RC造建物内に配置した耐震家具の地震時挙動解析

Motion Analysis of Quake-Proof Furniture Placed in RC Building under Seismic Excitation

Abstract


本稿では,防災科学技術研究所 (以下,NIED) で行われた実験に使用された10層RC造建物をモデル化し,その室内に家具モデルを配置して解析を行った.はじめに,実験から得られた床応答と解析結果を比較し,建物モデルの有効性について検討する.続いて,複数の耐震対策を施した家具に対して地震時挙動解析を行う.ねじの引き抜き判定には軸力を用い,引き抜きや転倒の有無について検討を行う.最後に10層RC造建物の各階に家具を配置した解析を実施し,その結果について考察を行う.


In big earthquakes, tumbled furniture such as bookshelves and desks in rooms may become fatal obstacles that obstruct people from evacuating. Recently, quake-proof furniture are getting popular to prevent accidents in earthquakes. It is important to understand the overturning behaviors of furniture with and without quake-proof countermeasures under seismic excitations, as well as the behaviors and damages of the building itself. In this paper, the motion behaviors of furniture were analyzed using the Adaptively Shifted Integration (ASI) -Gauss code utilizing frictional contact algorithm based on the sophisticated penalty method. The numerical results were validated by comparing with the experimental results. The numerical code was also applied to a motion analysis of a furniture placed at each floor of an RC building.