Full-scale measurement-based investigation on wind field characteristics of super tall buildings under strong wind gusts

Based on basic principle of the wind pressure testing, a new type of wind pressure sensor was devised here in order to obtain the wind field characteristics of super tall buildings under strong wind gusts. An implementation scheme of full-scale measurement wind field on a super tall building was proposed. The wind velocity and directions on the top of the tall building were captured and moreover, the wind pressure time histories at six locations selected on the wall were recorded. Subsequently, the wind velocity and pressure data measured synchronously were analyzed so as to gain an insight into the characters of wind velocity, directions, and wind pressure. The results showed that the wind velocity fluctuations may be not consistent with the typical velocity spectra; likewise, the probability density functions (PDF) also may not be in obedience to the Gaussian distribution under the special terrain conditions; in this case, the wind pressure on the wall, especially in separated regions, also reveales non-Gaussian characters to different degree; the spatial correlation of the wind pressure fluctuations is in agreement with that obtained from wind tunnel tests.