弾塑性応答解析を用いた耐震設計法の実規模配管系への適用

抄録

It is widely recognized that the current seismic design methods for piping involve a large amount of safety margin. While plastic deformation occurs in the piping under excessive seismic loadings, the energy dissipation by plastic deformation causes large damping effect.

A code case by JSME Nuclear Codes and Standards is being developed to provide seismic design evaluation of piping using elasto-plastic response analysis. The benchmark analyses have been performed in the task for the code case to investigate the variation of the elasto-plastic analysis results.

Although a couple of benchmark analyses have been performed for piping elements and a simple piping, the code case has not been applied to the model such as full scale piping yet. In this study, based on the code case, elasto-plastic response analysis and fatigue evaluation for the piping such as full scale piping were performed, and applicability and the rationalized effect of the seismic design method were investigated.