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本文采用随机振动复模态理论，推导了三维非平稳地震载荷作用下电视塔结构的内力演变谱密度计算公式，并对洛阳电视塔、上海东方明珠电视塔的内力演变谱密度特性进行了计算研究。结果表明，洛阳电视塔与东方明珠电视塔的内力演变谱密度特性具有很大的差别，结构的高阶振型及结构的互谱密度对结构的内力具有较大的影响，因此结构的抗震设计应综合考虑这些因素对结构内力的影响效应。
In this paper, the formula of internal force evolution spectrum density of TV tower under three-dimensional non-stationary seismic loading is deduced by using random vibration complex mode theory. The internal force evolution spectral density characteristics of Luoyang TV Tower and Shanghai Oriental Pearl TV Tower are calculated and studied. The results show that there are great differences between the internal force evolutions of Luoyang TV Tower and Oriental Pearl TV Tower. The high-order mode shapes and the cross-spectral density of the structure have a great influence on the internal forces of the structure. Therefore, the seismic design of structures should be considered synthetically The effect of these factors on the internal forces of structure.