Research on Wind Speed Profile Characteristics of Typhoon Boundary Layer Based on Measured Data

: The wind-resistant design of building structures in the typhoon affected area in the codes is carried out by analogy with the non-cyclonic wind field, however, many measured results show that there is a large difference between the typhoon wind profile and the profile of the non-cyclonic wind field, and the influencing factors and changing rules of the typhoon wind profile are still not clear at present. To clearly understand the profile characteristics of typhoons, many measured profile data of several typhoons were used for the analysis. The measured data were categorized by three factors, namely, the underlying surface categories, the typhoon structural partitions,and the wind speed, and the wind profile data of each category were comparatively analyzed, and the study showed that: the low-level jet phenomena in typhoon wind profiles was related to the underlying surface categories, the typhoon structural partitions, and the wind speed, the low-level jets were more likely to occur at exposure category A, B, larger wind speed, and in the back eyewall region in typhoon; there was a certain relationship between the gradient wind height of the typhoon wind profile and the type of underlying surface and average wind speed. The gradient wind height of exposure category A and B showed an increasing trend from the center of the typhoon outward, while the gradient wind height underground of exposure category C showed a decreasing and then increasing trend from the center of the typhoon outward.