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

Abstract

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.