张拉整体塔的结构特性及风振研究

本文在已有研究的基础上,以一座实用型张拉整体电视塔为例,对张拉整体塔的某些结构特性、抗风性能及施工进行了探索和研究。首先介绍了张拉整体塔的结构特性,主要包括:张拉整体塔的迎风面积、不同预拉力下的刚度、不同方向上的刚度及其自振特性与预拉力的关系。基于随机振动理论,运用谐波叠加法模拟了作用在结构上的脉动风,进而计算得到了张拉整体塔的风振响应,并进行了深入的谱分析,按照规范进行了抗风验算。然后比较分析了静力计算和动力计算的结果。

Study on Wind-induced Vibration and Structure Characteristics for Tensegrity Tower

Based on the existing research findings and taking a virtual tensegrity TV tower as example, some of its structure characteristics, its wind resistance capacity and its construction were explored and analyzed. Some of its characteristics were introduced firstly which include its windward area, stiffness with different pretension, stiffness in different directions, relationship between dynamic behavior and pretension. Based on the theory of random vibration and system, and with the help of the WAWS method, the fluctuating wind loads on the structure were simulated. Then wind-induced response in time domain for this tensegrity tower was obtained and the spectral analysis of the results was done deeply, and furthermore its wind resistance capability was checked according the current designing code. At last, the differences in the results of static and dynamic analysis were compared and analyzed.