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.

在本研究计画中，我们已推导出各种黏土的强度参数，这些参数是由各种黏土的室内及现场试验所获得。基本思想是在增量型的弹粘塑性本构模型的发展。特别是对等体积剪切箱试验和现场十字板试验所得到的强度参数进行了分析，这两种试验由于其理论基础尚不完善，费用相对较低，但在工程实践中尚未得到广泛应用。除了纯理论推导强度参数外，我们还开发了计算机程序来模拟与粘土破坏相关的三维土/水耦合问题。这个有限元程序需要一台超级计算机来解决问题。采用基于弹粘塑性本构模型的三维土/水耦合问题有限元程序，成功地模拟了定体积剪切箱试验和现场十字板试验。所得结果与全国各地采集的各种粘土的试验结果相吻合。

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”。