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将基础隔震技术应用于核电厂的设计和建造,不仅可以实现上部结构和内部设备、管道的标准化设计,缩短设计和建造周期,提高核电厂建设的经济性,而且可以提高结构的抗震裕度,有效抵抗超过设防烈度的地震动。为此,该文分别采用传统橡胶隔震支座和厚层橡胶隔震支座,制作传统水平基础隔震模型和三维基础隔震模型,结合油阻尼器控制核电厂结构的地震响应。通过振动台试验和数值模拟,对比了隔震模型和非隔震模型在时域和频域的地震响应。研究表明,在水平方向,两种隔震结构的水平加速度相对于非隔震结构均可以降低约50%;在竖直方向,三维隔震结构的楼层反应谱峰值向低频2Hz~3Hz移动,避开了设备和管道的主频率范围10Hz~20Hz,即可以实现设备和管道的竖向隔震。同时,试验和分析均证明对隔震层附加约为15%的水平阻尼比,可以有效降低结构的地震响应,并使水平楼层反应谱峰值减小约50%。
The application of base isolation technology to the design and construction of nuclear power plants can not only realize the standardized design of superstructure and internal equipment and pipes, shorten the design and construction cycle, improve the economy of nuclear power plant construction, but also improve the seismic resistance of the structure , Effectively resist the earthquake intensity of fortification. For this reason, the traditional horizontal base isolation model and three-dimensional base isolation model are made by using traditional rubber bearings and thick rubber bearings separately. The oil damper is used to control the seismic response of nuclear power plant structure. Through the shaking table test and numerical simulation, the seismic responses in both time and frequency domains of the isolated and non-isolated models are compared. The results show that in the horizontal direction, the horizontal accelerations of the two kinds of isolation structures can be reduced by about 50% relative to those of the non-isolated structures. In the vertical direction, the peak of the response spectrum of the three-dimensional isolation structure moves from 2Hz to 3Hz, avoiding Opened equipment and pipes of the main frequency range of 10Hz ~ 20Hz, which can achieve vertical isolation equipment and pipelines. At the same time, experiments and analysis all prove that adding about 15% horizontal damping ratio to the isolation layer can effectively reduce the seismic response of the structure and reduce the peak value of the horizontal floor response spectrum by about 50%.