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Establishment of strain softening elasto-visco-plastic constitutive model and studies on the progressive failure of ground material

Research Project

Project/Area Number 12450191
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geotechnical engineering
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

ADACHI Toshihisa  Kyoto University, School of Engineering, Professor, 工学研究科, 教授 (20026173)

Co-Investigator(Kenkyū-buntansha) MIMURA Mamoru  Kyoto University, Disaster Prevention Research Institute, Associate Professor, 防災研究所, 助教授 (00166109)
TATEYAMA Kazuyoshi  Kyoto University, School of Engineering, Associate Professor, 工学研究科, 助教授 (10179731)
OKA Fusao  Kyoto University, School of Engineering, Professor, 工学研究科, 教授 (10111923)
KODAKA Takeshi  Kyoto University, School of Engineering, Associate Professor, 工学研究科, 助教授 (00252271)
木村 亮  京都大学, 工学研究科, 助教授 (30177927)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 2001: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2000: ¥4,700,000 (Direct Cost: ¥4,700,000)
KeywordsProgressive failure / Strain softening / Centrifuge modeling tests / Finite element analysis / Soil-water coupling analysis / Soft rock / Constitutive model / Time dependency / 地盤材料の構成式 / 軟岩および過圧密粘土 / 時間依存性 / 劣化挙動 / モデル斜面 / 画像処理
Research Abstract

By the centrifuge modeling tests and the finite element analyses, the purposes of this research work are to establish the constitutive model which can expresses both strain-softening and time dependency behavior of soft rock and over-consolidated clay, to discuss the stability of the slope which consists of soft rock and/or over-consolidated clay, and then to grasp the mechanism of the progressive failure. Moreover, it is considered that the time dependency behavior of soft rock is equivalent to the change of the effective stress with the change of pore pressure, the constitutive model is applied to the boundary value problem as the water-coupling problem. Then, the constitutive model with soil-water coupling is also applied to the collapse of the slope.
The remarkable mechanical behavior of soft rock and over-consolidated clay can be presented by the strain hardening and softening in the stress - strain relation and the positive dilation with progressed the strain softening. In this re … More search work, the elasto-plastic constitutive model with strain softening whose yielding function is defined by the stress-history tensor are established.
In the centrifuge modeling tests, the modeling ground makes of mixed Gypsum to Fukakusa clay. Displacement vectors and strain vectors are observed and estimated through the movement of the targets installed in the modeling ground, and then the mechanism of the progressive failure of the slope is discussed.
Various parameters of the proposed constitutive model are determined through the element experiments, and then the finite element soil-water coupling analyses are carried out to simulate the progressive failure of the slope. As compared the numerical simulations with the experimental results, the progressive failure of the slope is discussed.
Finally, actual progressive failure of cutting slope in the sedimentary mudstone is simulated by the soil-water coupled analysis based on the elasto-plastic constitutive model with strain softening. Compared the actual collapse with the numerical results, the validity and the problem of the proposed model are discussed. Less

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 足立 紀尚 他: "ひずみ軟化挙動を呈する切土斜面の進行性破壊に関する実験的研究"平成13年度土木学会関西支部年次学術講演会講演概要. 51-1 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 足立 紀尚 他: "過圧密粘土地盤を用いた斜面の進行性破壊に関する遠心載荷試験"第36会地盤工学研究会発表会 平成13年度発表講演集. 1029-1030 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Toshihisa Adachi et al.: "Progressive failure of cut slope in anisotropic ground"Computer Methods and Advances in Geomechanics. 1531-1535 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Toshihisa Adachi et al.: "SOIL-WATERCOUPLEDANALYSISOFOUTSLOPESTABILITYWITHELASTO-VISCOPLASTICMODEL"Computational Mechanics-New Frontiers for New Millennium. 307-316 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 足立 紀尚 他: "遠心載荷装置を用いた斜面の崩壊挙動に関する研究"(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 足立 紀尚 他: "ひずみ軟化型弾塑性構成式を用いた泥岩切土斜面崩壊に関する研究"(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Toshihisa ADACHI et al.: "Progressive failure of cut slope in aniso tropic ground Computer Methods and Advances in Geomechanics"Computer Methods and Advances in Geomechanics. 1531-1535 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Toshihisa ADACHI et al.: "SOIL-WATER COUPLED ANALYSIS OF CUT SLOPE STABILITY WITH ELASTO-VISCOPLASTIC MODEL"Computational Mechanics- New Frontiers for New Millennium. 307-316 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 足立 紀尚 他: "ひずみ軟化挙動を呈する切土斜面の進行性破壊に関する実験的研究"平成13年度土木学会関西支部年次学術講演会講演概要. 51-51 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 足立 紀尚 他: "過圧密粘土地盤を用いた斜面の進行性破壊に関する遠心載荷試験"第36会地盤工学研究会発表会 平成13年度発表講演集. 1029-1030 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Toshihisa Adachi et al.: "Progressive failure of cut slope in anisotropic ground"Computer Methods and Advances in Geomechanics. 1531-1535 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Toshihisa Adachi et al.: "SOIL-WATER COUPLED ANALYSIS OF OUT SLOPE STABILITY WITH ELASTO-VISCOPLASTIC MODEL"Computational Mechanics-New Frontiers for New Millennium. 307-316 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 足立 紀尚 他: "遠心載荷装置を用いた斜面の崩壊挙動に関する研究"(印刷中).

    • Related Report
      2001 Annual Research Report
  • [Publications] 足立 紀尚 他: "ひずみ軟化型弾塑性構成式を用いた泥岩切土斜面崩壊に関する研究"(印刷中).

    • Related Report
      2001 Annual Research Report
  • [Publications] 足立紀尚,木村亮 他: "過圧密粘土地盤を用いた斜面の進行性破壊に関する遠心載荷実験"第36回地盤工学会研究発表会発表講演集. (印刷中). (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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