Approximation of elasto-plastic response of the equipment and piping system based on linear seismic response spectra

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14184
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Dynamics/Control
• Research Institution: Tottori University
• Principal Investigator: TANIGUCHI Tomoyo 鳥取大学, 工学(系)研究科(研究院), 教授 (90346370)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 弾塑性応答 / 降伏時モード諸量 / 二乗和平方根法 / 絶対最大値 / 近似解析法 / 等価線形化法 / 多自由度系

Outline of Final Research Achievements

The response of a Multi Degree Of Freedom (MDOF) system while its member exhibits plasticity consists of the modal properties that can be determined by considering the post-yielding stiffness of the being yielded member of the MDOF system. Such characteristics enable to develop a calculation that approximates the absolute maximum elasto-plastic response of the MDOF based on the linear seismic response spectra. Employing a 5 Degree Of Freedom system whose first, third and five storey yields respectively, the analytical accuracy of the proposed method is elaborately examined. The analytical results show that the proposed method can analyze the absolute maximum elasto-plastic response of the MDOF system as the conventional Square Root of Sum of Square (SRSS) method analyses the absolute maximum linear response of the MDOF system. It implies that the proposed method can easily expand to the approximation of the elsato-plastic response of the equipment and piping system.

Free Research Field

耐震工学