2004 Fiscal Year Final Research Report Summary
An elasto-plastic interpretation on mechanical properties of natural deposited clays
| Project/Area Number |
15360251
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | Nagoya University |
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Principal Investigator |
NAKANO Masaki Nagoya University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (00252263)
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| Co-Investigator(Kenkyū-buntansha) |
ASAOKA Akira Nagoya University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (50093175)
NODA Toshihiro Nagoya University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (80262872)
KANDA Kazuhiro Nagoya University, Graduate School of Engineering, Assistant Professor, 大学院・工学研究科, 助手 (30314040)
TAKAINE Toshihiro Asanuma Corporation, Research Worker, 技術研究所, 研究員
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| Project Period (FY) |
2003 – 2004
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| Keywords | Clay / Soil Structure / Consolidation / Overconsolidation / Anisotropy / Elasto-plastic equation |
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| Research Abstract |
Undrained triaxial compression tests and oedometer tests were carried out on two types of naturally deposited undisturbed clay, Pleistocene clay and Holocene clay, and the behaviors of these clays were then simulated using the Super/subloading Yield Surface Cam-clay model (Asaoka, Nakano and Noda,1998,2000 and Asaoka et al.,2002), in which the concepts of "structure," overconsolidation, anisotropy, and their evolution laws, are introduced into the modified Cam-clay model. The findings of the present study are as follows :
1)For the two types of undisturbed clay, the Super/subloading Yield Surface Cam-clay model can simulate undrained triaxial compression behaviors ranging from the normally consolidated state to the overconsolidated state, corresponding to various isotropic pressures using a single set of material constants.
2)In addition, the model can simulate one-dimensional compression behaviors using the same material constants as those used for the undrained triaxial compression behavior simulation.
3)Both undrained shear and one-dimensional compression behaviors for the two types of undisturbed clay, that is Pleistocene clay and Holocene clay, which have different loading histories and have undergone different ageing effects, were simulated using the Super/subloading Yield Surface Cam-clay model by changing the evolution parameters.
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