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This paper deals with estimation of a site effect of local government observation sites. We have already proposed the method to evaluate site effect by using PGA and JMA seismic intensity obtained at local government observation site because it is difficult to obtain waveform records there. This method can be accurately evaluate an averaged amplification factor of site effect in arbitrary range of period from 0.1 to 1second, but not accurately evaluate it between 1 and 2 second. In this study, peak acceleration ratio related to relative amplitude of earthquake spectrum in this period range was considered in evaluation in order to improve the accuracy of evaluation of the site effect in this period range. The correlation between peak acceleration ratios calculated from records observed in earthquakes of about magnitude 7 and the site effect in this period range was estimated. 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地震動指標の地盤増幅度と最大加速度比によるサイト特性の推定
http://hdl.handle.net/2297/36235
http://hdl.handle.net/2297/36235ccb922e8-1e88-49ef-9b6d-67d30ffaac88
名前 / ファイル | ライセンス | アクション |
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TE-PR-IKEMOTO-T-12.pdf (1.2 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-10-03 | |||||
タイトル | ||||||
タイトル | 地震動指標の地盤増幅度と最大加速度比によるサイト特性の推定 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | A Study on estimation of site effect of local government observation sites using amplifications factors and peak acceleration ratio | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
森本, 吉輝
× 森本, 吉輝× 西川, 隼人× 池本, 敏和× 宮島, 昌克 |
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書誌情報 |
土木学会論文集A1(構造・地震工学)= JSCE Journal of Earthquake Engineering 巻 66, 号 1, p. 12-19, 発行日 2010-01-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2185-4653 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.2208/jscejseee.66.12 | |||||
出版者 | ||||||
出版者 | 土木学会 = Japan Society of Civil Engineers | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 著者らは地震波形の収集が困難な自治体観測点を対象に,最大地動加速度と計測震度の地盤増幅度からサイト特性を推定する手法を提案している.この手法はサイト特性の周期0.1~1秒における任意区間の平均増幅度は精度良く推定できたが,周期1~2秒では推定精度が良くなかった.本研究では周期1~2秒のサイト特性の推定精度を向上させるために,地震動の周期1~2秒成分の相対的な強さと相関がある最大加速度比をサイト特性推定の際に考慮した.推定にあたり,M7前後の地震観測記録から計算した最大加速度比とサイト特性の周期1~2秒の増幅度の相関を調べたところ,両者に良好な相関が見られた.地盤増幅度と最大加速度比をパラメータとする式によってサイト特性を求めたところ,周期1~2秒におけるサイト特性の観測値と推定値の相関係数が向上した.また,ほとんどの周期帯で相関係数が0.9を超えていた. This paper deals with estimation of a site effect of local government observation sites. We have already proposed the method to evaluate site effect by using PGA and JMA seismic intensity obtained at local government observation site because it is difficult to obtain waveform records there. This method can be accurately evaluate an averaged amplification factor of site effect in arbitrary range of period from 0.1 to 1second, but not accurately evaluate it between 1 and 2 second. In this study, peak acceleration ratio related to relative amplitude of earthquake spectrum in this period range was considered in evaluation in order to improve the accuracy of evaluation of the site effect in this period range. The correlation between peak acceleration ratios calculated from records observed in earthquakes of about magnitude 7 and the site effect in this period range was estimated. Since both have a good correlation, site effects were evaluated by formula in terms of amplification factors and peak acceleration ratio. As a result, correlation between observed site effect and evaluated one in this period range was improved, and its correlation coefficient were more than 0.9 in almost all period range. | |||||
権利 | ||||||
権利情報 | Copyright © Japan Society of Civil Engineers 土木学会 | 許可を得て登録 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://www.jstage.jst.go.jp/browse/jscejseee/-char/ja/ | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | http://www.jsce.or.jp/ |