| 研究課題/領域番号 |
20K14811
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| 研究種目 |
若手研究
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| 配分区分 | 基金 |
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| 審査区分 |
小区分22020:構造工学および地震工学関連
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| 研究機関 | 名古屋工業大学 |
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研究代表者 |
項 乃亮 名古屋工業大学, 工学(系)研究科(研究院), 助教 (10839765)
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| 研究期間 (年度) |
2020-04-01 – 2023-03-31
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| 研究課題ステータス |
交付 (2020年度)
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| 配分額 *注記 |
3,900千円 (直接経費: 3,000千円、間接経費: 900千円)
2022年度: 1,170千円 (直接経費: 900千円、間接経費: 270千円)
2021年度: 1,300千円 (直接経費: 1,000千円、間接経費: 300千円)
2020年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
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| キーワード | Conventional dissipation / Residual deformation / Self-centering / Seismic resilience / Bridge structures / Bridge Infrastructure / Shape Memory Alloys / Conventional Damping / Seismic Devices / Seismic Resilience |
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| 研究開始時の研究の概要 |
This study aims to develop novel SMA devices for enhancing bridge seismic resilience. Conventional damping mechanisms are combined to balance energy dissipation and self-centering of SMAs. New performance indicators, device-level design optimization, and system-level design methods are established.
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| 研究実績の概要 |
As the first stage of this research project, the seismic performance of conventional energy dissipation components in bridges was evaluated, including yielding steel dampers, friction dampers, and viscous dampers and sliding elastomeric bearings. The deficiencies of such dissipative components in terms of residual displacement/deformation were identified. The results indicate that conventional dissipative members are effective in dissipating seismic energy by displaying wide hysteresis, but result in excessive residual displacements that are unfavorable to post-earthquake performance of bridges. Therefore, the incorporation of SMAs as critical self-centering members to conventional dissipative members is essential to improve the seismic resilience of bridges.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
In the first year of the this research, in addtion to evaluating the seismic performance of the conventional energy dissipation mechanisms, the possbile combination types between conventional dissipators and SMAs should have been tried and assessed. More academic papers should have been published.
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| 今後の研究の推進方策 |
In the next research year, more related works will be done. First, try to combine SMAs and conventional dissipation mechanisms in various ways and find the optimzed one from them. Second, propose novel bridge systems with balanced energy dissipation and self-centering capacities. Third, perform quasi-static tests to evaluate the behavior of the combined components. These research outcomes will be presented in several journal papers and conference proceedings.
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