高速増殖炉容器の耐震座屈設計法に関する研究 : 第7報, 上下動による水平方向の地震応答増幅の評価

概要

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The bucking strength of the cylindrical part of a reactor vessel is a critical factor in the seismic design of a fast breeder reactor. The buckling design research program has been carried out to establish seismic design guidelines for a fast breeder reactor. The effects of axial load on horizontal seismic responses in pre-and post-buckling states of thin cylindrical shells under horizontal and vertical seismic loads are investigated. Pseudo-dynamic buckling experiments are performed to study the dynamic buckling characteristics of thin cylindrical structures when subjected to seismic loads. The axial seismic loads reduce the lateral load-carrying capacity of the shells in the pre-and post buckling regions so that they amplify the horizontal response displacement. An amplification factor that accounts for the effects of the vertical loads is presented and its validity is verified experimentally.
1997-02-25