SITE RESPONSE DISTRIBUTION FOR GROUND MOTIONS IN A PERIOD RANGE OF 2 TO 4 S IN THE KANTO BASIN / 関東平野における周期2~4秒のサイト特性分布
- Resource Type
- Journal Article
- Authors
- Hiroe MIYAKE; Kazuki KOKETSU; Kenichi TSUDA; Takashi HAYAKAWA; 三宅 弘恵; 早川 崇; 津田 健一; 纐纈 一起
- Source
- 日本建築学会構造系論文集 / Journal of Structural and Construction Engineering (Transactions of AIJ). 2014, 79(701):895
- Subject
- Dense seismic observation network
Distribution of site response
Ground motions in a period range of 2 to 4 s
Kanto basin
サイト特性分布
周期2~4秒の地震動
関東平野
高密度地震観測網
- Language
- Japanese
- ISSN
- 1340-4202
1881-8153
We estimated the distribution of site response for ground motions in a period range of 2 to 4 s in the Kanto basin for earthquake resistant design of skyscrapers or base-isolated buildings with the resonant period. We used the spectral inversion method to separate source, path, and site effects by using the data from very dense seismic observation networks in the Kanto basin. The resultant site response was in good agreement with spectral ratio of records observed at ground surface and seismic basement. This indicates the estimation was successful. The resultant site response was large around Ichikawa city due to thick soft surface layers. In the east of Kanagawa prefecture, the site response showed variability from a factor of 3 to 5. The difference was not only due to the effect of 1-D velocity structure beneath the sites but also that of 3-D velocity structure.