| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
In this experimental study, the range of shear creep displacement was found to be very narrow, from 1 to 1.03 in terms of shear creep stress ration (i.e., ratio of applied creep stress to residual strength). Regardless of the ratio of creep stress to residual strength, it was found that a constant amount of displacement exists for each soil type, which when reached, the displacement changes from 2nd stage creep to 3rd stage creep leading to creep failure. The results obtained from a series of tests were then used in numerical modeling of residual-state shear creep failure for clay materials using spring (elasticity), dash-pot (viscosity), and slider (plasticity) models. The test results and the results predicted by the numerical model were compared to reveal that the model is well acceptable.
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