来流湍流特性对双塔建筑风效应的影响

INFLUENCE OF INFLOW TURBULENCE CHARACTERISTICS ON WIND EFFECTS OF TWIN-TOWER BUILDINGS

为了研究风场中来流的湍流特性对双塔建筑的气动力以及风致响应的重要影响,文中通过风洞同步测压试验,分别得到方形双塔在层流风场与湍流风场下的气动力,然后采用频域计算方法得出两个塔楼在不同风场下的风致响应。结果表明,来流中的湍流作用将极大地改变双塔的风荷载,在层流中两塔受到更大的平均风荷载,而湍流中将受到更大的脉动风荷载,同时在湍流风场下双塔结构的整体位移响应也会明显增加。

To study the important influence of the turbulence characteristics of the wind fields on aerodynamic loads and wind-induced responses of twin-tower buildings, this paper obtained the aerodynamic loads of the square twin towers under the laminar wind field and the turbulent wind field through the wind tunnel synchronous pressure test. By using the frequency domain calculation method then, the wind-induced response of the two towers under different wind fields is obtained. The results show that the turbulence of the incoming flow will greatly change the wind load of the two towers. In the laminar flow, the two towers receive a larger average wind load, while the turbulent flow will receive a larger fluctuating wind load, and the overall displacement response of twin-tower structures will also increase significantly in the turbulent wind field.