某核电站结构-设备相互作用的地震反应分析

Seismic Response Analysis of Structures in a Nuclear Power Plant-Equipment Interaction

为研究核电站结构-设备相互作用的地震反应,针对某高温气冷堆核电站反应堆进行结构与设备相互作用的地震反应分析研究,通过对考虑与不考虑结构-设备相互作用的模型进行对比,开展模态分析、设计基准地震动下和超设计基准地震动下的动力特性分析以及楼层反应谱分析,结果表明:考虑剪力墙主体结构与设备的相互作用后,结构的地震反应减小,层间剪力最大减小60%,水平向楼层反应谱峰值减小为不考虑相互作用时的40%,提高了结构与设备的安全性,并为设备抗震设计提供依据。但竖向楼层反应谱在结构竖向周期附近有放大作用,建议在设备抗震设计时予以注意。

To study the seismic response of structure-equipment interaction in nuclear power plants, we studied the seismic response of the reactor structure and equipment interaction on a HTGR nuclear power plant. By comparing the results between the interaction model and non-interaction one, we analyzed dynamic characteristics of structure and the floor response spectrum under design ground motion, dynamic characteristics of structure under super design ground motion. The results show that with consideration of the interaction of shear wall, the structure reduces the seismic response and the floor shear force has been reduced 60%, and the floor response spectrum peak reduced to 40%. However, the vertical floor response spectrum in the vertical period of the structure has effect of amplification. It is suggested that designer should pay great attention to the seismic design of the equipment, which could improve safety of the structure and equipment, and provide a base for seismic design of the equipment.