. These damage localisation algorithms were found, through this investigation, not to be effective in locating multiple damage scenarios and unable to evaluate the severity of damage. Hence, modifications on damage index algorithms as well as a hybrid algorithm are proposed to overcome the problems. In this study, experimental modal analysis (EMA) was used as a tool to extract mode shapes for calculating the damage index in the proposed method which utilises changes in modal strain energy between the undamaged and the damaged timber beam model. The modified damage index (MDI) method normalises the mode shape curvature and the hybrid algorithm combines the modified damage index and changes in flexibility algorithms which reflect the changes of natural frequency and mode shape. Analytical evaluations were performed to compare and verify the ability of original and modified damage localisation algorithms in locating single and multiple damage in timber beams. The modified damage index (MDI) algorithm and the hybrid damage algorithm are also used in the experimental studies to validate the effectiveness of the methods to locate and evaluate damage within timber beams by laboratory experiments. © 2007 Elsevier Ltd. All rights reserved.
dc.language eng
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon 10.1016/j.engstruct.2007.07.014
dc.title Application of the modified damage index method to timber beams
dc.type Journal Article
dc.parent Engineering Structures
dc.journal.volume 4
dc.journal.volume 30
dc.journal.number 4 en_US
dc.publocation Kidlington, England en_US
dc.identifier.startpage 1124 en_US
dc.identifier.endpage 1145 en_US FEIT.School of Elec, Mech and Mechatronic Systems en_US
dc.conference Verified OK en_US
dc.for 0905 Civil Engineering
dc.personcode 930410
dc.personcode 930859
dc.personcode 044012
dc.personcode 870186
dc.percentage 100 en_US Civil Engineering en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords Damage localisation
dc.description.keywords Experimental modal analysis
dc.description.keywords Finite element method
dc.description.keywords Modified damage index
dc.description.keywords Severity estimation
dc.description.keywords Timber beam
pubs.embargo.period Not known
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 Elec, Mech and Mechatronic Systems
pubs.organisational-group /University of Technology Sydney/Strength - Built Infrastructure
utslib.copyright.status Open Access 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
utslib.collection.history General (ID: 2)

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