超高层建筑风荷载谱试验研究及数学模型

Experimental Study and Mathematical Model on Wind Load Spectrum of Rectangular Super Tall Buildings

在风洞建筑模型高度范围内模拟4种大小不同的湍流度,通过9个不同高宽比、厚宽比的矩形截面超高层建筑模型,考察来流湍流度、建筑高宽比、厚宽比、层高度等因素对顺风向、横风向和扭转3方向的风荷载功率谱影响规律.针对3个方向风荷载功率谱的特点分别采用不同的荷载谱模型进行参数拟合,再以湍流度、建筑高宽比等为基本变量对荷载谱模型的参数进行二次拟合,建立了复杂山地超高层建筑风荷载功率谱的数学模型.

4 different turbulent intensity were simulated in wind tunnel. 9 rectangular super tall building models, including different aspect ratio and thickness-width ratio, were tested. Effects of turbulent intensity, aspect ratio, thickness-width ratio and height of layers on along-wind, across- wind and torsional spectrum of wind loads were examined. Different fitting models of load spectrum were used in 3 different direction of wind load spectrum. Secondary fittings were done with independent variables of turbulent intensity and aspect ratio. Mathematical models of super tall buildings in complex hilly terrain wind field were established.