本文针对高层建筑楼顶钢塔的风振效应开展研究，采用线性滤波法模拟了结构的脉动风荷载时程，探讨了主体结构、楼顶钢塔及二者整体工作三种情况的动力特性，分析了脉动风速谱、频率比、楼顶钢塔高度和跨度等6种不同参数对结构顺风向风振动力性能的影响，并对比分析了线性和非线性粘滞阻尼器及粘弹性阻尼器三种速度相关型阻尼器对结构楼顶钢塔风振效应的控制效果。结果表明，结构楼顶钢塔设计时应避开主体结构的前三阶自振频率，以降低鞭梢效应；风荷载作用下楼顶钢塔的风振响应远大于主体结构，随基本风压和钢塔高度的增大而增大，但随钢塔跨度的增大而减小；阻尼器可有效衰减楼顶钢塔的风振响应，粘滞阻尼器对楼顶钢塔风振响应的减振效果优于粘弹性阻尼器，而非线性粘滞阻尼器的减振效果又优于线性粘滞阻尼器。

In this paper, wind-induced vibration responses of high-rise building with steel tower protrusion are studied. AR model is introduced and adopted to simulate fluctuating wind time-series. Dynamic characteristics of main structure, steel tower protrusion and structure with the protrusion in along-wind action are discussed. Influences of six kinds of parameters, such as wind power spectrum, frequency ratio, basic wind pressure and so on, to structural steel tower protrusion are also discussed. Control effects of velocity-dependent dampers to wind–induced vibration responses of the steel tower protrusion are studied comparatively. The study results show that natural frequency of the steel protrusion should be away from the first three frequencies of the main structure so as to reduce whiplash effect. The wind-induced vibration responses of the steel tower protrusion are greater than that of the main structure and will be increase with rise of basic wind-pressure and height of the protrusion, but decrease with rise of span of the protrusion. Velocity-dampers can reduce wind responses of the protrusion effectively. The vibration effect of viscous dampers to the wind responses of the protrusion is better than that of viscoelastic dampers and the vibration effect of nonlinear viscous dampers is better than that of linear viscous dampers.