高速炉に適用する厚肉積層ゴムの1/2縮尺試験体を用いた終局特性評価

Abstract

This paper describes the results of static loading tests using a half-scale thick rubber bearing to investigate ultimate characteristics application for a Sodium-cooled-Fast-Reactor (SFR). The thick rubber bearing, which has a rubber layer roughly two times thicker in comparison with conventional rubber bearings, has been developed by the authors to ensure seismic safety margins for components installed in the reactor building, and to reduce seismic response in the vertical direction as well as horizontal direction. The purpose of this paper is to provide the variations of stiffness, shear and compression, and the breaking strain or stress as ultimate characteristics through static loading tests using 31 half-scale thick rubber bearings. Additionally, the prediction techniques for ultimate characteristics using two types of analytical models, 3D-FEM and Modified Macroscopic Mechanical model, are investigated.