由本文之研究結果可知，平均風速強度對風速剖面指數值有些許的影響紊流強度隨著風速增加而遞減，而順風向積分尺度長度則隨著風速增加而遞增,Karman經驗頻譜公式作為代表該地自然風場特性的建議參數值。經由發展完成的風洞實驗,可得知該實驗風場特性並與實場監測結果做比較,擁有不錯相似性 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.
