Elasto-viscoplastic constitutive model for clay in three-dimensional stresses and its application to practical problems.

三维应力下粘土弹粘塑性本构模型及其在实际问题中的应用。

• 批准号: 61550355
• 负责人: NAKAI Teruo
• 金额: $ 1.28万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550355/
• 关键词: Constitutive model for soils; Viscoplasticity; Clay; Creep; Stress relaxation; Three-dimensional stresses; Stress path; 有限要素法; 粘土の構成公式; 時間依存性; ひずみ速度効果; 非排水せん断; 部分排水せん断; 三軸圧縮・伸張

An elasto-viscoplastic model for clay is proposed. This model can describe uniquely various time-dependent deformation and strength of normally cnsolidated clay in three-dimensional stresses. The influence of intermediate principal stress is taken into consideration by using the concept of t_<ii>, and the influence of stress path on the direction of viscoplastic flow by dividing the viscoplastic strain rate into two components. The time-dependent behavioun is expressed by introducing the non-stationary flow surface theory developed by Sekiguchi. The validies of the model are checked by undrained creep tests, undrained stress relaxation rests, undrained constant strain rate tests and partially drained shear tests and others in triaxial compression and extension conditions.Further, the present model is applied to a finite element analysis of embankment foundation.

提出了粘土的弹粘塑性模型。该模型可以独特地描述三维应力下正常固结粘土的各种随时间变化的变形和强度。利用t_<ii>的概念考虑中间主应力的影响，通过将粘塑性应变率分成两个分量来考虑应力路径对粘塑性流动方向的影响。通过引入 Sekiguchi 提出的非平稳流面理论来表达随时间变化的行为。通过三轴压缩和拉伸条件下的不排水蠕变试验、不排水应力松弛试验、不排水恒应变率试验和部分排水剪切试验等验证了模型的有效性。此外，该模型还应用于路堤的有限元分析。基础。

项目成果

中井照夫 他: 第22回土質工学研究発表会. (1987)

Teruo Nakai 等人：第 22 届土壤工程研究会议（1987 年）。

T.Nakai;K.Tsuzuki: Proc.of 6th Int.Conf.on Numerical Method in Geomechanics. (1988)

T.Nakai；K.Tsuzuki：第六届地质力学数值方法国际会议论文集。

中井照夫,都築顕司: 第21回土質工学研究発表会. 1. 467-470 (1986)

Teruo Nakai，Kenji Tsuzuki：第 21 届土壤工程研究报告 1. 467-470 (1986)。

Nakai,T;Tsuzuki,K.: Pror.6th Int.Conf.on Numerical Methods in Geomechanics. 1. 521-527 (1988)

Nakai,T;Tsuzuki,K.：Pror.6th Int.Conf.on 地质力学数值方法。

Nakai, T.; Tsuzuki, K.: "A model for predicting the viscoplastic stress-strain behaviour of clay in three-dimensional stresses." Proc. of 6th Int. Conf. on Numerical Methods in Geomechanics. 1. 521-527 (1988)

中井，T.；