Role of a constitutive model in the stability problem of clay

本构模型在粘土稳定性问题中的作用

• 批准号: 06650533
• 负责人: OHTA Hideki
• 金额: $ 1.15万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650533/
• 关键词: clay; failure; constitutive model; strength anisotropy; strength parameters; limit analysis; finite element method; foundation; 原位置試験; せん断; 間隙水圧; 数値解析; 弾粘塑性構成モデル; 負荷基準; 異方性; 非排水強度; 等体積一面せん断試験; ベーン試験; 1軸試験

In this research project we have derived the strength parameters to be obtained from various kind of laboratory and field tests on clay. The basic idea is in the development of an elastic-viscoplastic constitutive model of incremental type. Especially we have paid attention in analysing the strength parameters to be obtained from the constant-volume-shear-boxtests and the field vane tests both of which are relatively inexpensive and yet are not widely used the in engineering practice for a reason that their theoretical backgrounds are not well-established. In addition to the purely theretical derivation of the strength parameters, we have developed computer programs to simulate the 3-dimensional soil/water coupling problems associated with the failure of clay. This FEM program requires a super-computer to solve the problems. By using the FEM program developed for 3-D soil/water coupling problems based on an elasto-viscoplastic constitutive model, constant-volume-shear-box tests and field vane tests are successfully simulated. The results are in good accordance with the tests on various kind of clays collected from over this country.

在该研究项目中，我们得出了从粘土上的各种实验室和现场测试中获得的强度参数。基本思想在于开发增量类型的弹性粘膜构成模型。特别是我们在分析从恒定体积的剪切 - 波形和田间叶片测试获得的强度参数方面引起了人们的注意，这两种都相对便宜，但由于其理论背景没有完善的原因，但并未在工程实践中广泛使用。除了强度参数的纯粹提供的推导外，我们还开发了计算机程序，以模拟与粘土失败相关的3维土壤/水耦合问题。该FEM计划需要一个超级计算机来解决问题。通过使用基于Elasto-Viscoplastic组成型模型为3-D土壤/水耦合问题开发的FEM程序，成功模拟了恒定体积剪切盒测试和现场叶片测试。结果与从该国收集的各种粘土进行的测试相符。

项目成果

Sugie.S.Dhta.H etl: "Pore Water Migration during plane strain triaxal test" Compression and Comsolidation of Clayey Soils. vol.4. 189-194 (1995)

Sugie.S.Dhta.H 等人：“平面应变三轴试验期间的孔隙水迁移”粘土的压缩和固结。

飯塚敦 他: "粘性土の弾塑性構成式の一表現" 地盤の破壊とひずみの局所化に関するシンポジウム論文集. 135-142 (1994)

Atsushi Iizuka 等人：“粘土弹塑性本构方程的表达式”地面破坏和应变本地化研讨会论文集 135-142 (1994)。

Hideki OHTA.etc: "New looding system of pressurementer." The pressuremeter and its New Avenues. 367-372 (1995)

Hideki OHTA.etc：“压力计的新型注水系统。”

Kurihara, N., Ohta, H., Isoda, T.and Sekiguchi, H.: "Settlement Performance of the Central Hokkaido Expressway Built on Peat." Proceedings of the International Workshop on Advances in Understanding and Modelling the Mechanical Behavior of Peat. (1994)

Kurihara, N.、Ohta, H.、Isoda, T. 和 Sekiguchi, H.：“建立在泥炭上的北海道中部高速公路的沉降性能”。

Fukagawa, R., Aoyagi, T., Ohta, H., Morita, Y., Kashiwagi, A.and Honda, T.: "Pressuremeter Tests under Various Overburden Pressure." Proceedings of the 4th International Symposium-The Pressuremeter and its New Avenues.(1995)

Fukakawa, R.、Aoyagi, T.、Ohta, H.、Morita, Y.、Kashiwagi, A. 和 Honda, T.：“各种覆盖层压力下的压力计测试”。