Experimental Study on Dynamic Wind Loads on Super-tall Buildings

Wind-induced vibration is the controlling factor for structural design of super-tall buildings. But the present state of research on across-wind dynamic load is far from being satisfactory for practical use and drawing up of codes or standard 13 super-tall building models with typical cross-sections have been tested under several simulated wind conditions in a wind tunnel using a high -frequency-force- balance to investigate the dynamic wind loads, especially the across-wind loads. The results indicate that the building configuration and wind condition have major effects on the wind loads, while the effects of the aspect ratio on the wind loads may be negligible. The fitting formulas of the first generalized across-wind loads on these buildings are finally given, which can be used for reference in revising codes.