000009602 001__ 9602
000009602 005__ 20141205150222.0
000009602 04107 $$aeng
000009602 046__ $$k2008-10-12
000009602 100__ $$aCadet, Heloise
000009602 24500 $$aA New Proposal for Site Classification Based on Ambient Vibration Measurements and the Kiknet Strong Motion Data Set

000009602 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009602 260__ $$b
000009602 506__ $$arestricted
000009602 520__ $$2eng$$aThe goal of the present paper is to propose an alternative site classification and the associated spectral shapes, that could be easily used in building codes and microzonation studies. The site classification is based on a twoparameter characterization, consisting of the average shear wave velocity, VSz, over the top z meters (z between 5 and 30), and the site fundamental frequency f0. Both parameters are easily available from non-invasive survey techniques (ambient vibrations, MASW, SASW). A comprehensive analysis on about 500 sites from the KIKNET network, shows that f0 is very poorly correlated with any of the VSz values, thus providing independent, complementary information on the overall thickness and stiffness of sedimentary cover, and the surface stiffness. The corresponding site amplification factors are derived empirically from the average surface / downhole (SDSR) spectral ratios, with a correction procedure to normalize the raw SDSR to a standard reference (with VS30 = 800 m/s) located at surface. Finally, the correlation between site parameters and site amplification factors is achieved by normalizing the frequency axis with respect to f0, and a least-square fit of the amplitude with VSz. The largest variance reduction is obtained for the couple (VS30, f0), while a very simple site classification based only on f0 leads to satisfactory misfit values.

000009602 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009602 653__ $$aSite classification, amplification factor, Kiknet data, fundamental frequency, average velocity

000009602 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009602 720__ $$aCadet, Heloise$$iBard, Pierre-Yves$$iDuval, Anne-Marie
000009602 8560_ $$ffischerc@itam.cas.cz
000009602 8564_ $$s933668$$uhttps://invenio.itam.cas.cz/record/9602/files/03-01-0036.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 03-01-0036.
000009602 962__ $$r9324
000009602 980__ $$aPAPER