Seismic Response Analysis of BFG Holder Considering Nonlinear Soil Foundation Interaction

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  • 地盤との非線形動的相互作用を考慮した高炉ガスホルダーの地震応答解析
  • ジバン トノ ヒセンケイ ドウテキ ソウゴ サヨウ オ コウリョシタ コウロ ガス ホルダー ノ ジシン オウトウ カイセキ

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Abstract

Because the currently existing important industrial and civil structures were designed and constructed on the basis of the past earthquake resistant design regulations, it is important to examine the seismic response behaviors of these existing important structures by using the current knowledge on earthquake loadings and the advanced method of 3-dimensional nonlinear seismic response analysis. In this paper, the 3-dimensional nonlinear seismic response behaviors of a BFG holder have been examined using a 3-dimensional fiber element method that can make it possible to model digitally the substructures and superstructures based on the nonlinear stress-strain behaviors of the materials of the structures. The computer code of 3-D fiber element method used in this analysis can take into account for the 3-dimensional nonlinear dynamic soil foundation interaction, and also the material and geometrical nonlinear behaviors of the beam and shell elements of the BFG holder. It is found from numerical analysis that the seismic behaviors of BFG holder strongly change depending on the height (position) of the piston of the BFG holder and also the piston moves laterally and rotationally during earthquake loadings.

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