書誌事項
- タイトル別名
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- Evaluation of site spectrum using amplification factors for earthquake ground motion indi ces and H/V spectrum of microtremor
抄録
金沢大学理工研究域地球社会基盤学系
本論文では地震波形が得られていない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と微動H/Vスペクトルによって増幅スペクトルを推定する手法を提案した.まず,中部地方の地震観測点の記録を用いて,回帰分析により,最大地動加速度と計測震度の地盤増幅度,応答スペクトルの増幅スペクトルを求めた.続いて,地盤増幅度と増幅スペクトルの相関関係を調べたところ,周期1秒付近までは両者に良好な相関が見られた.周期1秒より長周期の増幅スペクトルの推定精度を向上させるために,微動H/Vスペクトルを周期をパラメータとする関数で近似させて,増幅スペクトルの推定に用いた.地盤増幅度と微動H/Vスペクトルの近似関数をパラメータとする式によって増幅スペクトルを推定したところ,周期1秒以上での推定精度が向上した.
In this study, we proposed a method to evaluate a site spectrum using amplification factors for peak ground acceleration and JMA seismic intensity, H/V spectrum of microtremor at local government observation sites where seismic waveform records were not stored. Firstly, the amplification factors and site spectra of acceleration response spectra at JMA, K-NET, KiK-net observation sites in the Chubu region were evaluated by a regression analysis. The amplification factors and site spectra have a good correlation at less than one second of period. In order to improve the evaluation to site spectra at more than one second of period, we used a function approximated by the H/V spectra as a parameter of the site spectra. The site spectra by a regression analysis using amplification factors and the approximated function were evaluated. The precision of evaluation at more than one second of period was improved.
収録刊行物
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- 土木学会論文集A1(構造・地震工学) = Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))
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土木学会論文集A1(構造・地震工学) = Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 67 (3), 454-463, 2011
土木学会 Japan Society of Civil Engineers
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詳細情報 詳細情報について
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- CRID
- 1390854717445255040
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- NII論文ID
- 120007192405
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- ISSN
- 21854653
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- IRDB
- CiNii Articles