Development of rotary inertial damper having force restriction mechanism for response control of seismically isolated structures

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360220
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Building structures/materials
• Research Institution: Tohoku University
• Principal Investigator: IKAGO Kohju 東北大学, 災害科学国際研究所, 教授 (20521983)
• Co-Investigator(Kenkyū-buntansha): IKENAGA Masahiro 東北大学, 工学研究科, 助教 (50552402)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ダイナミック・マス / 変位制御 / 免震構造

Outline of Final Research Achievements

This research work derived a closed form optimal design of a new damper system consisting of rotary inertial damper having a force restriction mechanism and a spring element connecting it to the structure. The optimal damper restriction force and spring stiffness are determined such that the peak of the acceleration amplification factor obtained by linearizing the hysteretic property of the force restriction mechanism is equal to the amplification factor at the fixed point of the resonance curve.
Furthermore, series of experiments using small scale and full scale damper are conducted to validate the effectiveness of the proposed damper.

Free Research Field

耐震工学