Application of the Modified Damage Index method to timber beams

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dc.contributor.author Choi, Fook Choon en_US
dc.contributor.author Li, Jianchun en_US
dc.contributor.author Samali, Bijan en_US
dc.contributor.author Crews, Keith en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-07-15T07:27:12Z
dc.date.available 2010-07-15T07:27:12Z
dc.date.issued 2008 en_US
dc.identifier 2007001143 en_US
dc.identifier.citation Choi Fook Choon et al. 2008, 'Application of the Modified Damage Index method to timber beams', Elsevier Inc., vol. 30, no. 4, pp. 1124-1145. en_US
dc.identifier.issn 0141-0296 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/12795
dc.description.abstract en_US
dc.description.abstract 2007, Australia Received 31 August 2006; revised 16 July 2007; Accepted 16 July 2007. Available online 21 August 2007. 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. en_US
dc.language en_US
dc.publisher Elsevier Inc. en_US
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/j.engstruct.2007.07.014 en_US
dc.rights NOTICE: this is the author’s version of a work that was accepted for publication in Engineering Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in SEngineering Structures, Volume 30, Issue 4, April 2008, Pages 1124–1145 DOI: http://dx.doi.org/10.1016/j.engstruct.2007.07.014, en_US
dc.title Application of the Modified Damage Index method to timber beams en_US
dc.parent Engineering Structures en_US
dc.journal.volume 30 en_US
dc.journal.number 4 en_US
dc.publocation Kidlington, England en_US
dc.identifier.startpage 1124 en_US
dc.identifier.endpage 1145 en_US
dc.cauo.name FEIT.School of Elec, Mech and Mechatronic Systems en_US
dc.conference Verified OK en_US
dc.for 090500 en_US
dc.personcode 044012 en_US
dc.personcode 930859 en_US
dc.personcode 870186 en_US
dc.personcode 930410 en_US
dc.percentage 100 en_US
dc.classification.name Civil Engineering en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords en_US
dc.description.keywords Damage localisation; Severity estimation; Timber beam; Finite element method; Experimental modal analysis; Modified damage index en_US
dc.staffid 930410 en_US


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