MECHANICAL CHARACTERISTICS OF LAMINATED RUBBER BEARINGS CONSIDERING COLUMN STIFFNESS IN COLUMN TOP ISOLATION

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  • TAKAOKA Eiji
    Building Construction Management Division, Kajima Corporation

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  • 柱頭免震における柱の剛性を考慮した積層ゴムの力学特性
  • チュウトウメンシン ニ オケル ハシラ ノ ゴウセイ オ コウリョ シタ セキソウ ゴム ノ リキガク トクセイ

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In this paper, the theoretical and approximate formulas are shown that can quantitatively evaluate the lateral stiffness and end rotation angle of laminated rubber bearings applied for column top isolation. An analytical model where a rubber bearing and a column are placed in series is used, and the rubber bearing is represented by a linear model based on Haringx’s theory. Numerical calculations are conducted using the proposed formulas in which the rubber bearing diameter and the column size considering practical column top isolation are adopted as parameters. It is confirmed that the proposed formulas can estimate the validity of the column size in column top isolation.

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