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

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K14866
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: The 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
• 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

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.

Free Research Field

生命基盤構造工学

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．