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2018 Fiscal Year Research-status Report

地盤-都市系の連成地震応答解析手法の開発

Research Project

Project/Area Number 17K14719
Research InstitutionThe University of Tokyo

Principal Investigator

藤田 航平  東京大学, 地震研究所, 助教 (00744856)

Project Period (FY) 2017-04-01 – 2020-03-31
Keywords有限要素法 / 高性能計算 / 地震応答解析
Outline of Annual Research Achievements

高層ビル・インフラ・地下街などが複雑に入り組む都市においては,地震時に複雑な波動場が生じ,構造物を個々に評価した際には見られない地震応答が発生する可能性がある.このような特性の評価には,地盤-都市系の詳細な3次元連成解析を使うことが合理的である.そこで本研究では,デジタル都市データから地盤と地下・地上構造物群の高詳細3Dモデルを自動構築する手法,及び,地震応答解析の高性能計算手法を開発し,スーパーコンピュータを使った連成地震応答解析を行う.平成30年度においては,地盤と地下・地上構造物群の高詳細3D有限要素モデル構築手法の改良,及び,高速非線形地震応答解析手法を開発した.まず,平成29年度までに開発した高詳細3D有限要素モデル構築手法において,生成されたメッシュの形状修正を行えるように改良した.これにより,応力・ひずみの収束が担保できる大規模メッシュを高速に構築できるようになった.次に,平成29年度までに開発した線形地震応答解析手法を非線形解析に拡張した.これにより,SIMDアーキテキチュアベースのCPUを搭載した計算機において非線形地震応答解析の高速化を達成した.

Current Status of Research Progress
Current Status of Research Progress

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

Reason

研究計画で平成30年度に行うとしていたメッシュ生成手法,及び,高速地震応答解析手法の開発の目途がついたため.

Strategy for Future Research Activity

平成30年度までに開発した高詳細3D有限要素モデル構築手法,及び,高速地震応答解析手法を用いて,実際の都市における地盤・構造物の連成解析を行う計画である.

Causes of Carryover

平成30年度の研究において出力されたデータサイズが想定よりも少なかったため,計画していたファイルサーバの購入を次年度に延期した.

  • Research Products

    (13 results)

All 2019 2018

All Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 8 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Rapid mantle flow with power-law creep explains deformation after the 2011 Tohoku mega-quake2019

    • Author(s)
      Ryoichiro Agata, Sylvain D. Barbot, Kohei Fujita, Mamoru Hyodo, Takeshi Iinuma, Ryoko Nakata, Tsuyoshi Ichimura, Takane Hori
    • Journal Title

      Nature Communications

      Volume: 10 Pages: -

    • DOI

      10.1038/s41467-019-08984-7

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A point-estimate based method for soil amplification estimation using high resolution model under uncertainty of stratum boundary geometry2018

    • Author(s)
      Kahori Iiyama, Atsushi Yoshiyuki, Kohei Fujita, Tsuyoshi Ichimura, Hitoshi Morikawa, Muneo Hori
    • Journal Title

      Soil Dynamics and Earthquake Engineering

      Volume: - Pages: -

    • DOI

      https://doi.org/10.1016/j.soildyn.2018.11.028

    • Peer Reviewed
  • [Journal Article] A Fast Scalable Implicit Solver for Nonlinear Time-Evolution Earthquake City Problem on Low-Ordered Unstructured Finite Elements with Artificial Intelligence and Transprecision Computing2018

    • Author(s)
      Tsuyoshi Ichimura, Kohei Fujita, Takuma Yamaguchi, Akira Naruse, Jack C. Wells, Thomas C. Schulthess, Tjerk P. Straatsma, Christopher J. Zimmer, Maxime Martinasso, Kengo Nakajima, Muneo Hori, Lalith Maddegedara
    • Journal Title

      SC '18 Proceedings of the International Conference for High Performance Computing, Networking, Storage, and Analysis

      Volume: - Pages: -

    • DOI

      http://dl.acm.org/citation.cfm?id=3291656.3291722

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Development of Three-Dimensional Soil-Amplification Analysis Method for Screening for Seismic Damage to Buried Water-Distribution Pipeline Networks2018

    • Author(s)
      Kohei Fujita, Tsuyoshi Ichimura, Motoki Kazama, Susumu Ohno and Shingo Sato
    • Journal Title

      Geosciences

      Volume: 8 Pages: -

    • DOI

      https://doi.org/10.3390/geosciences8050170

    • Peer Reviewed / Open Access
  • [Journal Article] Development of Octree-Based High-Quality Mesh Generation Method for Biomedical Simulation2018

    • Author(s)
      Keisuke Katsushima, Kohei Fujita, Tsuyoshi Ichimura, Muneo Hori and Lalith Maddegedara
    • Journal Title

      Computational Science - ICCS 2018. ICCS 2018. Lecture Notes in Computer Science

      Volume: 10861 Pages: -

    • DOI

      doi: 10.1007/978-3-319-93701-4_27

    • Peer Reviewed
  • [Journal Article] Development of scalable three-dimensional elasto-plastic nonlinear wave propagation analysis method for earthquake damage estimation of soft grounds2018

    • Author(s)
      Atsushi Yoshiyuki, Kohei Fujita, Tsuyoshi Ichimura, Muneo Hori and Lalith Wijerathne
    • Journal Title

      Computational Science - ICCS 2018. ICCS 2018. Lecture Notes in Computer Science,

      Volume: 10861 Pages: -

    • DOI

      doi: 10.1007/978-3-319-93701-4_1

    • Peer Reviewed
  • [Journal Article] Viscoelastic Crustal Deformation Computation Method with Reduced Random Memory Accesses for GPU-based Computers2018

    • Author(s)
      Takuma Yamaguchi, Kohei Fujita, Tsuyoshi Ichimura, Anne Glerum, Ylona van Dinther, Takane Hori, Olaf Schenk, Muneo Hori and Maddegedara Lalith
    • Journal Title

      Computational Science - ICCS 2018. ICCS 2018. Lecture Notes in Computer Science

      Volume: 10861 Pages: -

    • DOI

      doi: 10.1007/978-3-319-93701-4_3

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A Fast Scalable Implicit Solver with Concentrated Computation for Nonlinear Time-evolution Problems on Low-order Unstructured Finite Elements2018

    • Author(s)
      11.Tsuyoshi Ichimura, Kohei Fujita, Masashi Horikoshi, Larry Meadows, Kengo Nakajima, Takuma Yamaguchi, Kentaro Koyama, Hikaru Inoue, Akira Naruse, Keisuke Katsushima, Muneo Hori, Maddegedara Lalith
    • Journal Title

      Proceedings of 32nd IEEE International Parallel and Distributed Processing Symposium

      Volume: - Pages: -

    • DOI

      DOI: 10.1109/IPDPS.2018.00071

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Using Artificial Intelligence and Transprecision Computing for Accelerating Finite-Element Urban Earthquake Simulation2019

    • Author(s)
      Tsuyoshi Ichimura, Kohei Fujita, Takuma Yamaguchi, Akira Naruse, Jack C. Wells, Thomas C. Schulthess, Tjerk P. Straatsma, Christopher J. Zimmer, Maxime Martinasso, Kengo Nakajima, Muneo Hori, Lalith Maddegedara
    • Organizer
      The 1st R-CCS International Symposium
    • Int'l Joint Research
  • [Presentation] Accelerating Low-Order Unstructured Finite Element Earthquake Simulation by Time-Parallel Computation on Recent HPC Architectures2018

    • Author(s)
      Kohei Fujita, Tsuyoshi Ichimura, Takuma Yamaguchi, Muneo Hori, Lalith Maddegedara
    • Organizer
      Platform for Advanced Scientific Computing (PASC) Conference
    • Int'l Joint Research
  • [Presentation] 地下構造物の高詳細三次元地震応答解析のための,メッシュ生成手法及び高性能有限要素法の開発2018

    • Author(s)
      藤田航平・勝島啓介・市村強・堀越将司・中島研吾・堀宗朗・マッデゲダララリス
    • Organizer
      第15回 日本地震工学シンポジウム
  • [Presentation] 大規模液状化解析のための超並列高速ソルバー開発に関する基礎研究2018

    • Author(s)
      日下部亮太・市村強・藤田航平・堀宗朗・Lalith Wijerathne
    • Organizer
      第15回 日本地震工学シンポジウム
  • [Presentation] GPUによる3次元有限要素解析の高速化と構造最適化問題への適用2018

    • Author(s)
      山口拓真・藤田航平・市村強・堀宗朗・ラリスウィジャラトネ
    • Organizer
      第15回 日本地震工学シンポジウム

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Published: 2019-12-27  

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