機器配管系の支持構造部の地震挙動評価

Seismic evaluation of support structures for components and piping systems

酒井 理哉*; 塩竈 裕三*; 西田 明美  ; 新谷 文将; 櫛田 慶幸; 近藤 誠

Sakai, Michiya*; Shiogama, Yuzo*; Nishida, Akemi; Araya, Fumimasa; Kushida, Noriyuki; Kondo, Makoto

原子力プラント内部の機器・配管系の支持構造部に着目し、有限要素解析を行い耐震安全性を評価した。配管支持構造及び機器支持構造についてモデル化した弾塑性解析は、実験結果との比較より、荷重変位関係,局所変形・ひずみの集中,ひずみの累積挙動、など精度よく評価できた。

We focused on the joints of support structures in nuclear plants which generally designed as fixed/pinned boundaries and evaluated their earthquake-resistant properties through finite element analyses. A piping support structure and a component support structure were modeled and elastic-plastic analyses were performed on them. The analytical results were compared with the experimental results, and it was confirmed that the load-displacement relations, the concentration of the local deformations or strains, and the strain accumulation behavior obtained by analytical results had proper precision.