000010873 001__ 10873
000010873 005__ 20141205155812.0
000010873 04107 $$aeng
000010873 046__ $$k2008-10-12
000010873 100__ $$aMao, C.X.
000010873 24500 $$aDamage Identification for Structures Subjected to Severe Earthquakes Using Wavelet Transform

000010873 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010873 260__ $$b
000010873 506__ $$arestricted
000010873 520__ $$2eng$$aThe availability of methods for damage identification of civil infrastructures under sever earthquake is crucial for safety assessment and repair decision of structures post earthquake. Two novel damage identification methods based on wavelet transform are proposed in this paper. In the first method, the structural seismic responses are dealt with by the continuous wavelet transform directly. The time-varying frequency of structure is identified, and then the occurrence time and degree of structural damage can be observed. However, this method can not work well for multi-degree of freedom system because of the complicated relationship between damage and structural frequencies. Then the second method is presented subsequently to identify nonlinear hysteresis curves of structures during strong earthquake. By this method, not only the location but the degree of structural damage can be identified. This method alternately uses the extended Kalman filter (EKF) and wavelet (W) multiresolution analysis. Then it is entitled as the EKF-W method. In each time step, the full structural states are first estimated by using the EKF based on limited observations; then the tangent stiffness as well as hysteresis curves of structures is identified by using the wavelet multiresolution analysis based on the estimated full states. Simulation results from two structures are presented to illustrate the power and efficiency of the proposed two methods.

000010873 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010873 653__ $$anonlinear, damage identification, severe earthquake, wavelet transform, extended Kalman filter

000010873 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010873 720__ $$aMao, C.X.$$iLi, H.$$iOu, J.P.
000010873 8560_ $$ffischerc@itam.cas.cz
000010873 8564_ $$s266055$$uhttps://invenio.itam.cas.cz/record/10873/files/10-0084.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 10-0084.
000010873 962__ $$r9324
000010873 980__ $$aPAPER