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Development of the Criterion of Falling Objects such as Ceilings Using Human Head FE Model

Research Project

Project/Area Number 20K14866
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 23010:Building structures and materials-related
Research InstitutionThe University of Tokyo

Principal Investigator

Nakaso Yosuke  東京大学, 生産技術研究所, 特任講師 (70756361)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords天井 / 非構造材 / 安全性評価 / 人頭模型 / 衝撃 / 人体有限要素モデル / アルミ合金 / スプリット・ホプキンソン棒法 / ひずみ速度 / 落下物 / 人体安全 / 人頭有限要素モデル
Outline of Research at the Start

本研究では,人頭有限要素モデルを用いて天井材の衝突角度や大きさを変化させたパラメトリック解析により天井材の頭部への衝突を模擬し,実験では計測困難なひずみや応力分布まで詳細に調べることで,より現実の被害に即した天井材の危険度評価法を確立する.本計画では,まず,天井材の物性値の取得及び構成式の提案を行う.次に,取得した天井材の物性値を利用して既往の天井材落下実験の模擬解析を行う.解析手法の妥当性を確認した後,人頭有限要素モデルを用いた衝撃解析を行い,最大荷重だけでなく頭部の応答加速度や頭蓋骨に発生する応力等について考察を行う.また,天井材のスケール効果や衝突角度についても検討する.

Outline of Final Research Achievements

We proposed the quantitatively evaluation method by comparing the impact load generated during collision with the appropriate human tolerance for ceiling collapse, which occurs on a daily basis not only due to earthquakes but also due to dew condensation and rain leaks around the world. The impact load was measured using a strain gauge load cell installed under a dummy head In this study, the impact load and the stress generated in a head under various fall conditions were obtained by numerical analysis using a human head finite element model, and a risk assessment method that was more in line with actual damage was examined.

Academic Significance and Societal Importance of the Research Achievements

世界各国で地震のみならず結露や雨漏り等の要因で日常的に発生している天井落下被害に対し、衝突時に発生する衝撃荷重と適切な人体耐性指標を比較することで危険度の定量的な評価手法を開発した.衝撃荷重は,マグネシウム合金製の人頭模型に天井材を衝突させ人頭模型直下のロードセルにより計測している.本研究では,様々な落下状況下における衝撃荷重や頭部に生じる応力等を人頭有限要素モデルを用いた数値解析により求め,より現実の被害に即した危険度評価手法の検討を行った.

Report

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

    (2 results)

All 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results)

  • [Journal Article] A RESEARCH ON THE SAFETY CRITERION OF CEILINGS USING HUMAN TOLERANCE INDEX (PART 2): IDENTIFICATION OF IMPACT LOAD ON A DUMMY HEAD BY INVERSE ANALYSIS2022

    • Author(s)
      中楚 洋介,川口健一
    • Journal Title

      Journal of Structural and Construction Engineering (Transactions of AIJ)

      Volume: 87 Issue: 793 Pages: 274-284

    • DOI

      10.3130/aijs.87.274

    • NAID

      130008165319

    • ISSN
      1340-4202, 1881-8153
    • Year and Date
      2022-03-01
    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A RESEARCH ON THE SAFETY CRITERION OF CEILINGS USING HUMAN TOLERANCE INDEX (PART 1): A PROPOSAL OF THE SAFETY CRITERION OF CEILING BOARDS SET AT A HEIGHT2021

    • Author(s)
      川口健一,中楚 洋介
    • Journal Title

      Journal of Structural and Construction Engineering (Transactions of AIJ)

      Volume: 86 Issue: 786 Pages: 1281-1290

    • DOI

      10.3130/aijs.86.1281

    • NAID

      130008080429

    • ISSN
      1340-4202, 1881-8153
    • Year and Date
      2021-08-30
    • Related Report
      2021 Research-status Report
    • Peer Reviewed

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Published: 2020-04-28   Modified: 2024-01-30  

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