（中国核电工程有限公司， 北京 100840）

［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。

［关键词］核电厂； 隔震结构； 阻尼比； 屈服前刚度； 偏心

中图分类号： TU623.1 文献标识码： A文章编号：  1002-848X(2016)S2-0354-05

Sensitivity of dynamic response of a nuclear power plant isolated structure to calculation parameters

Chen Jian， Sun Xiaoying

（China Nuclear Power Engineering Co., Ltd., Beijing 100840, China）

Abstract: Taking one nuclear safety-related building for example, sensitivity of dynamic response of a nuclear power plant isolated structure to calculation parameters, such as lead rubber bearing (LRB) damping ratio, preyield shear stiffness and eccentricity of isolation layer were studied. Analysis results show that the horizontal displacement due to damping ratio is greater than the influence on the acceleration response. Various uncertainty factors of isolation device should be considered in the design of engineering. For the nuclear plant isolation design and calculation model in this paper, a single preyield shear stiffness values within a certain range of change, the peak acceleration response and displacement are almost no effect, but yield force should be taken into account. Eccentricity of super structure is not influence the dynamic response of isolation structure, and the eccentricity of isolation layer although little impact on the acceleration response of the superstructure, but its influence on displacement response is sensitive, which should be pay more attention in the design of engineering.

Keywords： nuclear power plant; isolation structure; damping ratio; preyield shear stiffness; eccentricity