軸力の影響によるせん断履歴特性変化を考慮した鉛プラグ入り積層ゴムの解析手法

概要

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Isolation of taller buildings is becoming more common. Overturning in slender structures will generate large axial forces in the isolation devices. The shear properties of elastomeric bearings vary with the imposed axial stress. At large shear deformations, elastmeric bearings exhibit deterioration of horizontal stiffness and buckling under high compressive stress. The yield strength of lead-rubber bearings also vary with axial loads. The yield strength under tension stress is smaller than that under compressive stress. The authors propose an analytical model for predicting the behavior of isolators under compressive stress conditions. This existing model includes the interaction between horizontal and vertical forces and non-linear hysteresis. In this paper, an analytical model that includes tension-loads effect is developed by extending the existing model. To verify the validity of the model, analyses are performed for static loading tests of lead-rubber bearings. The results of the analyses show good agreement with the experimental results.
一般社団法人日本建築学会の論文
2011-03-25