不规则结构扭转风荷载

对具有“靴型”造型的超高层建筑进行多点同步测压风洞试验，详细研究该类建筑的扭转风荷载.引入扭转向等效力偶的概念,比较扭转向等效力偶与水平风荷载之间的大小关系.结果表明：等效力偶与水平风荷载量级相当.比较分析各测点层平均和均方根扭矩系数随风向角的变化关系，发现两者都与截面的厚宽比有着密切的联系.最后，采用最小二乘法对超高层建筑扭转层风荷载规格化功率谱曲线进行了拟合，并通过拟合曲线直观反映了扭转风荷载受层高、厚宽比等参数的影响规律.

Torsional wind load with irregular shape

The torsional wind loads of the super high-rise buildings with the boot-like shape are researched by implementing the multi point synchronous pressure test on the building. The concept of torsional equivalent couples is introduced to be compared with the corresponding lateral wind loads, and the result shows that they have equivalent importance. By comparing and analyzing the relationship between each average distribution law and root mean square of torque coefficients under different wind incidence angles, it suggests that both of them have a tight relationship with structure thickness-width ratio. Finally, the normalized power spectrum density of the torque wind load for super high rise buildings is fitted with the least squares method and the correlation between the power spectrum to the story height or structure thickness-width ratio can be directly reflected.