建物と家具の統合モデルを用いたEPS緩衝材による棟間衝突被害低減効果の評価

Evaluation on Seismic Pounding Damage Reduction Effect of EPS Cushioning Material Using Integrated Model of Building and Furniture

Abstract

本研究では，EPS材の材料特性を考慮した上で，EPS緩衝材を側面に設置した2棟の高さの異なる隣接した中高層ビルと家具をはり要素でモデル化し，それらを統合的に解析することができる有限要素解析プログラムを開発することで，棟間衝突解析を行った．そして，各建物の応答加速度，塑性化率（全柱・梁の要素数に対する塑性化した要素の割合），家具の転倒挙動についてEPS緩衝材の有無，EPS緩衝材の厚さと発泡倍率を変更した場合で比較し，その衝撃緩和効果を評価した．有限要素解析手法には，衝突解析において実績があり，最小限の要素分割で骨組構造物の挙動を解くことができる，ASI-Gauss法を用いた．

In this research, the effect of two types of EPS cushioning materials with different foam ratio and thicknesses in reducing seismic pounding damage was verified by conducting seismic pounding analysis using an integrated model of building and furniture. As a result, it was clarified that overturning behavior of furniture was different when different EPS cushioning materials were installed. It was also shown that the acceleration response was more suppressed when the EPS cushioning material was deformed to the plateau region, compared to the case when the deformation remained in the elastic region. On the other hand, the yielded ratio was suppressed in the low-rise model, but was increased in the high-rise model.