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| 掲載雑誌 |
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| Vol |
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| Date |
2009.6 |
| Page |
pp.1207-1215 |
| 著者 |
吉田 望,大矢 陽介,菅野 高弘 |
| タイトル |
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| 抄録 |
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| キーワード |
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| 記事区分： |
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| 区分 |
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| The Medium |
International Conference on Performance-Based Design in Earthquake Geotechnical Engineering |
| Writer |
N. Yoshida, Y. Ohya & T. Sugano |
| Title |
New Biot's equation for finite element analysis |
| Abstract |
A finite element modeling for liquefaction analysis, which is free from volume locking and hourglass instability is proposed. Volume locking occurs under undrained condition or similar in the liquefaction analysis, and hourglass instability occurs when excess reduced integration is employed to avoid volume locking.
Proposed method employs different numerical integration schemes for porewater and soil skeleton to build
element matrices: ordinary integration for soil skeleton and reduced integration for all other element matrices. Numerical examples are made to evaluate effectiveness and accuracy of the proposed method by comparing other existing methods. The proposed method is shown to be accurate and to be free from both volume locking
and hourglass instability. Finally, case study of liquefied ground is made to simulate Akita port damaged during
the 1983 Nihonkai-chubu earthquake, and succeeded to explain the damage. |
| Key Words |
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| Note |
The paper written in English |
