An elasto-plastic interpretation on mechanical properties of natural deposited clays

天然沉积粘土力学性能的弹塑性解释

• 批准号: 15360251
• 负责人: NAKANO Masaki
• 金额: $ 3.65万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15360251/
• 关键词: Clay; Soil Structure; Consolidation; Overconsolidation; Anisotropy; Elasto-plastic equation

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.

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过度溶解，各向异性及其进化定律被引入修改后的CAM-CLAY模型中。本研究的发现如下：1）对于两种不受干扰的粘土类型，超级/超载屈服表面凸轮 - 粘合模型可以模拟未渗透的三轴压缩行为，范围从正常固结状态到正常固结状态到过度固定状态，使用过度固定的状态，使用各种同位素的压力，这些压力使用单个模型的材料组合。2）与未排水的三轴压缩行为模拟的物质常数。3）两种不受干扰的粘土的未施加剪切和一维压缩行为，即更新世粘土和全新世粘土，它们具有不同的载荷载荷，它们具有不同的载荷效果，并且使用了不同的效果，并且使用超级/subles cum cum camert surbles bromble-came-came-came-came-came-came-came-came-came-came vare-came-came-came-came-came came came came-came-came-came-came-came-came-came-came-came-came-came-came-came。

项目成果

野田利弘他4名: "自然堆積粘土地盤の構造を劣化させつつ進行する圧密沈下挙動"第39回地盤工学研究発表会概要集(地盤工学会). (発表予定). (2004)

Toshihiro Noda 等 4 人：“固结沉降行为进展，同时恶化自然沉积粘土地基的结构”第 39 届岩土工程研究会议摘要集（日本岩土工程学会）（预定发表）。

Simulation of shear and one-dimensional compression behavior of naturally deposited clays by super/subloading yield surface Cam-clay model

• 发表时间: 2005
• 期刊: Soils and Foundations
• 影响因子: 3.7
• 作者: M. Nakano;K. Nakai;T. Noda;A. Asaoka

Elasto-plastic behavior of naturally deposited clay during/after sampling

采样期间/之后自然沉积粘土的弹塑性行为

• 发表时间: 2005
• 期刊: Soils and Foundations(地盤工学会) 45・1
• 作者: Noda;T.;Yamada;S.;Asaoka;A.
• 通讯作者: A.

A description of mechanical behavior of clay and san based on evolutions of soil structure and overconsolidation

基于土壤结构和超固结演化的粘土和砂的力学行为描述

• 期刊: First Japan-U.S.Workshop on Testing, Modeling and Simulation in Geomechanics, ASCE (印刷中)
• 作者: Nakano;M.;Nakai;K.;Asaoka;A.
• 通讯作者: A.

野田利弘他3名: "骨格構造が発達した粘土地盤の長期圧密沈下挙動に及ぼす各種要因に関する考察"第39回地盤工学研究発表会概要集(地盤工学会). (発表予定). (2004)

Toshihiro Noda等3人：“影响具有发达骨架结构的粘土地基的长期固结沉降行为的各种因素”第39届岩土工程研究会议摘要集（日本岩土工程学会）（预定报告）。 ）