経験的サイト増幅特性評価手法に関する検討

• 鶴来 雅人

  財団法人大阪土質試験所

• 田居 優

  財団法人大阪土質試験所

• 入倉 孝次郎

  京都大学防災研究所

• 古和田 明

  関西電力株式会社

書誌事項

タイトル別名

• Estimation of Empirical Site Amplification Effects Using Observed Records
• ケイケンテキ サイト ゾウフク トクセイ ヒョウカ シュホウ ニ カンスル ケ

抄録

A new approach to estimate site amplification effects is proposed. First, we calculate the “bed rock spectra”, adopting the omega-squared source model, frequency-dependent Q-factor, and freesurface effect. The source spectrum is given from seismic moment and corner frequency for each event, using observed records at rock site. The Q-factor is obtained from the spectral inversion analysis. The site amplification, then, is defined as the ratio of observed seismic spectra to the “bed rock spectra” at each site.<BR>We apply this method to evaluate site amplification effects in Kinki and Hokkaido regions, Japan. The results are in good agreement with those obtained from the spectral inversion analysis by TAI et al. (1994, 1995), as long as relative site amplification effects from both methods are compared. The spectral inversion method gives only site amplifications relative to a reference rock site. This method here proposed, instead, gives overall amplifications due to sedimentary layers overlying bed rock, even the site amplification effects caused by weathered layers on a rock site.

収録刊行物

• 地震　第２輯

  地震　第２輯 50 (2), 215-227, 1997

  公益社団法人 日本地震学会

キーワード

• Site amplification effects
• Empirical estimation
• Bed rock spectra
• Observed seismic

詳細情報

• CRID: 1390282679283955456
• NII論文ID: 10002501326
• NII書誌ID: AN00305741
• DOI: 10.4294/zisin1948.50.2_215
• ISSN: 18839029
• ISSN: 2186599X
• ISSN: 00371114
• ISSN: http://id.crossref.org/issn/00371114
• NDL書誌ID: 4292599
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4292599
• Web Site: https://www.jstage.jst.go.jp/article/zisin1948/50/2/50_2_215/_pdf
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可