不同震级作用下的设备 结构动力相互作用体系地震反应分析

为研究是否考虑设备 结构动力相互作用在不同地震阶段的差别，对建筑结构中常见的设备 结构相互作用体系进行了小震、中震和大震阶段的地震时程反应分析。分析了不同震级作用下考虑相互作用后给结构与设备的地震反应带来的变化。结果表明：考虑设备 结构动力相互作用与不考虑相互作用相比，结构的地震反应有较明显的区别，设备的地震反应有很大的区别，处于完全失真的状态。大震阶段由于设备和结构均进入了弹塑性阶段，刚度等主要参数发生了变化，导致动力相互作用的影响降低。虽然设备质量占结构总地震质量的比例很小，但仍会对结构位移与内力造成较大的影响。

Response Analysis of Equipment Structure Dynamic Interaction Under Different Earthquake Phases

Time history analysis of the equipment structure systems was conducted under the small, middle and big earthquake, to study the differences with and without considering equipment structure dynamic interaction. The impacts of equipment structure interaction to the dynamic response of structure and equipment was analyzed. The results indicate that: The dynamic response of structure is obviously different when considering and without considering equipment structure interaction. The impacts on equipment is much bigger than on structure, which makes equipment in a state of complete distortion. When under big earthquake, the non linearity of the equipment and structure will decline the equipment structure dynamic interaction between them. Although the proportion of equipment is very small in the total mass, the interaction still has a great influence on the structural displacement and internal force.