| Project/Area Number |
14350298
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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 | Tokyo Institute of Technology |
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Principal Investigator |
TAMURA Tetsuro Tokyo Institute of Technology, Interdisciplinary Graduate School of Science & Engineering, Professor, 大学院・総合理工学研究科, 教授 (90251660)
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| Co-Investigator(Kenkyū-buntansha) |
TAKEMI Tetsuya Tokyo Institute of Technology, Interdisciplinary Graduate School of Science & Engineering, Lecturer, 大学院・総合理工学研究科, 講師 (10314361)
曹 曙陽 東京工業大学, 大学院・総合理工学研究科, 助手 (00334532)
坪倉 誠 東京工業大学, 大学院・総合理工学研究科, 講師 (40313366)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥13,200,000 (Direct Cost: ¥13,200,000)
Fiscal Year 2004: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2003: ¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 2002: ¥4,400,000 (Direct Cost: ¥4,400,000)
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| Keywords | wind turbulence / urban area / ground surface roughness / simulation / LES / SGS turbulence modeling / wind gust / wind-resistant design / 地方形態 |
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| Research Abstract |
In order to realize the wind hazard mitigation for buildings and structures in urban area, it is important to evaluate correctly the wind characteristics in the altitude region at 100 to 200 m. However the ground surface is covered by various objects such as buildings with complicated shape and many sorts of vegetations, and the space close to the ground is not uniform. Especially, in urban area middle- and high- rise buildings are densely built, so that spatial aspect varies very much in the altitude range of tens meters to a hundred meters. In this research, based on the recent rapid development of CFD (Computational Fluid Dynamics) technique, we utilize the computational code developed by the staff of this project for constructing the numerical model which is directly represented by the actual shape of each building on the ground surface in urban area and can predict the turbulence structures of strong wind with high accuracy. The large eddy simulation (LES) is carried out, in order to clarify the structures of strong wind gust and its fluctuation characteristics influenced by the roughness conditions of ground surface and its shape or undulation. Also, utilizing the results and the information obtained, the structural safety of buildings and structures against strong wind is realized and the sophistication of the wind-resistant design is performed.
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