某核电厂隔震结构动力响应的参数敏感性分析

发布时间：2018-04-28 18:49

本文选题：核电厂 + 隔震结构　；参考：《建筑结构》2016年S2期

【摘要】：以某核电站厂房隔震结构设计为例,针对铅芯橡胶支座阻尼、屈服前刚度值以及隔震结构偏心等三类参数分别进行了隔震结构动力响应的敏感性分析,分析结果表明,隔震层阻尼大小对于隔震结构位移的影响程度远大于对加速度响应的影响,工程设计中应考虑隔震装置阻尼取值的多种不确定性因素;对于文中核岛厂房所采用的隔震设计方案及计算模型,单一考虑屈服前刚度取值在一定范围内变化,其对隔震结构水平向加速度响应和峰值位移几乎无影响,但还应综合考虑屈服力等其他参数的影响;上部结构自身的偏心与否对隔震结构的动力响应影响很小,而隔震层偏心虽然对上部结构的加速度响应影响很小,但其对位移响应的影响则较为敏感,工程设计中应特别关注隔震层偏心问题。
[Abstract]:Taking the isolation structure design of a nuclear power plant as an example, the sensitivity analysis of the dynamic response of the isolated structure is analyzed by three kinds of parameters, such as the damping of lead rubber bearing, the stiffness value before the yield and the eccentricity of the isolation structure, respectively. The results show that the impact of the damping size of the isolation layer on the displacement of the isolated structure is far greater than the response to the acceleration response. In the engineering design, a variety of uncertainties should be taken into consideration in the design of the damping value of the isolation device. The isolation design scheme and the calculation model used in the nuclear power plant in this paper only consider the variation of the pre yield stiffness in a certain range, and have little effect on the acceleration response and peak displacement of the isolation structure, but it should also be comprehensive. Considering the influence of other parameters such as yield force, the eccentricity of the superstructure has little influence on the dynamic response of the isolated structure, while the eccentricity of the isolation layer has little influence on the acceleration response of the superstructure, but its influence on the displacement response is more sensitive. The eccentricity of the isolation layer should be paid special attention to in the engineering design.

【作者单位】：中国核电工程有限公司;
【基金】：中国核工业集团三代核电技术升级项目科研课题
【分类号】：TU352.12

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