Field measurement and the validation of wind tunnel test of the coastal terrain
碩士 === 淡江大學 === 土木工程學系碩士班 === 95 === This paper aims to investigate the terrain classification and the wind characteristics of the strong wind defined in the building wind code. Since the nature of complex terrain and city type in Taiwan is quite different from those in US, the terrain classificatio...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2007
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| Online Access: | http://ndltd.ncl.edu.tw/handle/34361425495531681548 |
| Summary: | 碩士 === 淡江大學 === 土木工程學系碩士班 === 95 === This paper aims to investigate the terrain classification and the wind characteristics of the strong wind defined in the building wind code. Since the nature of complex terrain and city type in Taiwan is quite different from those in US, the terrain classification in the current building wind codeamy be different from ASCE7-02. Therefore, it is most urgent that these distinct local characteristics are accurately reflected in the building wind code. The analysis framework for the field measurement program is also constructed. Results from the field measurement indicate that the mean velocity gradient obtained from the field is higher than expected and the absolute mean wind speed cast only insignificant effect on the turbulence. Based on the in-situ data, a set of turbulence parameters and an empirical Harris-Karman type spectrum are recommended.
The results show that the level of mean wind speed casts minor influence on its profile; higher the wind speed, lower the power law exponential coefficient. The level of mean wind speed bears no noticeable effect on the characteristics of turbulence such as degree of turbulence intensity and integral length scale. The recommended turbulence parameters for strong wind during typhoon are listed in the paper. Wind tunnel simulated turbulent boundary layer can produce accurate mean wind speed and turbulence intensity profiles.
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