| Project/Area Number |
15H04071
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/Materials
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
奥田 泰雄 国立研究開発法人建築研究所, その他部局等, 研究員 (70201994)
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| Co-Investigator(Renkei-kenkyūsha) |
MOCHIDA Akashi 東北大学, 大学院工学研究科, 教授 (00183658)
IWASAKI Toshiki 東北大学, 大学院理学研究科, 教授 (80302074)
GAVANSKI Eri 大阪市立大学, 大学院工学研究科, 准教授 (00608797)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2016: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2015: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
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| Keywords | ダウンバースト / シミュレーター / 風荷重 / 非定常 / 実験 / 数値流体計算 / 非定常性 / ピーク風圧分布 / 最大瞬間風速分布 / 建築構造・材料 / 大気現象 / シミュレータ / 風洞実験 / 耐風設計 |
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| Outline of Final Research Achievements |
Downburst wind field and downburst-induced wind loads on a flat-roofed low-rise building have been investigated experimentally by using a downburst simulator that we developed. The downburst simulator consists of a blower of 0.6 m diameter that can move horizontally at a constant speed up to 2 m/s and a shutter-type opening installed above the outlet of the blower. The simulator can generate a pulsed jet and a moving draft either separately or simultaneously. Using this simulator, the flow structure in the downburst were first measured under various conditions. Then, non-stationary wind pressures and wind forces acting on the building were measured. The results indicate that they are significantly different from those of turbulent boundary layers.
A CFD model that can reproduce the wind field of downburst has been developed. Using this CFD model, we can investigate the downburst-induced flow fields and pressures on buildings in detail.
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