Development on rubber bearings for sodium-cooled fast reactor, 3; Ultimate properties of a half scale thick rubber bearings based on breaking test

高速炉免震用積層ゴムの開発,3; 1/2スケール厚肉積層ゴム終局特性

深沢 剛司*; 岡村 茂樹*; 山本 智彦  ; 川崎 信史 ; 廣谷 勉*; 森泉 瑛里子*; 櫻井 祐*; 正木 信男*

Fukasawa, Tsuyoshi*; Okamura, Shigeki*; Yamamoto, Tomohiko; Kawasaki, Nobuchika; Hirotani, Tsutomu*; Moriizumi, Eriko*; Sakurai, Yu*; Masaki, Nobuo*

ナトリウム冷却型高速炉で用いられる免震用厚肉積層ゴムの終局特性を1/2スケールモデルを用い取得した。厚肉積層ゴムの基礎復元特性は、既に取得されており、本検討では、ばらつき分布を含む復元特性及び終局特性に着目した試験を実施した。その結果、剛性と減衰率及び破断ひずみに関するデータが取得できた。

Half-scale thick rubber bearing to investigate ultimate properties application for a Sodium-cooled-Fast-Reactor. The fundamental restoring-force characteristics of the thick rubber bearings has been already cleared through the static loading tests using a half-scale thick rubber bearing, 800 mm in diameter. However, variations of the restoring force characteristics and ultimate properties have not been obtained yet. The purpose of this paper is to indicate the variation of the stiffness and damping ratio concerning restoring force characteristics and the breaking strain or stress as ultimate properties through static loading tests using the half-scale thick rubber bearings.