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

有限变形固结理论在恒应变率固结试验中的适用性研究。

基本信息

批准号：
08650578
负责人：
SHIMIZU Masayoshi
金额：
$ 1.02万
依托单位：
Tottori University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

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.

本研究的目的是通过基于有限变形理论的数值分析来了解饱和粘性土在恒定应变率固结试验中的行为，并检查根据CRS固结试验结果估计样品本构特性的分析方法的适用性。主要结论如下：1.小应变假设虽然在实际中是有用的，但可能会导致我们对CRS固结土的实际性状产生误解.研究者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，并与常规分析方法估算的本构性质进行了比较。研究者的方法的优点之一是，本构特性可以从CRS试验中估计，CRS试验的应变率比日本岩土协会标准规定的应变率高10倍。研究者的方法也适用于在没有小应变假设的情况下导出的理论解。然而，估计的属性强烈地受到线性化控制方程的假设的影响，因此，属性与实际属性不同。