濃尾平野の地盤構造と強振動特性に関する研究

Material type: 文書・図像類

Author: 佐口, 浩一郎ほか

Publisher: 愛知工業大学

Publication date: 1999-03-31

Material Format: Digital

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Note (General)：: It is important to know soil structure, especially S-wave velocity structure, in urban areas to study on seismic microzoning or to predict strong moti...

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Material Type: 文書・図像類
Title: 濃尾平野の地盤構造と強振動特性に関する研究
Author/Editor: 佐口, 浩一郎
正木, 和明
Author Heading: 佐口, 浩一郎
正木, 和明
Publication, Distribution, etc.: 愛知工業大学
Publication Date: 1999-03-31
Publication Date (W3CDTF): 1999-03-31
Alternative Title: ノウビヘイヤノジバンコウゾウトキョウシンドウトクセイニカンスルケンキュウ
Study on Soil Structure and Strong Motion Characteristics of Nobi Plain, Central Japan
Periodical title: 愛知工業大学研究報告. B, 専門関係論文集 = Bulletin of Aichi Institute of Technology. Part B
No. or year of volume/issue: 34
Volume: 34
Pages: 91-98
ISSN (Periodical Title): ISSN : 0387-0812
Text Language Code: jpn
Target Audience: 一般
Note (General): It is important to know soil structure, especially S-wave velocity structure, in urban areas to study on seismic microzoning or to predict strong motion. However it is difficult to carry out a survey such as refraction or reflection because there is no space in urban areas for a survey. In these days, a survey technique to estimate underground velocity structure using microtremors instead of these method has been developed. The technique involves measurement of phase velocities of the fundamental-mode Rayleigh waves in microtremors and inversion of these phase velocity to geological structures. We carried out array observations at two sites (Nakagawa in Nagoya City, Kanie City) in Nobi plain, where we install strong motion station. Seven seismographs arranged in a suitable array observed the movement in a vertical direction of the ground surface. The data were processed mainly by the frequency-wavenumber (F-K) method. Phase velocities dispersion relations were obtained for the fundamental-mode of Rayleigh waves were obtained to be about 0.2 to 2.2km/s in frequency range from 0.2Hz to 4.0Hz at two observation sites. Then using an inversion technique, the S-wave velocity structures in depths of 2000 meters were obtained. The inverted models consist of seven or eight layers. Basement layer has an S-wave velocity of 3.1km/s. Theoretical site amplification factors were determined by assuming multi reflection of S-wave. They fairly agreed with those calculated on strong motion data. We may conclude that we can use the S-wave velocity structure models determined by array observations of microtremors for evaluating earthquake motions.
identifier:http://repository.aitech.ac.jp/dspace/handle/11133/1077
Access Restrictions: 限定公開
Periodical Title (NCID): AN00007801
https://ci.nii.ac.jp/ncid/AN00007801
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 愛知工業大学 : 愛知工業大学学術情報リポジトリ