| 掲載雑誌（和）： | 日本地震工学シンポジウム論文集 |
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| Vol： | 10-1巻 |
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| 年： |
1998年
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| 頁： |
789-794頁
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| 著者（和）： |
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| タイトル（和）： |
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| 抄録（和）： |
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| キーワード（和）： |
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| 掲載雑誌（英）： |
THE EARTHQUAKE ENGINEERING SYMPOSIUM PROCEEDINGS
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| 著者（英）： |
Ali NIOUSHA,Masato MOTOSAKA
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| タイトル（英）： |
ANALYTICAL INVESTIGATION OF GROUND MOTIONS DIRECTIONALITY FOCUSED ON IRREGULAR UNDERGROUND STRUCTURE
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| 抄録（英）： |
Ground motions directionality focused on irregular underground structure is investigated. During The 1994 Sanriku Haruka Oki Earthquake, the amplification from Hachinohe JMA (JMA) located on rock site to Hachinohe City Hall (HCH) located at sediment site showed strong directionality, especially the NS component (HCH) was largely amplified at around 1 Hz compared to EW one. The authors perform wave propagation analyses to explain the phenomena. The spatial variations and ground motions directionality due to irregular underground structure are discussed. The analytical results show that this amplification is due to the constructive interference of basin-induced surface waves (Love) and body waves (SH-wave) including refracted waves.
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| キーワード（英）： |
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| 記事区分： |
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| 区分： |
委員会論文集 |
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