2000 Fiscal Year Final Research Report Summary
Fluid Dynamics Based Numerical Analysis on Failure and Large Deformation of Soft Foundation
| Project/Area Number |
11650503
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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 |
Geotechnical engineering
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| Research Institution | Gifu University |
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Principal Investigator |
YASHIMA Atsushi Gifu University, Department of Civil Engineering, Professor, 工学部, 教授 (90144394)
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| Co-Investigator(Kenkyū-buntansha) |
SAWADA Kazuhide Gifu University, Department of Civil Engineering, Research Associate, 工学部, 助手 (30273121)
ZHANG Feng Gifu University, Department of Civil Engineering, Associate Professor, 工学部, 助教授 (70303691)
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| Project Period (FY) |
1999 – 2000
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| Keywords | fluid dynamic / liquefaction / soft foundation / large deformation / prediction / numerical analysis / CIP method / Bingham fluid |
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| Research Abstract |
A new numerical method was proposed to simulate the mechanical behavior of soft foundation from its initial condition to large deformation and ultimate failure state based on the fluid dynamics based framework.
Firstly, the SIMPLE-VOF method was proposed. In the numerical analysis, the Bingham constitutive model which has yield stress criteria was introduced. The proposed method reproduced the similitude law on the lateral spreading due to liquefaction. The large lateral flow failure of the embankment in the lake was also reproduced in the same framework.
Secondly, CIP based numerical method which can treat compressive and incompressive fluids simultaneouly was proposed. The Bingham model was also introduced into the numerical method. The similitude law was reproduced for the lateral spreading of single layer ground. The lateral flow of the liquefied layer on which non-liquefied layer exists was also predicted. The numerical method was found to reproduce the experimental results on multi layer ground quantitatively.
Finally, CIP method was applied to predict the settlement analysis of the embankment with reinforcement. The significant effect of the reinforcement to reduce the embankment settlement was predicted by the newly proposed method.
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[Publications] Hadush, S., Moriguchi, S., Yashima, A., Sawada, K.and Uzuoka, R.: "CIP based liquefaction-induced lateral spreading analysis"Computer Methods and Advances in Geomechanics, Desai et al.(eds), Balkema. 1093-1098 (2001)
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