ダウンロード数: 318

このアイテムのファイル:
ファイル 記述 サイズフォーマット 
2009JB006567.pdf1.07 MBAdobe PDF見る/開く
タイトル: Temporal changes of subsurface velocities during strong shaking as seen from seismic interferometry
著者: Yamada, Masumi  KAKEN_id
Mori, Jim
Ohmi, Shiro  kyouindb  KAKEN_id
著者名の別形: 山田, 真澄
発行日: 5-Mar-2010
出版者: American Geophysical Union (AGU)
誌名: Journal of Geophysical Research
巻: 115
論文番号: B03302
抄録: We apply a deconvolution method to a strong motion data set recorded at the surface and in boreholes in northeast Honshu, Japan. We try to characterize the nonlinear effects of the subsurface soil during strong shaking and show the change of the subsurface velocity structure during the shaking. The deconvolved waveforms reflect the subsurface velocity structure, and their horizontal and vertical components correspond to S and P wave, respectively, traveling from the borehole to the ground surface. The strong motion records with smaller values of peak acceleration do not include significant nonlinear effects, so the deconvolved waveforms of the observed accelerations can be well simulated by the program SHAKE91. For high acceleration motions during the shaking of two separate earthquakes, large reductions of near-surface velocities are seen. In results for the 2008 Iwate-Miyagi Nairiku earthquake, the large high-frequency ground motions over 4g at one near-source station caused a nonlinear response of the soil, and the reduction of the average shear wave velocity reached 24%. This corresponds to a stiffness change of over 75%. The soil properties and the stiffness coefficient which changed during the shaking did not fully recover after the shaking, leaving a static change.
著作権等: ©2010 American Geophysical Union
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/128846
DOI(出版社版): 10.1029/2009JB006567
出現コレクション:学術雑誌掲載論文等

アイテムの詳細レコードを表示する

Export to RefWorks


出力フォーマット 


このリポジトリに保管されているアイテムはすべて著作権により保護されています。