The behavior of wind around stepped tall building is quite different comparing with the symmetric plan shape tall building. Setback roof of stepped buildings is widely responsible for the turbulence around the building. The purpose of this work is to understand the behavior of wind load on stepped tall building model. Four different models having the same dimensions and same aspect ratios but different setback distances, namely Models A, B, C and D, are considered. The setback distances are 0.2L, 0.3L, 0.4L and 0.5L (L = length) and are located at H/2 level (H = height) from the base of domain. Computational fluid dynamics simulations are taken out of terrain category 2 with the model scale 1:300. The foreground of this study is the external pressure and force variation around the building face and roof at 0° and 90° wind incidence angles. Maximum positive pressure coefficient develops at 90% of building height from the base of all models and for setback case it goes to 80%. Negative pressure develops at the building roof top, whereas positive pressure develops in the setback roof for the same model and wind angle. This type of pressure variable will be considered in roof design of stepped building.

与对称平面形状的高层建筑相比，阶梯状高层建筑周围的风的行为有很大不同。阶梯式建筑物的后退屋顶是造成建筑物周围湍流的主要原因。这项工作的目的是了解阶梯式高层建筑模型上的风荷载行为。考虑具有相同尺寸和相同纵横比但缩进距离不同的四个不同模型，即模型A，B，C和D。挫折距离为0.2 L，0.3 L，0.4 L和0.5 L（L  =长度），位于H / 2级（H =高度）。计算流体动力学模拟是从1：2比例模型的地形类别2中提取的。这项研究的前景是在风入射角为0°和90°时，建筑物表面和屋顶周围的外部压力和力的变化。从所有型号的底座开始，最大正压系数在建筑物高度的90％处发展，在挫折情况下，最高正压系数达到80％。在相同型号和风向的情况下，建筑物屋顶上会产生负压，而在挫折屋顶上会产生正压。在阶梯式建筑物的屋顶设计中将考虑这种压力变量。