Consistent modeling of time-dependent bahavior from normally consolidated soil to overconsokidated and naturally deposited soils

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K14033
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Geotechnical engineering
• Research Institution: Chubu University
• Principal Investigator: NAKAI Teruo 中部大学, 工学部, 客員教授 (00110263)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: クリープ / 時間効果 / 構成モデル / 応力緩和 / ひずみ速度 / 地盤材料 / 有限要素法 / 地盤の変形

Outline of Final Research Achievements

Traditional visco-plastic models for geomaterials based on non-stationary flow surface or over-stress theories have problems on the consistency with inviscid models and/or their objectivity, and cannot describe uniquely time-dependent behavior from normally consolidated soil to over consolidated and naturally deposited soils
In the present study, utilizing well-known experimantal evidence that normlly consolidated line on e-lnp relations shifts upward and downward depending on the strain rate and the secondary compression coefficient, the modesl which can describe various inviscid behaviors of normally consoliated, over consolidated and naturally deposited soils are extended to viscid models.　Inplementing these 1D and 3D viscid models into finite element programs, some deformation analyses of grounds are carried out.

Free Research Field

地盤工学