Uncertainty assessment of structural modeling in the seismic response analysis of nuclear facilities

原子力施設の地震応答解析における構造モデルの不確定性評価

崔 炳賢  ; 西田 明美  ; 村松 健*; 高田 毅士*  

Choi, B.; Nishida, Akemi; Muramatsu, Ken*; Takada, Tsuyoshi*

本稿では、原子力施設のモデル化手法が地震応答解析結果に与える影響を明らかにするため、多様な入力地震波を用いた地震応答解析を実施し、応答のばらつきの統計的分析を行った。特に、従来のSRモデルと3次元有限要素モデルにおける建屋の最大加速度応答の違いに着目し、入力地震動強さと建屋床高さと応答結果の関係について得られた知見について報告する。

In order to clarify the influence of the modeling method on the result of seismic response analysis of nuclear facility, seismic response analysis using various simulated input ground motions was carried out and the uncertainty of response results were statistically analyzed. In particular, we focused on the difference of the response due to the structural modeling method (a conventional sway-rocking model and 3D FE model), and the relations among the input level, floor position, and response results were described and discussed.