000010703 001__ 10703
000010703 005__ 20141205155755.0
000010703 04107 $$aeng
000010703 046__ $$k2008-10-12
000010703 100__ $$aLi, Yingmin
000010703 24500 $$aStatistical Properties of Nonstationarity in Frequency Contents of Ground Motions Based on Zero-Crossing Rate

000010703 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010703 260__ $$b
000010703 506__ $$arestricted
000010703 520__ $$2eng$$aConsiderable attention has been paid to the nonstationarity in frequency contents of ground motions and many methods have been proposed to study this property. But most of these research findings are not suitable for studying the statistical properties and attenuation laws of nonstationarity in frequency contents due to their nonparametric nature, which also blocks their further applications in selection and synthesis of proper ground motions for seismic design. In this paper, zero-crossing rate is used to describe the nonstationary property in frequency contents and an exponential decay model is proposed to represent the zero-crossing rate. Then, the downhill simplex method is employed to estimate the corresponding model (zero-crossing) parameters. By applying the proposed method to ground motions for various magnitudes, epicentral distances and sites, the statistical properties and attenuation laws of zero-crossing parameters are explored and the site-specific zero-crossing parameters are suggested. The work of this paper not only provides a simple and effective approach to study the nonstationarity in frequency contents and its statistical properties, but also gives a more reasonable method to select and synthesize ground motions for seismic design.

000010703 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010703 653__ $$aearthquake ground motion, nonstationarity, frequency content, statistical property, attenuation law, zero-crossing rate

000010703 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010703 720__ $$aLi, Yingmin$$iDong, Yinfeng
000010703 8560_ $$ffischerc@itam.cas.cz
000010703 8564_ $$s189246$$uhttps://invenio.itam.cas.cz/record/10703/files/14-0258.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 14-0258.
000010703 962__ $$r9324
000010703 980__ $$aPAPER