000010139 001__ 10139
000010139 005__ 20141205154146.0
000010139 04107 $$aeng
000010139 046__ $$k2008-10-12
000010139 100__ $$aGuo, Xun
000010139 24500 $$aSymmetrical Signal Method and Its Application in Structural Damage Detection

000010139 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010139 260__ $$b
000010139 506__ $$arestricted
000010139 520__ $$2eng$$aIt is well known that a baseline is necessary in most cases for structural health diagnosis, and it is very difficult to obtain a proper baseline for a given structure. But for some special types of structure, such as truss, cable-stayed and suspension bridges, there are a lot of pairs of elements, which are symmetrical both for geometry and boundary conditions. The vibration signal of these elements should also be symmetrical under symmetrical excitation; the Symmetrical Signal Method (SSM) is based on this idea. With respect to structures composed of slim elements, it is assumed that the same damage occurring simultaneously in the symmetric pairs is an event with small probability. Therefore, transversal flexible vibration of each pair if elements is easy to measure, and a frequency difference between symmetrical components indicates that there may be some problem with the one which has a lower frequency. Detailed inspection can be employed for the suspicious element. Analytical and truss model tests results show that SSM is very effective for detecting local damage in structures composed of pairs of slim elements.

000010139 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010139 653__ $$aDamage Detection, Health monitoring, Vibration Based, Symmetrical Signal Method, Local Damage.

000010139 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010139 720__ $$aGuo, Xun$$iLi, Hongtao$$iSpencer, Bill
000010139 8560_ $$ffischerc@itam.cas.cz
000010139 8564_ $$s367939$$uhttps://invenio.itam.cas.cz/record/10139/files/S06-008.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S06-008.
000010139 962__ $$r9324
000010139 980__ $$aPAPER