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运用SAP2000软件建立了河南电视塔的杆系三维有限元模型,利用谐波合成法并考虑塔式结构风速谱随竖向变化的特点,模拟了该电视塔多变量互相关脉动风荷载时程曲线,并对该塔整体模型、天线段部分及主体结构部分分别进行了模态分析及风荷载作用下的风振动力响应时程分析。结果表明,附加天线桅杆后,其振动对主体结构的振动形式在低频段影响较小,在高频段该塔的运动形式改变较大,高振型的影响不可忽视;河南电视塔作为一超高全钢结构塔,风荷载作用下动力反应较大,由于天线段高柔,附加天线桅杆后整体结构的自振周期明显增加,从而产生了较强的鞭梢效应,却在一定程度上减小了塔楼的加速度。
Using SAP2000 software to establish the three-dimensional finite element model of the Henan TV Tower rod system, by using the method of harmonic synthesis and taking into account the characteristics of the wind speed spectrum of the tower structure with the vertical change, the multivariate cross-correlation wind load time history curve The modal analysis and the time-history analysis of wind-induced vibration response under the wind load were carried out for the whole tower model, the antenna section and the main structure. The results show that after the additional antenna mast, the vibration of the main structure of the form of vibration in the low frequency band less affected at high frequency changes in the tower form of movement, the impact of high mode can not be ignored; Henan TV Tower as a high-all-steel Due to the high softness of the antenna section, the natural period of the whole structure after the additional antenna mast is obviously increased, resulting in a strong whiplash effect, but to a certain extent, the turbulence of the tower, Acceleration.