Research on the applicability of finite-deformation-consolidation theory to constant-rate-of-strain consolidation tests.

本研究的目的是通过基于有限变形理论的数值分析，了解饱和粘性土在等应变固结试验中的行为，并检验根据CRS固结试验结果估计试件本构性质的分析方法的适用性。主要结论有：1。小应变假设可能会使我们误解CRS固结集中土体的实际性状，尽管该假设在实际中是有用的。研究人员提出的分析方法可以用理论解来估计样品的本构性质，即使该解不是基于小应变假设。将该方法应用于小应变假设下的常规理论，将估算的本构特性与常规分析方法估算的本构特性进行了比较。研究人员方法的优点之一是，可以从CRS试验中估计本构特性，应变速率比日本岩土学会标准规定的应变速率高十倍。研究人员的方法也适用于在没有小应变假设的情况下得到的理论解。然而，估计的性质受到将控制方程线性化的假设的强烈影响，因此性质与实际性质不同。

The objectives of this research project is to understand the behavior of saturated clayy soils in constant-rate-of-strain consolidation tests through numerical analyzes based on the finite deformation theory and to examine the applicability of analysis methods that estimate the constitutive properties of the sample from the results of CRS consolidation tests. Main conclusions are1. The small strain assumption may lead us to misunderstand the actual behavior of soils in CRS consolidati tsets although the assumption is practically useful.2. The analysis method the investigator proposed can estimate the constitutive properties of the sample with a theoretical solution, even if the solution is not based on the small strain assumption. Applying the method to the conventional theory derived with the small strain assumption, the estimated constitutive properties were compared with those properties estimated by the conventionl analysis method. One of advantages of the investigator's method is that constitutive properties can be estimated from CRS tests conducted with ten times higer rate of strain than the rate a Japanese Geotechnical Society Standard specifies.3. The investigator's method was applied to the theoretical solution derived without the small strain assumption, too. However, the estimated properties were strongly affected by the assumption made to linearize the governing equation, and therefore the properties were different from the actual properties.