Abstract
This paper proposes an elastic-plastic-based decoupling criterion that can be applied to the seismic analysis of large-scale complex piping systems in nuclear power plants under beyond design basis earthquakes. First, the existing elastic-based decoupling criteria for seismic analyses were critically reviewed. Next, the effect of plasticity on the decoupling criteria was investigated by considering the equivalent damping and stiffness reduction. Finally, the decoupling criterion considering plasticity was developed based on the changes resulting from existing decoupling criteria. The validity of the proposed decoupling criterion was confirmed through its application to an analysis of a real piping system.
| Original language | English |
|---|---|
| Pages (from-to) | 4563-4573 |
| Number of pages | 11 |
| Journal | Journal of Mechanical Science and Technology |
| Volume | 34 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2020 Nov |
Bibliographical note
Funding Information:This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20171520 101650 and No. 20181510102380).
Publisher Copyright:
© 2020, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature.
Keywords
- Decoupling criterion
- Elastic-plastic seismic analysis
- Nuclear power plants
- Piping systems
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering