【摘要】 本文通过对带有双塔楼的高层建筑结构动力特性的分析研究，证明在地震作用下这类结构存在五种基本的振动形式，当按现行建筑抗震设计规范理论计算地震作用时，其中有三类振型对结构的内力与位移没有贡献，因而在实际工程中此类结构可以用简单的力学模型进行计算分析。本文算例给出的结果与理论推导完全一致。更多还原

【Abstract】 Through three-dimensional analytical research, it has been testified that there are five fundamental vibration modes in symmetrical tall building with two towers. However, three of them make no contribution to internal forces and displacements of the structures under two-dimensional ground motion as computed theoretically in accordance with the Chinese aseismic design code.Hence, in practice, the earthquake response analysis of the structure can be carried out conveniently by use of simple mechanical model. Numerical example shows that the results are in good agreement with the argument presented in this paper.更多还原