医療施設内の什器を対象とした地震時挙動解析

Motion Analysis on Seismic Behavior of Furniture in Medical Facilities

Abstract


大地震が起きた際,医療施設は什器の破損や故障,薬品棚の転倒などにより本来の機能を保持できなくなる恐れがある.その事態に対応すべく,防災科学技術研究所では医療施設の機能保持や耐震性向上を目的とした実規模振動実験が行われた.本研究では,数値解析手法としてペナルティ接触理論に基づくアルゴリズムを導入したASI-Gauss法を用い,実験データを基に医療施設内の什器の挙動を解析的に明らかにすることを試みた.


In big earthquakes, it is assumed that medical facilities will not be able to preserve its original function due to damage and trouble of furniture. To achieve the preservation of function, the behaviors of furniture with casters need to be considered because there is much furniture in medical facilities. To improve the seismic performance of medical facilities, shaking tests for a specimen assuming a hospital including real furniture and equipment were conducted at NIED. In this study, the motion behaviors of furniture with casters in medical facilities under seismic excitations based on the data of shaking tests were analyzed. To realize various contact phenomena during seismic excitations, the ASI-Gauss code including frictional contact algorithm based on the penalty method was adopted. As a result, it was confirmed that a fixed condition of casters had a great effect on the motion behaviors of furniture in medical facilities.


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