000010264 001__ 10264
000010264 005__ 20141205155708.0
000010264 04107 $$aeng
000010264 046__ $$k2008-10-12
000010264 100__ $$aHou, Xingmin
000010264 24500 $$aA Comparison of Damping Ratio Analysis for Dynamic Foundation Vibration

000010264 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010264 260__ $$b
000010264 506__ $$arestricted
000010264 520__ $$2eng$$aDamping ration measurement method of a foundation was studied theoretically and experimentally based on the corresponding Chinese testing and design Codes. It shows that there is a relatively large difference between numerical results of Codes, approximate formulae of elastic half-space analytical solution, and the practical testing result. Therefore, six-degree-freedom time histories of the center of mass of a foundation are calculated from three-component vibration curves of some points on the foundation surface to be selected as the timehistory of damping ratio calculating of subsoil. And also, to reduce the difference mentioned above, influence of window function on the subsoil damping ratio of a massive concrete foundation is analyzed based on logrithmic decrement method in the time domain and point-peak method in the frequency domain. It shows that damping ratio decreases as the smoothing times increases in the time domain, and on the contrary in the frequency domain.

000010264 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010264 653__ $$aSubsoil damping ratio, motion of center of mass, time-domain, frequency-domain, window function

000010264 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010264 720__ $$aHou, Xingmin$$iKong, Lingzhao$$iChen, Jianli
000010264 8560_ $$ffischerc@itam.cas.cz
000010264 8564_ $$s1922296$$uhttps://invenio.itam.cas.cz/record/10264/files/14-0052.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 14-0052.
000010264 962__ $$r9324
000010264 980__ $$aPAPER