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Development of Element tests for elucidating mechanical behavior of granular materials subjected to cyclic moving loads

Research Project

Project/Area Number 15560420
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

ISHIKAWA Tatsuya  Hokkaido Univ., Grad.School of Eng., Asso.Prof., 大学院・工学研究科, 助教授 (60359479)

Co-Investigator(Kenkyū-buntansha) MIURA Seiichi  Hokkaido Univ., Grad.School of Eng., Prof., 大学院・工学研究科, 教授 (00091504)
YOKOHAMA Shoji  Hokkaido Univ., Grad.School of Eng., Inst., 大学院・工学研究科, 助手 (50299731)
SEKINE Etsuo  Railway Technical Research Institute, Laboratory Track Technology Division, Track Structures & Geotechnology Laboratory Head, 軌道技術研究部・軌道路盤研究室, 室長(研究職)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2004: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2003: ¥2,200,000 (Direct Cost: ¥2,200,000)
KeywordsMoving Load / Granular Materials / Shear Test / Roadbed, Subgrade / Gravel / Cyclic Plasticity / Rotation of Principal Stress Axes / Numerical Analysis / 鉄道
Research Abstract

This study examines the mechanical behavior of granular materials subjected to cyclic moving loads, for example gravel roadbed and railroad ballast, and both a new testing method and new analytical procedures to examine the effects of the rotation of principal stress axes on cyclic plastic deformation of granular materials are proposed. The following conclusions can be obtained ;
1.Cyclic plastic deformation obtained through moving loading tests is much larger than those obtained through fixed-place cyclic loading tests when other experimental conditions are the same. Accordingly, the difference in loading methods has a significant influence on the cyclic plastic deformation of granular materials.
2.Residual strain obtained through cyclic loading triaxial tests with constant amplitude of deviator stress while controlling confining pressure constant is very small compared with the macro residual strain calculated from force-displacement relationships in moving loading tests, while that of … More cyclic torsional simple shear tests using a newly developed "Multi-ring shear apparatus" is almost equivalent to moving loading tests. Therefore, the multi-ring shear test is appropriate for an element test to simulate the actual stress states inside substructures under traffic loads. Moreover, it was revealed that the rotation of principal stress axes has a significant effect on cyclic deformation characteristics of granular materials.
3.Two analytical procedures for simulating the mechanical behavior of granular materials subjected to cyclic moving loads were proposed. One is linear elastic FE analysis considering the material properties of cumulative strain derived from element test results of granular materials, which can roughly estimate the residual settlement of granular substructures due to cyclic loading. The other is discontinuous analysis which elements imitate the shape of real gram particles well because it was revealed that the element shape is one of the dominant factors to determine the mechanical behavior of granular assemblage in discontinuous analysis. Less

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (19 results)

All 2005 2004 Other

All Journal Article (14 results) Publications (5 results)

  • [Journal Article] Evaluation of the effect of particle shape on the bearing capacity of railroad ballast with discontinuous analysis2005

    • Author(s)
      石川達也
    • Journal Title

      Proceedings of the 7th International Conference on the Bearing Capacity of Roads, Railways and Airfields

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 多重リングせん断試験機による単粒度砕石の繰返し変形挙動の検討2005

    • Author(s)
      石川達也
    • Journal Title

      地盤工学会北海道支部技術報告集 第45号

      Pages: 105-114

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Evaluation of the effect of particle shape on the bearing capacity of railroad ballast with discontinuous analysis2005

    • Author(s)
      ISHIKAWA, Tatsuya
    • Journal Title

      Proceedings of the 7th International Conference on the Bearing Capacity of Roads, Railways and Airfields

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 多重リングせん断試験機による単粒度砕石の繰返し変形挙動の検討2005

    • Author(s)
      石川達也, 関根悦夫, 杉山圭大, 三浦清一
    • Journal Title

      第45回地盤工学研究発表会講演集

      Pages: 105-114

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 多重式リングせん断試験機による砕石の繰返し変形挙動に及ぼす主応力回転の影響の検討2005

    • Author(s)
      杉山圭大, 石川達也, 三浦清一, 関根悦夫
    • Journal Title

      第40回地盤工学研究発表会講演集 (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 不連続変形法による模型バラスト軌道の支持力解析2005

    • Author(s)
      小林慶祐, 石川達也, 三浦清一, 関根悦夫
    • Journal Title

      第40回地盤工学研究発表会講演集 (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 列車荷重を受けるバラスト軌道の塑性変形に及ぼす路盤剛性の影響2005

    • Author(s)
      関根悦夫, 河野昭子, 村本勝己, 石川達也
    • Journal Title

      第40回地盤工学研究発表会講演集 (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Evaluation of the effect of particle shape on the hearing capacity of railroad ballast with discontinuous analysis2005

    • Author(s)
      石川達也, 関根悦夫, 小林慶祐, 大西有三
    • Journal Title

      Proceedings of the 7th International Conference on the Bearing Capacity of Roads, Railways and Airfields (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] An Estimation Method of Residual Settlement in Ballasted Track under Repeated Moving Loads2004

    • Author(s)
      石川達也
    • Journal Title

      Proceedings of CBS04

      Pages: 633-640

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 各種離散化解析手法による模型バラスト軌道の繰返し塑性変形挙動解析2004

    • Author(s)
      石川達也
    • Journal Title

      地盤工学会北海道支部技術報告集 第44号

      Pages: 321-330

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 粗粒材料を対象とした単純せん断試験機の試作と性能評価2004

    • Author(s)
      石川達也
    • Journal Title

      第39回地盤工学研究発表会講演集

      Pages: 863-864

    • NAID

      130004622823

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 道床バラストの繰返し塑性変形に及ぼす移動荷重の影響2004

    • Author(s)
      関根悦夫
    • Journal Title

      鉄道総研報告 18・3

      Pages: 17-22

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] An Estimation Method of Residual Settlement in Ballasted Track under Repeated Moving Loads2004

    • Author(s)
      ISHIKAWA, Tatsuya
    • Journal Title

      Proceedings of CBS04

      Pages: 633-640

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] せん断モードの異なる破砕性粒状体の強度-変形特性2004

    • Author(s)
      石川達也, 堀田大介, 三浦清一, 柏谷匡胤
    • Journal Title

      土木学会第59回年次学術講演会講演概要集 III-011

      Pages: 21-22

    • Related Report
      2004 Annual Research Report
  • [Publications] 石川 達也, 関根 悦夫, 河野 昭子, 三浦 清一: "An Estimation Method of Residual Settlement in Ballasted Track under Repeated Moving Loads"Proceedings of CBS04. (未定). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 石川 達也, 関根 悦夫, 河野 昭子, 小林 慶祐: "各種離散化解析手法による模型バラスト軌道の繰返し塑性変形挙動解析"地盤工学会北海道支部技術報告集. 第44号. 321-330 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 関根 悦夫, 石川 達也, 河野 昭子: "列車荷重を受けるバラスト軌道の繰返し塑性変形に及ぼすバラスト厚さの影響"第39回地盤工学研究発表会講演集. (未定). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 石川 達也, 堀田 大介, 柏谷 匡胤, 三浦 清一: "粗粒材料を対象とした単純せん断試験機の試作と性能評価"第39回地盤工学研究発表会講演集. (未定). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 関根 悦夫, 石川 達也, 木幡 行宏: "道床バラストの繰返し塑性変形に及ぼす移動荷重の影響"鉄道総研報告. 18・3. 17-22 (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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