| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2013: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2012: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
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| Outline of Final Research Achievements |
Saturated and unsaturated cyclic triaxial test and vibration test were performed to investigate the liquefaction behavior on high water content Shirasu soil which caused mud flow failure in 2011 Tohoku earthquake. Liquefaction resistance of densely compacted Shirasu soil was 3.3 times greater than that of normally compacted one and toughness was also improved. Hysteresis of water retention curve during unsaturated cyclic loading and shaking process were clarified. And the results could be guessed the dilatancy and shrinkage behavior of soil.
By using cyclic tests results, soil-water coupled FEM-FDM code material parameter set was decided, and earthquake behavior of Shirasu ground was verified. The calculation behavior was agreed with real damage.
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