Session: SE-06-02 The T.H. Liu Memorial Symposium on the Seismic Analysis and Design of Piping Systems-2

Paper Number: 122949

122949 - Piping Seismic Design Method by Asme Cc N900 

  Since the Great Hanshin Earthquake in 1995, seismic isolation structures have rapidly become popular for non-nuclear buildings. Also, since the Great East Japan Earthquake in 2011, there has been a growing need for the adoption of seismic isolation structures for nuclear power plants. In the case of seismic isolation structures for nuclear power plants, it has been reported that conventional seismic design methods are not feasible for the seismic design of crossing pipes that straddle the building seismic isolation boundary, which are supported by many support points, due to issues such as the compatibility between large relative displacement at anchors and response reduction of the pipes. One of the methods to solve this problem is a seismic evaluation method using elastic-plastic analysis of piping. Although ASME SEC. III published a Code Case on seismic evaluation method using elastic-plastic analysis of piping in 2019, it is not yet well used in actual seismic design work. Therefore, this paper aims to clarify the merits of the piping design method based on ASME CC N900 and provides application examples for building-crossing piping and indoor small- and medium-diameter piping. Also, this is a follow-up of paper of PVP2023-107170 "Seismic Design Method of Crossover Piping Across Building Isolation Boundary".

Presenting Author: Kenichi Shibukuwa IHI Corporation

Presenting Author Biography: Kenichi Shibukuwa is a manager at IHI Corporation in Japan. His work focuses specifically on management of maintenance and construction project for Domestic Nuclear Power Plant. He has a lot of expertise in the piping engineering of nuclear power plant for 33 years. Also, He has been active in JSME(The Japan Society of Mechanical Engineers) and JEA(The Japan Electric Association) as code engineer since 2020.

Authors:

Kenichi Shibukuwa IHI Corporation
Jie Wen Jensenhughes
Kenji Funasaki Toshiba