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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。
In order to study whether the difference of device-structure dynamic interaction at different seismic stages is considered, seismic time-history analysis of small earthquakes, medium earthquakes and large earthquakes in the device-structure interaction system, which is common in building structures, is carried out. The changes of the seismic response to the structure and equipment after considering the interaction under different magnitudes are analyzed. The results show that the seismic response of the structure is obviously different when considering the device-structure dynamic interaction and the interaction is not considered. The seismic response of the device is greatly different and completely distorted. During the major earthquake, both the equipment and the structure have entered into the elasto-plastic stage, and the main parameters such as stiffness have been changed, resulting in a decrease in the impact of dynamic interaction. Although the ratio of the mass of the equipment to the total seismic mass of the structure is small, it still has a great impact on the structural displacement and internal forces.