Non-Gaussian feature of wind-induced pressure on super-tall building

Wind tunnel tests were conducted on a diamond-shaped super-tall building with corner cuts. The non-Gaussian features of the wind-induced pressure on the building were analyzed through the wind pressure data analysis both in time domain and amplitude domain. Based on the third and the fourth order statistical moments of wind pressure coefficients, the Gaussian and non-Gaussian regions of the wind pressure at a given wind direction were identified on the surface of the super-tall building, respectively. The non-Gaussian features were prominently exhibiting at the leading edge separation on the side face, lee ward side and the windward corner cuts. The determination method of peak factor for the design wind pressure coefficient at the Gaussian and non-Gaussian regions was discussed. Results show that the current code-specified values of peak factor are riskily used at the non-Gaussian region in some wind engineering practices.