The current seismic design of a piping system for nuclear power plants are being based on the elasticity analysis on a principle. Therefore, as a reasonable seismic design approach for the future, research is progressing in a direction admitted the accepted and/or controlled plastic deformation in which a piping system doesn't lead to failure. On the other hands, when postulated seismic loads for design become stronger, we must check the safety margin. However, it is difficult to conduct many dynamic tests to investigate the behavior of an actual piping system, and we require the FEM code that can investigate dynamic behavior accurately.
展开▼
