RELATION BETWEEN DAMPING MODEL AND ACCURACY IN IDENTIFICATION OF SUBSURFACE GROUND

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  • TSUJIHARA Osamu
    社団法人 土木学会 和歌山工業高等専門学校 環境都市工学科
  • SAWADA Tsutomu
    社団法人 土木学会 徳島大学 工学部建設工学科

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  • 地盤同定問題における減衰モデルと推定精度の関係
  • ジバン ドウテイ モンダイ ニ オケル ゲンスイ モデル ト スイテイ セイド ノ カンケイ

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The purpose of this study is to investigate the relation between the damping model used in the horizontally laminated ground model and the accuracy in identification of the parameters using vertical array records of ground motions. The stiffness and damping parameters are generally identified in this type of problem, supposing onedimentional multiple reflection of shear wave. As to the stiffness, the shear wave velocity of each layer is identified. On the other hand, as to the damping, several models have been proposed, moreover some researchers identified uniform parameters through the layers and others identified the parameters of each layer. In this paper, it is demonstrated how the difference of damping model and conditions of analysis influence on the accuracy of identification of damping parameters.

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