Earthquake Response Control Method Using Dynamic Interaction among Constituent Structural Systems

在复杂工业结构的抗震设计中，如高炉、化学反应器容器或塔、某些类型的烟囱等，应考虑工业设备与其支撑框架在地震作用下的动力相互作用。本文旨在考察动力相互作用对设备及其支撑框架之间的最大底部剪力分布的影响，以及对放置在这两个结构部件之间的减振装置的振动能量消耗的影响。应用随机振动理论，得到了以标准功率谱为特征的地面加速度激励下的简化相互作用模型的平均峰值响应。得到了动力模型中各结构构件所分担的最大摇摆力矩的期望值比作为构件动力特性和相互作用弹簧的函数，并证明了中间阻尼器对整体响应的减小作用。为便于确定各结构构件的合理抗震设计力，这些结果以图形的形式给出。

Dynamic interaction between industrial equipment and their supporting frames during earthquakes should be taken into account in the earthquake resistant design of complex industrial structures such as blast furnaces, chemical reactor vessels or towers, certain kinds of stacks, and so on. This paper aims to examine the effects of dynamic interaction, firstly on the maximum base shear distribution between equipment and their supporting frames, secondly, on the vibratory energy consumption of the damping devices placed between these two structural components. The random vibration theory is applied to obtain the average peak responses of simplified interaction models placed on a base which is being stimulated by ground acceleration characterized by the standard power spectrum. The expected ratio of maximum rocking moment shared by each structural component of the dynamic model is obtained as the function of dynamic characteristics of constituent components and the interaction spring, and the whole response is shown to be reduced by the intermediate damping devices. These results are presented graphically for convenience so as to determine the rational aseismic design forces for each structural component.