ID | 58574 |
JaLCDOI | |
Sort Key | 3
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タイトル(別表記) | Computation of non-linear site response by the time-domain finite-difference method
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フルテキストURL | |
著者 |
鳥越 友輔
岡山大学理学部地球科学科
小松 正直
岡山大学大学院自然科学研究科
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抄録 | We have developed a time-domain staggered-grid finite-difference code for modeling non-linear response of a one-dimensionally inhomogeneous subsurface structure to a SH plane-wave incidence. It employs the velocity-stress formulation of elastodynamic equation for the linear part, and adopts a elastoplastic rheology model for the non-linear relation between the stress and strain. In this paper, we apply this code to four constitutive models from linear-elastic to nonlinear: (1) linear elastic model, (2) linear viscoelastic model, (3) elastoplastic model, and (4) viscoelastoplastic model, which simulate shallow sand and clay structures and are vibrated by a vertically incident SH plane-wave of Ricker wavelet, to compare the linear and the non-linear soil behaviors including low strains damping (viscoelastic effect) and/or hysteretic attenuation (non-linear effect). We also apply it to a local strong-motion record of the 2000 Western-Tottori earthquake (MW6.8). We then simulate characteristics of non-linear site response such as reduction of the spectral amplitude in the high frequency band and shift of the peak frequencies to lower frequencies.
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キーワード | finite-difference method
non-linear site response
strong motion
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出版物タイトル |
Okayama University Earth Science Report
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発行日 | 2019-12-27
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巻 | 26巻
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号 | 1号
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出版者 | 岡山大学理学部地球科学教室
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出版者(別表記) | Department of Earth Sciences, Faculty of Science, Okayama University
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開始ページ | 1
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終了ページ | 17
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ISSN | 1340-7414
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NCID | AN10506284
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資料タイプ |
紀要論文
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OAI-PMH Set |
岡山大学
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言語 |
日本語
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著作権者 | © 2019 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
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論文のバージョン | publisher
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Eprints Journal Name | esr
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