caa a22 4500 463247825 CHVBK 20180405153331.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10086-006-0881-5 doi (NATIONALLICENCE)springer-10.1007/s10086-006-0881-5 Application of modal-based damage-detection method to locate and evaluate damage in timber beams [Elektronische Daten] [Fook Choi, Jianchun Li, Bijan Samali, Keith Crews] Modal-based damage-detection algorithms were used to identify the location of defects commonly found in timber and to estimate their severities. In this study, the authors propose modifications to an existing damage-detection algorithm for locating and evaluating damage by comparing the modal strain energy before and after damage using the first two flexural modes of vibration. Experimental verification was performed on pin-pin supported timber beams by employing the algorithms with extracted modal parameters using experimental modal analysis. Single and multiple cases of damage used to simulate pocket(s) of rot with various severities were inflicted by removing sections of timber beam specimens. The proposed damage indicator, computed from the first two flexural modes, was capable of detecting all damage locations. It was also able to estimate, with reasonable accuracy, the severity of damage in term of loss of sectional moment of inertia. The modified damage index method is generally reliable in detecting the location and estimating the severity of simulated defects in timber beams. The Japan Wood Research Society, 2007 Damage localization nationallicence Severity estimation nationallicence Timber nationallicence Experimental modal analysis nationallicence Modified damage index nationallicence Choi Fook Center for Built Infrastructure Research, Faculty of Engineering, University of Technology Sydney, PO Box 123 Broadway, 2007, NSW, Australia aut Li Jianchun Center for Built Infrastructure Research, Faculty of Engineering, University of Technology Sydney, PO Box 123 Broadway, 2007, NSW, Australia aut Samali Bijan Center for Built Infrastructure Research, Faculty of Engineering, University of Technology Sydney, PO Box 123 Broadway, 2007, NSW, Australia aut Crews Keith Center for Built Infrastructure Research, Faculty of Engineering, University of Technology Sydney, PO Box 123 Broadway, 2007, NSW, Australia aut Journal of Wood Science Springer-Verlag 53/5(2007-10-01), 394-400 1435-0211 53:5<394 2007 53 10086 https://doi.org/10.1007/s10086-006-0881-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10086-006-0881-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Choi Fook Center for Built Infrastructure Research, Faculty of Engineering, University of Technology Sydney, PO Box 123 Broadway, 2007, NSW, Australia aut NATIONALLICENCE 700 1- Li Jianchun Center for Built Infrastructure Research, Faculty of Engineering, University of Technology Sydney, PO Box 123 Broadway, 2007, NSW, Australia aut NATIONALLICENCE 700 1- Samali Bijan Center for Built Infrastructure Research, Faculty of Engineering, University of Technology Sydney, PO Box 123 Broadway, 2007, NSW, Australia aut NATIONALLICENCE 700 1- Crews Keith Center for Built Infrastructure Research, Faculty of Engineering, University of Technology Sydney, PO Box 123 Broadway, 2007, NSW, Australia aut NATIONALLICENCE 773 0- Journal of Wood Science Springer-Verlag 53/5(2007-10-01), 394-400 1435-0211 53:5<394 2007 53 10086 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer