Numerical examination on seismic response behavior of a piping system considering the plastic deformation of supports

• Published in: The International journal of pressure vessels and piping Vol. 211; p. 105265
• Main Authors: Nakamura, Izumi, Kasahara, Naoto
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-10-2024
• Subjects: Excessive seismic load; Inelastic response; Passive safety structure; Pipe support; Piping system; Inelastic response; Piping system; Excessive seismic load; Pipe support; Passive safety structure
• ISSN: 0308-0161
• DOI: 10.1016/j.ijpvp.2024.105265

A previous study proposed a passive safety structure to mitigate severe damage to crucial components under the beyond design basis event (BDBE). To examine the applicability of this concept to the piping system, the effect of the elastic-plastic behavior of the piping support structure on the seismic response of the piping system was investigated through elastic-plastic time history response analyses on a piping system model with multiple support structures. The numerical analyses considered the elastic-plastic behavior of supports and/or the inelastic characteristics of pipe material. The analysis results confirmed that the response of the piping system can be suppressed by adequately introducing the inelastic behavior of support structures. The results show the possibility of realizing of passive safety structure in piping systems and addressing some issues, such as changing vibration modes due to the elastic-plastic deformation of the support or the order of generation of inelastic behavior of pipe material and supports.
•A numerical investigation of the seismic response of piping systems was conducted.•The elastic-plastic behavior of the pipe material and/or support was considered.•The elastic-plastic behavior of the support reduces plastic strain on pipes.•The result implies that the support failure could mitigate the pipe failure.