地震時における医療機器のロッキング・転倒に関する危険性評価

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  • 人見 真由
    株式会社竹中工務店レジリエンスソリューション推進室
  • 倉田 真宏
    京都大学防災研究所地震防災研究部門/京都大学防災研究所地域医療BCP連携研究分野
  • 相田 伸二
    京都大学医学部附属病院医療器材部
  • 下戸 学
    大津赤十字病院救急科・高度救命救急センター
  • 趙 晃済
    京都大学医学部附属病院初期診療・救急科/京都大学防災研究所地域医療BCP連携研究分野
  • 大鶴 繁
    京都大学医学部附属病院初期診療・救急科/京都大学防災研究所地域医療BCP連携研究分野

書誌事項

タイトル別名
  • Medical Equipment Seismic Performance Evaluation for Preventing Rocking and Overturning
  • ジシンジ ニ オケル イリョウ キキ ノ ロッキング ・ テントウ ニ カンスル キケンセイ ヒョウカ

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抄録

<p>This research examined the seismic behavior of medical equipment, which supports advanced hospital functions through shaking table testing and numerical analysis, and derived evaluation index for mitigating damage. The shaking table test observed the rocking and overturning of neonatal beds and a dialysis liquid feeding apparatus under sine waves and the building floor responses during earthquakes. The rocking and overturning damage occurred only when the casters of equipment were all locked, and the ratio between the equipment’s gravity center height (h) and leg width (b), b/h, is smaller than a certain threshold. The influence of equipment dimensions and weight on the seismic behavior was studied by parametric analysis using a distinct element method (DEM) model of equipment. The probability of damage decreased significantly when the ratio between the b/h becomes large. For the floor velocity response of 80cm/s, which is assumed for the approximate return period of 500 years and with the response amplification factor (the ground to floor response ratio) of 1.6, the probability of overturning became negligible when the b/h is 0.4 or larger. This paper also presents an analytical equation to calculate sufficient safety weights added to existing equipment for conforming to the above thresholds of b/h.</p>

収録刊行物

  • 生体医工学

    生体医工学 60 (6), 139-148, 2022-12-10

    公益社団法人 日本生体医工学会

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