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2015 Fiscal Year Annual Research Report

地盤災害予測のための拡張型相似則に基づく遠心力場での一斉実験・一斉解析

Research Project

Project/Area Number 26282103
Research InstitutionKyoto University

Principal Investigator

井合 進  京都大学, 防災研究所, 教授 (20359780)

Co-Investigator(Kenkyū-buntansha) 飛田 哲男  京都大学, 防災研究所, 准教授 (00346058)
菅野 高弘  国立研究開発法人港湾空港技術研究所, その他部局等, その他 (10187635)
東畑 郁生  関東学院大学, 理工学部, その他 (20155500)
竹村 次朗  東京工業大学, 理工学研究科, 准教授 (40179669)
渦岡 良介  徳島大学, ソシオテクノサイエンス研究部, 教授 (40333306)
岡村 未対  愛媛大学, 理工学研究科, 教授 (50251624)
一井 康二  広島大学, 工学(系)研究科(研究院), 准教授 (70371771)
太田 秀樹  中央大学, 公私立大学の部局等, 教授 (80026187)
Project Period (FY) 2014-04-01 – 2017-03-31
Keywords液状化 / 遠心力場 / 相似則 / 地盤流動 / 国際研究者交流
Outline of Annual Research Achievements

大地震時の液状化などの地盤災害を高精度に再現する遠心力場での空間・時間スケール縮小模型実験において,従来の縮尺の限界(50分の1)を超え,100~1000分の1の縮尺領域での新たな模型実験を可能とする拡張型相似則に基づいた地盤災害予測の高精度化を図ることを目的とする。このため,遠心力場での一斉実験(3研究機関による同時平行での同一模型の実験)および一斉解析(3研究機関による同時平行での同一模型実験の解析(ブラインド予測形式))による地盤災害予測を行うことにより,予測精度の飛躍的な高度化を図る。
平成27年度は,対象とする地盤・構造物系として,傾斜地盤中の杭基礎を対象とした一斉実験を実施した。地盤の液状化やこれに伴う流動変位が杭基礎に与える影響を計測し,これを相互比較することにより,地盤・構造物系の被害形態・被害程度の予測精度の向上を図った。仮想1g場の縮尺の変化に応じて,用いる杭模型の諸元も変化させたModelling of modelsの実験を実施した。計測項目としては,地盤に関する計測項目に加え,杭に発生する応力・ひずみの分布とその時系列的な変化を加えた。数値解析においては,平成26年度において実施した地盤系の解析結果を踏まえ,これに杭・地盤の動的相互作用が加えられた地盤・構造物系の挙動のブラインド予測のための枠組みについて,検討し,次年度の最終年度への研究へとつなげている。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

当初計画どおり,一斉実験を実施している。また,一斉解析のための枠組みについて,議論している。一部,一斉実験で,H28年度にフォローが必要な面がでてきており,これについて,複数の実験者・解析者が一同に会して,検討している。

Strategy for Future Research Activity

当初計画どおり,傾斜地盤中の杭基礎を対象とした一斉実験,一斉解析を実施し,最終とりまとめを行う予定である。

  • Research Products

    (26 results)

All 2016 2015

All Journal Article (15 results) (of which Peer Reviewed: 15 results,  Acknowledgement Compliant: 5 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 4 results) Book (4 results)

  • [Journal Article] Efficacy of pile-type improvement against lateral flow of liquefied ground2016

    • Author(s)
      H. Takahashi, N. Takahashi, Y. Morikawa, I. Towhata, D. Takano
    • Journal Title

      Geotechnique

      Volume: 0016-8505 Pages: 238-248

    • DOI

      10.1680/jgeot.14.P.238

    • Peer Reviewed
  • [Journal Article] Experimental evaluation of drainage pipes as a mitigation against liquefaction-induced settlement of structures2016

    • Author(s)
      Rouzbeh Rasouli, Ikuo Towhata
    • Journal Title

      Journal of Geotechnical and Geoenvironmental

      Volume: 査読中 Pages: 査読中

    • Peer Reviewed
  • [Journal Article] Site Specific Ground Response Analysis 1 and Liquefaction Assessment of Vijayawada City (India)2016

    • Author(s)
      Neelima D. Satyam,Ikuo Towhata
    • Journal Title

      Natural Hazards

      Volume: 81 Pages: 705-724

    • DOI

      10.1007/s11069-016-2166-7

    • Peer Reviewed
  • [Journal Article] Modeling of pre/post-liquefaction increase under cyclic loading2016

    • Author(s)
      Takeko Mikami, Koji Ichii, Kazuaki Uemura, Haruki Nishina
    • Journal Title

      Soils and Foundations

      Volume: 査読中 Pages: 査読中

    • Peer Reviewed
  • [Journal Article] On Ageing of Liquefaction Resistance of Sand2015

    • Author(s)
      Ikuo Towhata, Shigeru Goto, Yuichi Taguchi, Toshihiko Hayashida, Yuki Shintaku, Yuki Hamada
    • Journal Title

      日本地震工学会論文集

      Volume: 2 Pages: 800-805

    • DOI

      10.3208/jgssp.JPN-072

    • Peer Reviewed
  • [Journal Article] Centrifuge model test and flow analysis on mitigation effect of pile-type improvement against flow of liquefied ground (in Japanese)2015

    • Author(s)
      Naoki TAKAHASHI, Hidenori TAKAHASHI, Yoshiyuki MORIKAWA, Ikuo TOWHATA, Daiki TAKANO, Wakaki TSUDA
    • Journal Title

      Proc. JSCE B3 on Ocean Development

      Volume: 71-2 Pages: I_1119-I_1124

    • DOI

      10.2208/jscejoe.71.I_1119

    • Peer Reviewed
  • [Journal Article] Laboratory tests on cyclic undrained behavior of loose sand with cohesionless silt and its application to assessment of seismic performance of subsoil2015

    • Author(s)
      Yolanda Alberto Hernandez,Ikuo Towhata, Keigo Gunjia, Suguru Yamadab
    • Journal Title

      Soil Dynamics and Earthquake Engineering

      Volume: 79 PartB Pages: 365-378

    • DOI

      10.1016/j.soildyn.2015.09.004

    • Peer Reviewed
  • [Journal Article] 有機質土と粘性土および砂質土が互層状に堆積した軟弱地盤における真空圧密工法の適用性2015

    • Author(s)
      加藤真司・佐々木徹・山田満秀・澤野幸輝・齋藤邦夫・太田秀樹
    • Journal Title

      土木学会論文集C(地圏工学)

      Volume: 71 Pages: 335-351

    • DOI

      10.2208/jscejge.71.335

    • Peer Reviewed
  • [Journal Article] 津波と液状化の複合作用による杭基礎を有する建築物の転倒メカニズム2015

    • Author(s)
      飛田哲男, 井合進, 大内俊介
    • Journal Title

      自然災害科学

      Volume: 34-1 Pages: 23-39

    • Peer Reviewed
  • [Journal Article] New modelling of models for dynamic behavior of a pile foundation2015

    • Author(s)
      Tobita, T. and Iai, S.
    • Journal Title

      Japanese Geotechnical Society Special Publication

      Volume: 2-33 Pages: 1200-1203

    • DOI

      10.3208/jgssp.JPN-026

    • Peer Reviewed
  • [Journal Article] Strain Space Multiple Mechanism Model for Clay Under Monotonic and Cyclic Loads2015

    • Author(s)
      Iai,S., Ueda,K., Ozutsumi,O.
    • Journal Title

      6th International Conference on Earthquake Geotechnical Engineering

      Volume: 264 Pages: -

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Centrifuge model tests and large deformation analyses of a breakwater subject to combined effects of Tsunami2015

    • Author(s)
      Iai,S., Ueda, K. and Tobita, T.
    • Journal Title

      6th International Conference on Earthquake Geotechnical Engineering

      Volume: 801 Pages: -

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Two-dimensional Effective Stress Analysis on Consolidation of Clay under Highway Embankment and Its Seismic Response after Consolidation2015

    • Author(s)
      Ozutsumi,O., Iai,S., Nakahara,T.
    • Journal Title

      6th International Conference on Earthquake Geotechnical Engineering

      Volume: 300 Pages: -

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Over-turning of a building with pile foundation - combined effect of liquefaction and tsunami2015

    • Author(s)
      Tobita,T, and Iai,S.
    • Journal Title

      6th International Conference on Earthquake Geotechnical Engineering

      Volume: 291 Pages: -

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Finite Deformation Analysis of Dynamic Behavior of Embankment on Liquefiable Sand Deposit Considering Pore Water Flow and Migration2015

    • Author(s)
      Ueda, K., Iai,S., Ozutsumi,O.
    • Journal Title

      6th International Conference on Earthquake Geotechnical Engineering

      Volume: 215 Pages: -

    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Simplified and detailed analyses of retaining walls during earthquakes2016

    • Author(s)
      Iai, S.
    • Organizer
      Some Japanese Achievements in Geotechnical Engineering, The University of Auckland
    • Place of Presentation
      Auckland, New Zealand
    • Year and Date
      2016-03-16
    • Int'l Joint Research / Invited
  • [Presentation] Qualified evaluator of subsoil quality for safety of residential land2015

    • Author(s)
      Ikuo Towhata
    • Organizer
      International Conference on Soft Ground Engineering (ICSGE2015)
    • Place of Presentation
      Singapore (招待講演)
    • Year and Date
      2015-12-01
    • Int'l Joint Research / Invited
  • [Presentation] Centrifuge model tests and large deformation analyses of a breakwater subject to combined effects of Tsunami2015

    • Author(s)
      Iai, S.
    • Organizer
      6th International Conference on Earthquake Geotechnical Engineering
    • Place of Presentation
      Christchurch, New Zealand
    • Year and Date
      2015-11-01 – 2015-11-04
    • Int'l Joint Research / Invited
  • [Presentation] Qualification of residential land from the viewpoint of liquefaction vulnerability2015

    • Author(s)
      Ikuo Towhata
    • Organizer
      6th International Conference on Earthquake Geotechnical Engineering
    • Place of Presentation
      Christchurch (招待講演)
    • Year and Date
      2015-11-01
    • Int'l Joint Research / Invited
  • [Presentation] 関口・太田による弾・粘塑性構成モデルにおける応力緩和項の定式化について2015

    • Author(s)
      平田昌史・飯塚敦・太田秀樹
    • Organizer
      第50回地盤工学研究発表会(札幌)
    • Place of Presentation
      札幌
    • Year and Date
      2015-09-03
  • [Presentation] アーチ効果を受ける埋立地盤の相対密度と土圧の変化2015

    • Author(s)
      山田かりん、高町茉莉、一井康二、W-Y Hung
    • Organizer
      第50回地盤工学研究発表会
    • Place of Presentation
      北海道科学大学
    • Year and Date
      2015-09-02
  • [Presentation] 側方流動に関する拡張型相似則の検証2015

    • Author(s)
      白可, 飛田哲男, 井合進
    • Organizer
      平成27年度土木学会関西支部年次学術講演会, III-31
    • Place of Presentation
      摂南大学 寝屋川キャンパス
    • Year and Date
      2015-05-30
  • [Book] Benchmark centrifuge tests and analyses of liquefaction-induced lateral spreading during earthquake2015

    • Author(s)
      Tobita, T., Manzari, M., Ozutsumi, O., Ueda, K., Uzuoka, R., and Iai, S.
    • Total Pages
      264
    • Publisher
      Taylor & Francis Group, London
  • [Book] Geotechnics for Catastrophic Flooding Events2015

    • Author(s)
      Manzari, M.T. and Kutter, B.L. and Zeghal, M. and Iai, S. and Tobita, T. and Madabhushi, S.P.G. and Haigh, S.K. and Mejia, L. and Gutierrez, D.A. and Armstrong, R.J. and Sharp, M.K. and Chen, Y.M. and Zhou, Y.G.
    • Total Pages
      264
    • Publisher
      Taylor & Francis Group, London
  • [Book] Combined Failure Mechanism of a Breakwater Subject to Tsunami during 2011 East Japan Earthquake. In: Ansal A, Sakr M (Eds.), Perspectives on Earthquake Geotechnical Engineering in Honour of Prof. Kenji Ishihara.2015

    • Author(s)
      Iai, S.
    • Total Pages
      177-186
    • Publisher
      Springer
  • [Book] Backwards Problem in Geotechnical Earthquake Engineering. In: Rao V (Ed.), Forensic Geotechnical Engineering.2015

    • Author(s)
      Iai, S.
    • Total Pages
      1-10
    • Publisher
      Springer

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Published: 2017-01-06  

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