采用计算流体动力学中的非稳态分析,对某带钢塔高层建筑工程所处的区域风场进行计算,获得了作用于其表面的时程风荷载,再将荷载施加到该结构的有限元模型上进行动力响应分析。再对不同钢塔基频与场地风向角等因素下的风致动力性能与位移响应能量密度谱进行分析。研究结果表明,当钢塔基频与主体结构基频相近时,钢塔尖部的位移值达到最大,鞭梢效应最为强烈;不同风向角时塔尖位移迥异,由位移响应极值确定的最不利风向角为135°工况。塔尖位移响应频谱特性对建筑群的互扰效应与风向角的变化较为敏感,并会对结构的振动响应产生影响。当旋涡脱落频率与结构频率接近时会引起钢塔较大的耦合振动,设计时应注意避开不利环境,减小风致动力响应。 Using the unsteady analysis in computational fluid dynamics, the wind field in the area where a strip tower is located is calculated and the time-dependent wind load acting on the surface is obtained, and the load is applied to the limited structure Meta-model for dynamic response analysis. The wind-induced dynamic performance and displacement response energy density spectrum under different steel tower fundamental frequencies and site wind direction angles were analyzed. The results show that when the fundamental frequency of the steel tower is close to the fundamental frequency of the main structure, the displacement value of the steel tower reaches the maximum, and the whiplash effect is the most intense. The displacement of the tower tip varies greatly with different wind direction angles and is determined by the displacement response extreme value Adverse wind direction angle of 135 ° conditions. Spatial characteristics of spire displacement response spectrum are more sensitive to the mutual interference effect between buildings and the change of wind direction angle, and will affect the vibration response of structures. When the vortex shedding frequency and structure frequency close to the steel tower will cause a large coupling vibration, the design should be taken to avoid the adverse environment, reducing the wind-induced dynamic response.