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Micromechanics Study on Liquefaction-Induced Lateral Flow and Soil-Pile Interaction

Research Project

Project/Area Number 15360249
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geotechnical engineering
Research InstitutionUniversity of Tsukuba

Principal Investigator

YAMADA Yasuo  University of Tsukuba, Graduate School of Systems and Information Engineering, Professor, 大学院・システム情報工学研究, 教授 (90111476)

Co-Investigator(Kenkyū-buntansha) MATSUSHIMA Takashi  University of Tsukuba, Graduate School of Systems and Information Engineering, Associate Professor, 大学院・システム情報工学研究, 助教授 (60251625)
SAKAKIBARA Jun  University of Tsukuba, Graduate School of Systems and Information Engineering, Associate Professor, 大学院・システム情報工学研究, 助教授 (10292533)
KONAGAI Kazuo  University of Tokyo, Institute of Industrial Science, Professor, 生産技術研究所, 教授 (50126471)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥14,700,000 (Direct Cost: ¥14,700,000)
Fiscal Year 2005: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2004: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2003: ¥8,300,000 (Direct Cost: ¥8,300,000)
KeywordsLiquefaction / Lateral ground flow / Visualization technique / PIV (particle image Velocimetry) / LAT (Laser-Aided tomography) / DEM (Discrete Element Method) / SPH (Smoothed Particle Hydrodynamics) / Micromechanics / 杭基礎 / 微視力学 / 構成則 / 流動 / 個別要素法
Research Abstract

Lateral spreading induced by seismic liquefaction causes the ground to experience large displacement and shear strains, which in turn damage pile foundations due to the drag force. There are two difficulties in simulating this problem ; the evaluation of constitutive model for liquefied soil and the choice of adequate simulation tool suitable for such large deformation problem. The objective of this study is to find a way for these difficulties from a micromechanical standpoint.
Firstly, we developed some experimental techniques using high-speed camera and PIV (Particle Image Velocimetry). PIV is a powerful tool to detect a velocity field of various experiments from sequential digital images. We performed two types of experiments : one is a shaking table test of Toyoura sand to observe a surface of small-sized ground model, and the other is a kind of permeability test to keep arbitrary liquefaction state by tuning a fluid injection speed from the bottom of the specimen. In both experime … More nts, a cylindrical pipe is installed to measure the drag force acting on it due to the relative displacement between the specimen and the pipe. It was found that the liquefied soil has both properties as a solid (detected by a stick-slip motion between the soil and the pile) and as a viscous fluid (characterized by the rate dependent response).
Further investigation was made by DEM (Discrete Element Method). DEM is a simulation method to compute each solid grains based on Newton's second law of motion, and the interaction between grains is simply modeled by a spring-dashpot-slider system. A series of constant-volume simple shear simulations provided us to observe essential micro-mechanisms up to and after liquefaction. In particular, the re-solidification of liquefied soil was also successfully simulated, which is quite important factor to predict the lateral flow displacement due to liquefaction.
Based on the above information, we proposed a constitutive model of granular assembly based on micromechanics, which can be well applied up to shear failure of the assembly.
Finally, we studied SPH (Smoothed Particle Hydrodynamics), a particle-based simulation method for continuum, which can be applied both in solid and fluid. It was found that the pile-liquefied soil interaction including the re-solidification regime was successfully simulated by SPH. Less

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (28 results)

All 2006 2005 2004 Other

All Journal Article (23 results) Publications (5 results)

  • [Journal Article] An elasto-plastic constitutive model of granular materials based on contact force distribution2006

    • Author(s)
      松島亘志
    • Journal Title

      IS-Yamagushi(International Symposium on Geomechanics and Geotechnics of Particulate Media)) (発表予定)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] An elasto-plastic constitutive model of granular materials based on contact force distribution,2006

    • Author(s)
      Matsushima, T., Chang, C.-S.
    • Journal Title

      IS-Yamagushi (International Symposium on Geomechanics and Geotechnics of Particulate Media)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Liquefaction induced lateral ground displacements : Numerical investigation using SPH2006

    • Author(s)
      Mounir NAILI
    • Journal Title

      Proc.11th International Conference of IACMAG 3

      Pages: 289-296

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A 2D Smoothed Particle Hydrodynamics method for liquefaction induced lateral spreading analysis2005

    • Author(s)
      Mounir NAILI
    • Journal Title

      土木学会 応用力学論文集 8

      Pages: 591-599

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] LAT- PIV 可視化実験手法の開発と粒子-流体系への応用2005

    • Author(s)
      竿本英貴
    • Journal Title

      土木学会 応用力学論文集 8

      Pages: 601-608

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Liquefaction induced lateral ground displacements : Numerical investigation using SPH2005

    • Author(s)
      Mounir NAILI
    • Journal Title

      Proc. 11IACMAG 3

      Pages: 289-296

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Smoothed particles hydrodynamics for numerical simulation of soil-structure problem due to liquefaction2005

    • Author(s)
      Mounir NAILI
    • Journal Title

      第40回地盤工学研究発表会講演概要集 (CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] マイクロメカニックス構成モデルの個別要素法解析による検証2005

    • Author(s)
      松島亘志
    • Journal Title

      第40回地盤工学研究発表会講演概要集 (CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] A 2D Smoothed Particle Hydrodynamics method for liquefaction induced lateral spreading analysis2005

    • Author(s)
      Naili, M., Matsushima, T., Yamada, Y.
    • Journal Title

      Journal of Applied Mechanics, JSCE Vol.8

      Pages: 591-599

    • NAID

      130004258326

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] LAT-PIV Visualization technique and Application to solid particle-fluid interaction2005

    • Author(s)
      Hidetaka Saomoto, Takashi Matsushima, Yasuo Yamada
    • Journal Title

      Journal of Applied Mechanics, JSCE (in Japanese) Vol.8

      Pages: 601-608

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Liquefaction induced lateral ground displacements : Numerical investigation using SPH,2005

    • Author(s)
      Naili, M., Matsushima, T., Yamada, Y.
    • Journal Title

      Proc.11IACMAG vol.3

      Pages: 289-296

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Smoothed particles hydrodynamics for numerical simulation of soil-structure problem due to liquefaction,2005

    • Author(s)
      Naili, M., Matsushima, T., Yamada, Y.
    • Journal Title

      40th annual congress on soil mechanics and geotechnical engineering (CD-ROM)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Evaluation of Micromechanics constitutive model using DEM simulation2005

    • Author(s)
      Takashi Matushima
    • Journal Title

      40th annual congress on soil mechanics and geotechnical engineering (CD-ROM)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A 2D Smoothed Particle Hydrodynamics method for liquefaction induced lateral spreading analysis2005

    • Author(s)
      Mounir NAILI
    • Journal Title

      応用力学論文集,土木学会 8

      Pages: 591-599

    • Related Report
      2005 Annual Research Report
  • [Journal Article] LAT-PIV可視化実験手法の開発と粒子-流体系への応用2005

    • Author(s)
      竿本英貴
    • Journal Title

      応用力学論文集,土木学会 8

      Pages: 601-608

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Smoothed particles hydrodynamics for numerical simulation of soil-structure problem due to liquefaction2005

    • Author(s)
      Mounir NAM
    • Journal Title

      第40回地盤工学研究発表会講演概要集 (CD-ROM)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] SPH-DEM手法の開発とボイリング現象への適用2005

    • Author(s)
      竿本英貴
    • Journal Title

      第40回地盤工学研究発表会講演概要集 (CD-ROM)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Numerical Simulation of Liquefaction Induced Lateral Ground Displacements using Smoothed Particles Hydrodynamics2005

    • Author(s)
      Mounir NAILI
    • Journal Title

      日本地震工学会大会2004梗概集

      Pages: 400-401

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Liquefaction induced lateral ground displacements : Numerical investigation using SPH2005

    • Author(s)
      Mounir NAILI
    • Journal Title

      Proc.11th International Conference of IACMAG (発表予定)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] SPH-DEM手法の開発とボイリング現象への適用2005

    • Author(s)
      竿本英貴
    • Journal Title

      第40回地盤工学研究発表会講演概要集 (発表予定)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Smoothed particles hydrodynamics for numerical simulation of soil-structure problem due to liquefaction2005

    • Author(s)
      Mounir NAILI
    • Journal Title

      第40回地盤工学研究発表会講演概要集 (発表予定)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] マイクロメカニックス構成モデルの個別要素法解析による検証2005

    • Author(s)
      松島亘志
    • Journal Title

      第40回地盤工学研究発表会講演概要集 (発表予定)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] ボイリング時における粒子-流体系内部の可視化と速度場計測2004

    • Author(s)
      竿本英貴
    • Journal Title

      第39回地盤工学研究発表会講演概要集

      Pages: 1239-1240

    • Related Report
      2004 Annual Research Report
  • [Publications] Matsushima, T.: "Grain Rotation versus Continuum Rotation during shear Deformation of Granular Assemby"Soils and Foundations. 43・4. 95-106 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Saomoto, H.: "Direct Simulation and Experimental Observation of Particle-Fluid System"Proc.16th Engineering Mechanics Conference, ASCE. (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Matsushima, T.: "Direct Element Simulation of an Assembly of Irregularly-Shaped Grains"Proc.16th Engineering Mechanics Conference ASCE. (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 松本 優明: "液状化に伴う流動におけるミクロ構造の個別要素法解析"第38回地盤工学研究発表会. (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 竿本 英貴: "デジタル画像を利用した粒子-流体系内部の速度場計測"土木学会第58回年次学術講演会. (2003)

    • Related Report
      2003 Annual Research Report

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

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