PROGRESSIVE FAILURE OF GEO-STRUCTURE AND STRAIN LOCALIZATION

地质结构和应变定位的逐渐失效

• 批准号: 07305018
• 负责人: OKA Fusao
• 金额: $ 2.69万
• 依托单位: GIFU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07305018/
• 关键词: progressive failure; strain localization; slip surface; geo-structure; element test; model test; finite element method; 地盤; 進行性破壊; 局所化; 実験; 解析

Laboratory element tests as well as model tests have been carried out to investigate the change of microstructure of the geomaterials from the initail state to the failure state. The strain localization behavior were observed.Base on the experimental results, micromechanics-based constitutive models have been proposed. Then these models have been implemented in the numerical method.1) The nonlocal treatments of the constitutive models were proposed to avoid the ill-posedness of the governing equations in the numerical analyzes.2) The role of distinct element method has been investigated.3) The bifurcation theory and the mechanical behavior after the bifurcation point have been carefully investigated.4) Soil-water coupled finite element method has been proposed to simulate the mechanical behavior of geomaterials near/at critical state.

进行了室内单元试验和模型试验，研究了岩土材料从初始状态到破坏状态的微观结构变化。在实验结果的基础上，建立了基于细观力学的本构模型。在此基础上，采用数值方法对本构模型进行了非局部处理，避免了控制方程在数值分析中的不适定性。2)研究了离散元方法在数值分析中的作用。3)详细研究了分叉理论和分岔点后的力学行为。4)提出了土水耦合有限元方法来模拟岩土材料在临界点附近的力学行为。

项目成果

関口 秀雄: "遠心力場における進行波造波システムの開発とその適用" 京都大学防災研究所年報. 39・B-2. 15-26 (1996)

关口秀夫：“离心场行波发生系统的开发及其应用”京都大学防灾研究所年报39・B-2（1996）。

H.-B.Muhlhaus: "A Continuum Theory for Random Packings of Elastic Spheres" Proc. IUTAM Sympo. on Fracture of Brittle and Disordered Materials, Concrete, Rocks and Ceramics. 1. 285-298 (1995)

H.-B.Muhlhaus：“弹性球随机堆积的连续体理论”Proc。

関口 秀雄: "遠心力場における進行波造波システムの開発とその応用" 京都大学防災研究所年報. 39・B-2. 15-26 (1996)

关口秀夫：“离心场行波发生系统的开发及其应用”京都大学防灾研究所年报39・B-2（1996）。

YOSHIDA,Hidenori: "Micromechanics-based continuum model for rock masses and analysis of the excavation of underground power cavern" Proc. JSCE. No.535/3-34. 23-41 (1996)

吉田秀德：“基于微力学的岩体连续体模型及地下发电洞室开挖分析”，Proc.

吉田 秀典: "マイクロメカニクスに基づく岩盤の連続体モデルと大規模空洞掘削の解析" 土木学会論文集. III-34. 23-41 (1996)

Hidenori Yoshida：“基于微观力学的岩石连续体模型和大规模空腔开挖分析”日本土木工程师学会会刊 III-34（1996）。