A study towards precise evaluation of amplitudes for aerodynamic vibrations of stay-cables considering their surface conditions
| Project/Area Number |
21560501
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
YAGI Tomomi 京都大学, 大学院・工学研究科, 准教授 (30293905)
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| Co-Investigator(Kenkyū-buntansha) |
SHIRATO Hiromichi 京都大学, 大学院・工学研究科, 教授 (70150323)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 風工学 / 斜張橋ケーブル / ドライステートギャロッピング / 臨界レイノルズ数 / 軸方向流れ / カルマン渦 / PIV解析 / 降雨 / 水路 / ケーブル表面形状 / レイノルズ数 / 耐風設計 / 制振対策 / 抗力係数 / レインバイブレーション |
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| Research Abstract |
To investigate the galloping instability of inclined stay cables, the cable models with various kinds of surface conditions were tried to use for the wind tunnel tests. Then, it becomes clear that a cable with spiral protuberances shows the significant stability due to its three dimensional flow separation, and also, the instability of dry-state galloping can be explained by surface roughness of cable, which is related to the critical Reynolds number range. These facts are confirmed by both aerodynamic forces and flow patterns around the cable.
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Report
(4 results)
Research Products
(23 results)
