Passive negative stiffness device for vibration control of coupled structures
| Project/Area Number |
21J10149
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 国内 |
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| Review Section |
Basic Section 23010:Building structures and materials-related
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| Research Institution | Hokkaido University |
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Principal Investigator |
LONGJAM SONIA 北海道大学, 大学院工学院, 特別研究員(PD)
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| Project Period (FY) |
2021-04-28 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2022: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2021: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | Negative stiffness / Coupled structures / Adjacent buildings / Passive control / Vibration control / Transfer function / Optimization |
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| Outline of Research at the Start |
Investigate the response control effects by PNSD for vibration control structures. Lumped mass models will be used as the structural models. PNSD specimens with a damper will be implemented in coupled systems. Conduct a time history analysis of a coupled 2DOF system. An experiment will be conducted using a shake table. The established theoretical and analytical models will help in designing a realistic and high-capacity PNSD, which can produce a large negative restoring force. Publication of the research findings in journal(s) and international conference(s).
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| Outline of Annual Research Achievements |
Numerical investigation on linear and nonlinear time history seismic response simulation using the multi degree of freedom coupled vibration control (CVC) structures linked with negative stiffness were conducted. Coupled structures with different natural periods and structural parameters were used for time history seismic response simulation under various earthquake motions. As a result, the numerical study achieved an effective control performance upon installing the optimized negative stiffness at the connecting portion of the CVC model. The study also indicated that the reduction in the structural response of CVC systems subjected to input motions depends on the setting of the connecting elements. Validation of the theoretical and numerical investigations were done by conducting experiments using the shake table tests for CVC structures linked with passive negative stiffness device (PNSD) under dynamic excitations. Significant control performance of the CVC structures by incorporating a PNSD as the connector under seismic excitations was attained. The study experimentally and numerically elucidated the response behavior and control effects of CVC structural systems incorporating passive negative stiffness at the connection subjected to earthquakes. The research contributed to the advancement of aseismic technology of coupled or adjacent buildings utilizing the PNSD.
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| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
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Report
(2 results)
Research Products
(3 results)
