000011583 001__ 11583
000011583 005__ 20141205155925.0
000011583 04107 $$aeng
000011583 046__ $$k2008-10-12
000011583 100__ $$aSekiguchi, Toru
000011583 24500 $$aEffects of Nonlinear Soil Amplification on Strong Ground Motions during the Niigataken Chuetsu-Oki Earthquake in 2007

000011583 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011583 260__ $$b
000011583 506__ $$arestricted
000011583 520__ $$2eng$$aStrong ground motions were recorded at a downhole array by the service hall in the Kashiwazaki-Kariwa nuclear power station during the Niigataken Chuetsu-oki Earthquake in 2007. The peak period of spectral amplification ratios between the near-surface ground motion and the deepest underground motion recorded during the main shock was similar to those of weak motions during the aftershocks. The spectral amplification ratios in the short period range less than one second of the main shock are less than those of the aftershocks. It seems that the nonlinear amplification due to surface soils might have had a strong effect on the strong motion during the main shock. A field investigation and its spectral analysis based on the surface wave method were conducted to evaluate the near-surface soil profile at the station. In order to simulate the observed strong motions during the main shock, one-dimensional equivalent linear analyses were conducted using the estimated soil profiles. The Fourier spectra of the computed motions agree reasonably well with those of the observed motions. The analysis simulates well the amplification of strong ground motions between the near-surface and the deep underground during different levels of shaking and this suggests that the nonlinear properties of the surface soil might have had strong effects on the strong motion during the main shock.

000011583 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011583 653__ $$asurface soil, strong motion, soil nonlinearity

000011583 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011583 720__ $$aSekiguchi, Toru$$iNakai, Shoichi
000011583 8560_ $$ffischerc@itam.cas.cz
000011583 8564_ $$s691044$$uhttps://invenio.itam.cas.cz/record/11583/files/02-0160.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 02-0160.
000011583 962__ $$r9324
000011583 980__ $$aPAPER