【摘要】 本文通过对稳态反应随时间变化规律的分析和预测，将半无限大弹性地基上高层建 筑结构对多维确定性动力作用的稳态反应问题转化成了常微分方程组的边值问题。通过对某 一高层筒中筒结构的分析计算，得出了相当合理的结论：那就是当激励荷载的频率与结构系 统的自振频率很接近时，结构的反应会出现非常大的突变。更多还原

【Abstract】 The steady-state response Problems of tall building structures on semi-infinite elastic subgrade, subjected to multi-dimensional deterministic dynamic loads, were converted into the boundary problems of ordinary differential equations by means of analyzing and predicting the time-varying property of the steady-state responses in the paper. A reasonable conclusion was drawn from the rend of an example of a tube-in-tube tall building structure. It is found that the response of the structure experiences enormous increment when the frequency of the excitation load is very dose to the natural frequency of the structure.更多还原