核电厂隔震结构的振动台试验研究

发布时间：2019-01-03 11:07

【摘要】：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%。
[Abstract]:The application of base-isolation technology to the design and construction of nuclear power plants can not only realize the standardized design of superstructures and internal equipment and pipelines, shorten the design and construction cycle, and improve the economy of nuclear power plant construction. Furthermore, the seismic margin of the structure can be improved, and the ground motion beyond the fortification intensity can be effectively resisted. For this reason, the traditional rubber isolation support and thick layer rubber isolation support are used to make the traditional horizontal foundation isolation model and the three-dimensional foundation isolation model, respectively, and the oil damper is used to control the seismic response of the nuclear power plant structure. The seismic responses of the isolated model and the non-isolated model in time domain and frequency domain are compared by shaking table test and numerical simulation. The results show that in the horizontal direction, the horizontal acceleration of the two isolation structures can be reduced by about 50% compared with that of the non-isolated structure. In the vertical direction, the peak value of the floor response spectrum of the three-dimensional isolated structure moves to the low frequency 2Hz~3Hz, avoiding the main frequency range of 10 Hz ~ 20 Hz of the equipment and pipeline, that is, the vertical isolation of the equipment and the pipeline can be realized. At the same time, the test and analysis show 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 parts.
【作者单位】：中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室;哈尔滨工程大学航天与建筑工程学院;
【基金】：地震行业科研专项经费项目(201208013) 中央级公益性研究所基本科研业务费专项项目(2010B04) 国家自然科学基金项目(51008287)
【分类号】：TU352.12

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