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（中國(guó)核電工程有限公司， 北京 100840）

［摘要］以某核電站廠房隔震結(jié)構(gòu)設(shè)計(jì)為例，針對(duì)鉛芯橡膠支座阻尼、屈服前剛度值以及隔震結(jié)構(gòu)偏心等三類參數(shù)分別進(jìn)行了隔震結(jié)構(gòu)動(dòng)力響應(yīng)的敏感性分析，分析結(jié)果表明，隔震層阻尼大小對(duì)于隔震結(jié)構(gòu)位移的影響程度遠(yuǎn)大于對(duì)加速度響應(yīng)的影響，工程設(shè)計(jì)中應(yīng)考慮隔震裝置阻尼取值的多種不確定性因素；對(duì)于文中核島廠房所采用的隔震設(shè)計(jì)方案及計(jì)算模型，單一考慮屈服前剛度取值在一定范圍內(nèi)變化，其對(duì)隔震結(jié)構(gòu)水平向加速度響應(yīng)和峰值位移幾乎無(wú)影響，但還應(yīng)綜合考慮屈服力等其他參數(shù)的影響；上部結(jié)構(gòu)自身的偏心與否對(duì)隔震結(jié)構(gòu)的動(dòng)力響應(yīng)影響很小，而隔震層偏心雖然對(duì)上部結(jié)構(gòu)的加速度響應(yīng)影響很小，但其對(duì)位移響應(yīng)的影響則較為敏感，工程設(shè)計(jì)中應(yīng)特別關(guān)注隔震層偏心問(wèn)題。

［關(guān)鍵詞］核電廠； 隔震結(jié)構(gòu)； 阻尼比； 屈服前剛度； 偏心

中圖分類號(hào)： TU623.1 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)：  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