| 研究課題/領域番号 |
21J10149
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 補助金 |
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| 応募区分 | 国内 |
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| 審査区分 |
小区分23010:建築構造および材料関連
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| 研究機関 | 北海道大学 |
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研究代表者 |
LONGJAM SONIA 北海道大学, 大学院工学院, 特別研究員(PD)
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| 研究期間 (年度) |
2021-04-28 – 2023-03-31
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| 研究課題ステータス |
完了 (2022年度)
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| 配分額 *注記 |
1,700千円 (直接経費: 1,700千円)
2022年度: 800千円 (直接経費: 800千円)
2021年度: 900千円 (直接経費: 900千円)
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| キーワード | Negative stiffness / Coupled structures / Adjacent buildings / Passive control / Vibration control / Transfer function / Optimization |
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| 研究開始時の研究の概要 |
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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| 研究実績の概要 |
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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| 現在までの達成度 (段落) |
令和4年度が最終年度であるため、記入しない。
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| 今後の研究の推進方策 |
令和4年度が最終年度であるため、記入しない。
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