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Development and validation of a damage prediction method for reliquefaction taking into consideration the variation in induced anisotropy during liquefaction

Research Project

Project/Area Number 19H02402
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 25030:Disaster prevention engineering-related
Research InstitutionTohoku University

Principal Investigator

Yamada Shotaro  東北大学, 工学研究科, 准教授 (70346815)

Co-Investigator(Kenkyū-buntansha) 京谷 孝史  東北大学, 工学研究科, 教授 (00186347)
中野 正樹  名古屋大学, 工学研究科, 教授 (00252263)
淺岡 顕  公益財団法人地震予知総合研究振興会, 地震防災調査研究部, 副首席主任研究員 (50093175)
野田 利弘  名古屋大学, 工学研究科, 教授 (80262872)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2019: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords液状化 / 再液状化 / 水~土連成解析 / 弾塑性 / 動的解析 / 誘導異方性 / 弾塑性構成式 / 複合負荷 / 弾塑性力学
Outline of Research at the Start

本研究では,再液状化現象を含む液状化被害予測を高度に実現する技術を開発するとともに,開発した液状化・再液状化対策手法の有効性を検証し,より効果的な地盤改良法を提案することを目的とする.
これらの目的を研究機関内に実現するために,以下に示す項目を順次実行する.
1) 多様な土試料の液状化・再液状化特性の実験的把握と数理モデルの高度化・検証, 2) 数理モデルの水~土連成解析コードへの実装と模型実験を用いた精度検証, 3) 実地盤を対象とした液状化・再液状化現象のシミュレーション, 4) 液状化・再液状化リスクの評価スキームの構築, 5) 各種液状化対策効果の検証

Outline of Final Research Achievements

Based on laboratory element experiments, it was revealed that a systematic change in induced anisotropy occurs during liquefaction and that the state of anisotropy at the end of liquefaction significantly affects the re-liquefaction resistance. To numerically reproduce such liquefaction and re-liquefaction behavior of sandy soils, we proposed the combined loading elasto-plastic constitutive equation that integrates the SYS Cam-clay model and the Drucker-Prager model. The model is implemented in a dynamic soil-water coupled analysis code and is shown to explain various characteristics of liquefaction and re-liquefaction phenomena. Furthermore, this study demonstrated that the liquefaction countermeasures using the permeation grouting method could be evaluated based on the developed analysis theory.

Academic Significance and Societal Importance of the Research Achievements

液状化被害を受けた地区に住む人々は,またいつ訪れるかわからない地震による再液状化被害に常に不安を憶えながら生活を営んでいる.また,当該地区は人口流出現象にも直面している.これらの不安を軽減するために様々な液状化対策工法が提案されているが,その効果を定量的に予測するのは難しい.本研究では,誘導異方性に着目して再液状化現象の主要なメカニズムを明らかにするとともに,砂質土の誘導異方性の変化を考慮可能な数理モデルを開発した.さらには,提案モデルを水~土連成解析コードに実装し,液状化対策効果の評価に適用可能であることを例証した.

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (23 results)

All 2023 2022 2021 2020 2019

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (17 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Finite-Deformation Cam-Clay Model Considering Elastic Dilatancy and Soil Skeleton Structure2023

    • Author(s)
      Yamada Shotaro、Noda Toshihiro
    • Journal Title

      International Journal of Geomechanics

      Volume: 23 Issue: 2 Pages: 04022289-04022289

    • DOI

      10.1061/ijgnai.gmeng-7117

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] SOIL-WATER COUPLED ANALYSIS METHOD WITH CAM-CLAY MODEL BASED ON MULTIPLICATIVE DECOMPOSITION OF DEFORMATION GRADIENT2022

    • Author(s)
      KUBOTA Tomoya、YAMADA Shotaro、KYOYA Takashi
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering)

      Volume: 78 Issue: 3 Pages: 251-260

    • DOI

      10.2208/jscejge.78.3_251

    • ISSN
      2185-6516
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Finite Element Analysis of Expansive Bedrock Considering Electro-chemo-mechanical Coupling Phenomena in Crystal Layers of Clay Minerals and Internal Structural Degradation2022

    • Author(s)
      Hoshi Keitaro、Yamada Shotaro、Kyoya Takashi
    • Journal Title

      Rock Mechanics and Rock Engineering

      Volume: 55 Issue: 12 Pages: 7387-7407

    • DOI

      10.1007/s00603-022-02997-3

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Method to Introduce the Cementation Effect into Existing Elastoplastic Constitutive Models for Soils2022

    • Author(s)
      Yamada Shotaro、Sakai Takayuki、Nakano Masaki、Noda Toshihiro
    • Journal Title

      Journal of Geotechnical and Geoenvironmental Engineering

      Volume: 148 Issue: 5

    • DOI

      10.1061/(asce)gt.1943-5606.0002727

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Combined-loading elastoplastic constitutive model for a unified description of the mechanical behavior of the soil skeleton2022

    • Author(s)
      Yamada Shotaro、Noda Toshihiro、Nakano Masaki、Asaoka Akira
    • Journal Title

      Computers and Geotechnics

      Volume: 141 Pages: 104521-104521

    • DOI

      10.1016/j.compgeo.2021.104521

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 変形勾配の乗算分解型有限変形理論に基づくCam-clay modelの定式化とF-bar法による体積ロッキング現象の回避2021

    • Author(s)
      窪田友也,山田正太郎,松原誠志朗,京谷孝史
    • Journal Title

      計算工学会論文集

      Volume: 2021 Pages: 20210001-20210001

    • NAID

      130007968866

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Reconstruction of isotropic Cam-clay model based on finite deformation theory2023

    • Author(s)
      Abe, Y., Yamada, S., Kyoya, T.
    • Organizer
      17th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reconstruction of Cam-clay model based on finite deformation theory guaranteeing the existence of the state boundary surface2023

    • Author(s)
      Abe, Y., Yamada, S., Hoshi, K., Kyoya, T.
    • Organizer
      XVII International Conference on Computational Plasticity
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 変形勾配の乗算分解理論に基づく等方性Cam-clay modelの再構築2022

    • Author(s)
      阿部悠太, 山田正太郎, 京谷孝史
    • Organizer
      令和3年度土木学会東北支部技術研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 動的問題における陰的Runge-Kutta法による時間積分法の構築および検証2022

    • Author(s)
      米田玄徳, 山田正太郎, 京谷孝史
    • Organizer
      計算工学講演会論文集
    • Related Report
      2021 Annual Research Report
  • [Presentation] Eshelby-zeta 応力を用いた有限変形等方性 Cam-clay model の構築2022

    • Author(s)
      阿部悠太, 山田正太郎, 京谷孝史
    • Organizer
      計算工学講演会論文集
    • Related Report
      2021 Annual Research Report
  • [Presentation] 変形勾配の乗算分解型等方性 Cam-clay model の再構築2022

    • Author(s)
      阿部悠太, 山田正太郎, 京谷孝史
    • Organizer
      第57回地盤工学研究発表会講演概要集
    • Related Report
      2021 Annual Research Report
  • [Presentation] Reconstruction of isotropic Cam-clay model based on multiplicative decomposition of deformation gradient2022

    • Author(s)
      Abe, Y., Yamada, S., Kyoya, T.
    • Organizer
      15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cam-clay model を用いた有限変形解析における体積ロッキング現象の回避に関する検討2020

    • Author(s)
      窪田友也, 京谷孝史, 山田正太郎, 松原成志朗
    • Organizer
      第75回土木学会年次学術講演会講演概要集
    • Related Report
      2020 Annual Research Report
  • [Presentation] 微小変形理論に基づく Cam-clay modelの陰的応力更新アルゴリズムの構築2020

    • Author(s)
      小松龍之介, 山田正太郎, 京谷孝史, 松原成志朗, 劉暁東
    • Organizer
      第75回土木学会年次学術講演会講演概要集
    • Related Report
      2020 Annual Research Report
  • [Presentation] Reproduction of shear behavior of fiber-reinforced Toyoura sand by SYS Cam-clay model2020

    • Author(s)
      Ganiev, J., Masaki, N. and Shotaro, Y.
    • Organizer
      第55回地盤工学研究発表会講演概要集
    • Related Report
      2020 Annual Research Report
  • [Presentation] Numerical analysis of the mechanical behavior of a tunnel excavated in swelling rockmass2020

    • Author(s)
      Xiaodong LIU, Seishiro MATUBARA, Syotaro YAMADA, Takashi KYOYA
    • Organizer
      第47 回岩盤力学に関するシンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] Cam-clay model を用いた有限変形解析における体積ロッキング現象の回避に関する検討2020

    • Author(s)
      窪田友也, 山田正太郎,京谷孝史, 松原誠志朗
    • Organizer
      計算工学講演会論文集
    • Related Report
      2020 Annual Research Report
  • [Presentation] 変形勾配の弾塑性乗算分解に基づく有限変形解析コードの開発とその精度検証2020

    • Author(s)
      窪田友也, 山田正太郎, 京谷孝史, 松原誠志朗
    • Organizer
      令和元年度土木学会東北支部技術研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 亜弾性構成則に基づくCam-clay modelの陰的応力更新アルゴリズムの構築2020

    • Author(s)
      小松龍ノ介, 山田正太郎, 京谷孝史, 松原誠志朗, 劉暁東
    • Organizer
      令和元年度土木学会東北支部技術研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] A Proposal of Combined Loading Elasto-plastic model2019

    • Author(s)
      Shotaro Yamada, Toshihiro Noda, Masaki Nakano and Akira Asaoka
    • Organizer
      Asian Pacific Congress on Computational Mechanics
    • Related Report
      2019 Annual Research Report
  • [Presentation] Basic study on the anisotropy of sand by using hollow cylindrical torsional shear apparatus2019

    • Author(s)
      Yamada, S. and Nakano, M.
    • Organizer
      Proc. of 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 複合負荷弾塑性構成式への誘導異方性の新たな発展則の導入と妥当性の検証2019

    • Author(s)
      山田正太郎, 野田利弘, 中野正樹, 浅岡顕
    • Organizer
      第54回地盤工学研究発表会講演概要集
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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