000012317 001__ 12317
000012317 005__ 20141205160042.0
000012317 04107 $$aeng
000012317 046__ $$k2008-10-12
000012317 100__ $$aZhao, Guanyu
000012317 24500 $$aDynamic Property Identification of Soil Used in Shaking Table Test: A Comparison of Several Methods

000012317 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000012317 260__ $$b
000012317 506__ $$arestricted
000012317 520__ $$2eng$$aFundamental frequency and damping ratio of soil are very important parameters for calculating dynamic responses of underground structures subject to earthquake excitation. In current practice, these dynamic properties are determined either by static experiment or identification based on spectral analysis. The static experiment, however, may not reflect the evolution of soil properties with the vibration amplitude and frequency. Therefore, the viscous damping ratio of silty clay and its frequency used in a series shaking table test are determined in this paper by three commonly used techniques, i.e. the stochastic subspace identification (SSI), frequency domain decomposition (FDD) and empirical mode decomposition (EMD) plus Hilbert transform (HT). Following items are discussed in details: (1) changing characteristics of soil subjected to different excitation types and with different depth (2) selection of calculating parameters in HHT method (3) discrepancies of results identified by the three methods; also the paper explores the suspending problems in dealing with the large damping ratio systems, willing to propose a new definition method of soil damping in terms of elastic and plastic deformation.

000012317 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012317 653__ $$aShaking table test, empirical mode decomposition, Hilbert transform, stochastic subspace iteration, frequency domain decomposition 

000012317 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000012317 720__ $$aZhao, Guanyu$$iChen, Jun
000012317 8560_ $$ffischerc@itam.cas.cz
000012317 8564_ $$s193874$$uhttps://invenio.itam.cas.cz/record/12317/files/04-01-0155.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 04-01-0155.
000012317 962__ $$r9324
000012317 980__ $$aPAPER