000010528 001__ 10528
000010528 005__ 20141205155737.0
000010528 04107 $$aeng
000010528 046__ $$k2008-10-12
000010528 100__ $$aKirita, Fumio
000010528 24500 $$aSeismic Transient Change Of Natural Frequency Estimation by Adaptive Filtering Scheme

000010528 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010528 260__ $$b
000010528 506__ $$arestricted
000010528 520__ $$2eng$$aA new system identification procedure, named as “Adaptive Forward-Backward Kalman Filter (AFB-KF)”, is developed to estimate natural frequency transition of a building that exhibits time-varying nonlinear behavior during a strong earthquake. Such natural frequency transition changes with seismic damage level of a building; therefore the natural frequency estimation by the AFB-KF is useful to detect the occurrence of seismic damage of the building. This paper presents theoretical background of the system identification procedures proposed herein, and discusses its effectiveness based on numerical simulations and two real lives monitoring of existing buildings. According to the system identification, it is shown that the first natural frequency of the building clearly decreased during the main shock of the earthquake. Therefore it is expected that structural health monitoring is possible by evaluating natural frequency transition during an earthquake based on the AFB-KF.

000010528 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010528 653__ $$aKalman Filter, System Identification, Time-Varying System, Structural Health Monitoring, Time-Backward Estimation, Time Series Renewal Algorithm

000010528 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010528 720__ $$aKirita, Fumio$$iKanazawa, Kenji$$iKitamura, Haruyuki
000010528 8560_ $$ffischerc@itam.cas.cz
000010528 8564_ $$s757605$$uhttps://invenio.itam.cas.cz/record/10528/files/05-06-0115.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-06-0115.
000010528 962__ $$r9324
000010528 980__ $$aPAPER