Earthquake Response Control Method Using Dynamic Interaction among Constituent Structural Systems

在高炉、化工反应器容器或塔、某些烟囱等复杂工业结构的抗震设计中，需要考虑工业设备与其支承框架在地震作用下的动力相互作用。本文研究了动力相互作用对设备与其支承框架之间的最大基底剪力分布、设备与其支承框架之间的最大基底剪力分布、设备与其支承框架之间的最大基底剪力分布、设备与其支承框架之间的最大基底剪力分布以及设备与其支承框架之间的最大基底剪力分布的影响。取决于放置在这两个结构部件之间的阻尼装置的振动能量消耗。应用随机振动理论，得到了简化的相互作用模型的平均峰值响应，该模型放置在由标准功率谱表征的地面加速度激励的基础上。由动态模型的每个结构部件共享的最大摇摆力矩的预期比率作为组成部件和交互弹簧的动态特性的函数而获得，并且整个响应被示出为通过中间阻尼装置来减小。为方便起见，这些结果以图表形式给出，以便确定每个结构构件的合理抗震设计力。

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.