000010910 001__ 10910
000010910 005__ 20141205155816.0
000010910 04107 $$aeng
000010910 046__ $$k2008-10-12
000010910 100__ $$aMatsuda, Toshikazu
000010910 24500 $$aTwo-Layer Modeling of Ground Based on Microtremor Observations and Its Application to Areas Devastated by Recent Major Earthquakes in Japan

000010910 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010910 260__ $$b
000010910 506__ $$arestricted
000010910 520__ $$2eng$$aWe developed an empirical method of modeling surficial soil deposit based on microtremor measurements observed on a ground surface. The method, replacing a layered soil with an equivalent two layer soil model based on horizontal-to-vertical spectral ratio of microtremors, enables evaluation of site amplification factors near/below the predominant frequency of the site. The method is then applied to areas devastated by two recent major earthquakes which occurred consecutively in the Hokuriku area, Japan in 2007. The first one occurred in March at northern Noto Peninsula. Severe damage to houses was concentrated at the Tohge area, Monzen. The second one occurred in Kashiwazaki, Niigata. Severe damage to wooden houses occurred in downtown areas developed on a sand dune. Microtremor measurements were made at approximately 20 locations for each area so as to cover the most severely damaged areas. Obvious relationships between damage to houses and estimated soil characteristics are recognized in Monzen. Contrary, we could not find a clear relationship between damage to houses and site amplification in Kashiwazaki.

000010910 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010910 653__ $$amicrotremor measurement, H/V spectrum, site amplification, multiple reflection theory, Ishikawa-ken Noto peninsula Earthquake, Niigataken Chuetsu-oki Earthquake

000010910 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010910 720__ $$aMatsuda, Toshikazu$$iMikami, Atsushi$$iOkamoto, Terumasa$$iNakano, Susumu$$iOkabe, Takeshi$$iNariyuki, Yoshifumi
000010910 8560_ $$ffischerc@itam.cas.cz
000010910 8564_ $$s4275473$$uhttps://invenio.itam.cas.cz/record/10910/files/01-1017.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 01-1017.
000010910 962__ $$r9324
000010910 980__ $$aPAPER