根入れ基礎をもつ構造物の振動特性について (1)

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  • DYNAMICAL CHARACTERISTICS OF STRUCTURE WITH BURIED FOUNDATION (1)
  • ネイレ キソ オ モツ コウゾウブツ ノ シンドウ トクセイ ニ ツイテ 1

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In this paper is considered a structure embeded in a perfectly elastic layer medium over a half-space when subjected to horizontal base rock motions. In order to avoid unnecessary complication, consideration is restricted to twodimensional rigid structure. In Sec.2 is derived the set of governing equations on soil-structure interaction system subjected to base rock excitation. In Sec.3 are determined the sway and the rotational spring constants of the base rock by using the values of statical ground compliance in the case of a half-space which have been derived in the former works. In Sec.4 are derived the analytical expressions for the sway and the rotational spring constants of sub-side soil ground when the basement wall vibrates horizontally or rotationally. It is verified by using Maxwell-Betti-Lamb's reciprocal theorem that the rotational spring constant under condition of the basement wall to be horizontally excited equals to the sway one rotationally. In Sec.5 are derived the analytical solutions of the dynamical wave pressure which operates on the basement wall when subjected to horizontal base rock motions.

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