Session: SE-09-02 Advanced Seismic Evaluation and Code - 2
Paper Number: 108029
108029 - Development of Seismic Response Analysis Method of Piping System -A Formulation of Nonlinear Spring Model for Piping Support Structures -
In probabilistic risk assessment against earthquakes (seismic PRA) for nuclear power plants, the development of a realistic response analysis method for the fragility assessment of piping systems considering input seismic motions exceeding design assumptions is one of the important issues. Usually, piping systems exhibit complex three-dimensional shapes. The arrangement and stiffness of the piping support structures significantly affect the response characteristics of the entire piping system. Therefore, it is necessary to develop a realistic response analysis method of piping systems including piping support structures. In this study, a method for modeling the elasto-plastic hysteresis characteristics of piping support structures is developed to establish a seismic response analysis method of piping systems including piping support structures. First,
we formulate an elasto-plastic spring model that can express the elasto-plastic hysteresis characteristics of a piping support structure. Subsequently, we perform a simulation analysis for the loading test of a piping support structure using this model. As the analysis results and test results were in good agreement, we confirmed the effectiveness of the formulation of the model. The main contents, such as the formulation of the elasto-plastic spring model, the simulation analysis of the loading test, and the comparison between the analysis results and the test results, and the results of this study are reported in this paper.
Presenting Author: Kiyotaka Takito Japan Atomic Energy Agency
Presenting Author Biography: Mar 2021 Completed Master's programme at Tokyo Denki University
Apr 2021 Joined Japan Atomic Energy Agency
Authors:
Kiyotaka Takito Japan Atomic Energy AgencyYukihiko Okuda Japan Atomic Energy Agency
Akemi Nishida Japan Atomic Energy Agency
Yinsheng Li Japan Atomic Energy Agency
Development of Seismic Response Analysis Method of Piping System -A Formulation of Nonlinear Spring Model for Piping Support Structures -
Paper Type
Technical Paper Publication