Study on Method for Estimating Maximum Response for Seismic Design of Multiple Supported Elastic-Plastic Piping Systems

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420175
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Dynamics/Control
• Research Institution: Kyoto Institute of Technology
• Principal Investigator: Sone Akira 京都工芸繊維大学, 機械工学系, 教授 (20197015)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 配管系 / 耐震設計 / 弾塑性応答 / 非線形 / バイリニア

Outline of Final Research Achievements

A method proposed for a one-input piping system having friction characteristics is applied to an elasto-plastic piping system receiving two inputs, a comparison between the obtained estimated value and an exact solution obtained by time history response analysis, and two input excitation experiments, and the following results were obtained.(1) As the correlation coefficient of two inputs increases, the response reduction coefficient increases. As the correlation coefficient increases, the accuracy of the estimation method also improves.(2) Although the estimation accuracy varies depending on the combination of the dominant frequency band of the input wave and the natural frequency of the piping, its accuracy improves when the response of the piping is large in any combination. As the initial rigidity and the stiffness ratio α after yield decrease, the response reduction coefficient increases and accordingly the accuracy of the estimation method improves.

Free Research Field

機械力学