study of structural systems having high seismic capacities with vibration modes' change

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360229
• 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: Chiba Institute of Technology
• Principal Investigator: TAMURA Kazuo 千葉工業大学, 工学部, 教授 (50416822)
• Co-Investigator(Kenkyū-buntansha): FUKUKITA Akira 清水建設株式会社, 技術研究所, グループ長 (20426589) ; ISODA Kazuhiko 清水建設株式会社, 技術研究所, 上席研究員 (90416800)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 建築構造物 / 振動制御 / 免震 / 制振 / 地震応答 / 適応制御 / 入力地震動

Outline of Final Research Achievements

Two types of new response control mechanisms are proposed. One is a system of a base isolated structure which shows rocking movement against extremely large earthquake ground motions. The other is a system composed of frames equipped with passive dampers and hardening elements with gaps. In the former system, the seismic force of the structure is suppressed by rocking motion for unexpectedly large earthquake ground motions. In the latter system, the structure shows full capacity, by changing their vibration modes corresponding to their vibration amplitudes. The effectiveness of these systems are verified by conducting response analyses of multi-degree-of-freedom models and vibration tests of small sized models and a loading test of scaled frames equipped with the proposed system.

Free Research Field

建築構造工学、耐震設計、免震・制振