振動数依存性を有する粘弾性体の動的抵抗の時刻歴解析用モデル化手法 : バネーダッシュポットモデル,分数次導関数モデル,及び減退記憶モデルの比較

抄録

It is necessary to consider the frequency dependent behavior of viscoelastic material in order to simulate seismic behavior of structures with viscoelastic dampers. Three dynamic mechanical models for viscoelastic material, the spring-dashpot model, the fractional derivative model and the fading memory model are examined in frequency and time domains. A generalized fractional derivative model is proposed to consider frequency dependent for wide frequency region. The spring-dashpot model and the fractional derivative model are expressed by the fading memory model with an adequate memory function. Load-deformation relations of calculated results using three models were in agreement with experimental value respectively. Three models explain well frequency dependent characteristic of viscoelastic material.