000012133 001__ 12133
000012133 005__ 20141205160022.0
000012133 04107 $$aeng
000012133 046__ $$k2008-10-12
000012133 100__ $$aXing, Shutao
000012133 24500 $$aAmbient Vibration Analysis of a Highway Bridge with Subspace Method and Frequency Domain Decomposition

000012133 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000012133 260__ $$b
000012133 506__ $$arestricted
000012133 520__ $$2eng$$aThis paper presents the structural identification of a highway bridge using the vibration measurements from existed structural seismic instrumentation that for long term monitoring of a highway bridge at Utah. As for the damage detection algorithms, one of the subspace identification methods, N4SID is used together with classical frequency domain decomposition method (FDD). These two approaches are found to be able to get frequencies quite satisfactorily. The influence of the temperature on the modal frequencies has been investigated with 13 months’ monitoring data. The results showed that daily fluctuations as well as seasonal fluctuations of frequencies can be identified by the methods utilized in this study. It can be seen that the extreme temperatures can cause the natural frequencies to shift. Computed through the identification algorithms of this paper, the distributions of the modes at different temperatures are presented.

000012133 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012133 653__ $$aHighway Bridge, Health Monitoring, Ambient Vibration, Subspace Identification, Frequencies Change

000012133 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000012133 720__ $$aXing, Shutao$$iHalling, Marvin W.$$iBarr, Paul J.$$iMeng, Qingli
000012133 8560_ $$ffischerc@itam.cas.cz
000012133 8564_ $$s757453$$uhttps://invenio.itam.cas.cz/record/12133/files/05-01-0302.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-01-0302.
000012133 962__ $$r9324
000012133 980__ $$aPAPER