000011819 001__ 11819
000011819 005__ 20141205155950.0
000011819 04107 $$aeng
000011819 046__ $$k2008-10-12
000011819 100__ $$aTakenobu, Masahiro
000011819 24500 $$aNonlinear Response of Firm Ground Identified from Vertical Array Records and Its Simulation Using Multiple Mechanism Model

000011819 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011819 260__ $$b
000011819 506__ $$arestricted
000011819 520__ $$2eng$$aIn the design procedure of port structures including quay walls in Japan, the residual deformation of structures subject to strong ground motions is often evaluated by finite element analysis. For this analysis, the material parameters should be, in principle, determined based on in-situ geotechnical investigations and laboratory tests. The application of laboratory tests for a firm ground with a shear wave velocity over 300 m/s, however, is quite debatable because, due to a possible disturbance during sampling from the firm ground, the shear strength of the soil, for example, might be significantly underestimated. So far we have no reliable way to determine the model parameters for the firm ground in such analysis, although the results of such analysis are often dependent on how we model the firm ground. During the 2007 Off Mid Niigata Prefecture, Japan, earthquake (MJ6.8), very important data was obtained at a vertical array site KSH in the near-source region operated by the Tokyo Electric Power Company, Inc. (TEPCO). The layers spanned by the vertical array mostly consist of a firm ground with shear wave velocity larger than 300m/s. In this article, the authors try to simulate the response of the vertical array site using a computer program FLIP, which is a finite element code equipped with the multiple mechanism model. The simulation results suggest that use of a typical value of shear resistance angle may lead to underestimation of the shear strength of a firm ground subject to a very strong ground motion.

000011819 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011819 653__ $$aSoil nonlinearity, Firm ground, Vertical array, Multiple mechanism, The 2007 Off Mid Niigata Prefecture earthquake

000011819 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011819 720__ $$aTakenobu, Masahiro$$iSugano, Takahiro$$iNozu, Atsushi
000011819 8560_ $$ffischerc@itam.cas.cz
000011819 8564_ $$s637536$$uhttps://invenio.itam.cas.cz/record/11819/files/02-0150.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 02-0150.
000011819 962__ $$r9324
000011819 980__ $$aPAPER