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Trampoline Effect in Extreme Ground Motion
https://nied-repo.bosai.go.jp/records/2989
https://nied-repo.bosai.go.jp/records/2989025f48ac-4344-4af8-a7a3-58c1cdbc7e78
Item type | researchmap(1) | |||||||||||
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公開日 | 2023-03-30 | |||||||||||
タイトル | ||||||||||||
言語 | en | |||||||||||
タイトル | Trampoline Effect in Extreme Ground Motion | |||||||||||
言語 | ||||||||||||
言語 | eng | |||||||||||
著者 |
Shin Aoi
× Shin Aoi
× Takashi Kunugi
× Hiroyuki Fujiwara
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抄録 | ||||||||||||
内容記述タイプ | Other | |||||||||||
内容記述 | In earthquake hazard assessment studies, the focus is usually on horizontal ground motion. However, records from the 14 June 2008 Iwate- Miyagi earthquake in Japan, a crustal event with a moment magnitude of 6.9, revealed an unprecedented vertical surface acceleration of nearly four times gravity, more than twice its horizontal counterpart. The vertical acceleration was distinctly asymmetric; the waveform envelope was about 1.6 times as large in the upward direction as in the downward direction, which is not explained by existing models of the soil response. We present a simple model of a mass bouncing on a trampoline to account for this asymmetry and the large vertical amplitude. The finding of a hitherto- unknown mode of strong ground motion may prompt major progress in near- source shaking assessments. | |||||||||||
言語 | en | |||||||||||
書誌情報 |
en : SCIENCE 巻 322, 号 5902, p. 727-730, 発行日 2008-10 |
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出版者 | ||||||||||||
言語 | en | |||||||||||
出版者 | AMER ASSOC ADVANCEMENT SCIENCE | |||||||||||
ISSN | ||||||||||||
収録物識別子タイプ | ISSN | |||||||||||
収録物識別子 | 0036-8075 | |||||||||||
DOI | ||||||||||||
関連識別子 | 10.1126/science.1163113 |