| Project/Area Number |
21540442
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
|
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| Research Institution | 公益財団法人深田地質研究所 (2011)
Fukada Geological Institute (2009-2010) |
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Principal Investigator |
YOSHIOKA Naoto 公益財団法人深田地質研究所, 研究員 (10167728)
|
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 地震現象 / 砂山崩し / 光弾性 / 応力鎖 / 臨界現象 / 地震 / 臨界状態 |
|---|
| Research Abstract |
Focusing on the similarities between avalanches in sandpile experiments and earthquake occurrence, we performed two-dimensional sandpile experiments using a photo-elastic material in order to clarify the internal structure of a sandpile prior to large avalanches, namely in a critical state. The results of the analysis show that in large sandpiles, stress chains almost parallel to the surface slope are created which seems to organize the critical state. In contrast, small sandpiles have no such a clear structure of stress chains. This fact may bring the differences in the behavior of the avalanches between the large and small sandpiles.
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