软岩地基下AP1000核电屏蔽厂房结构地震响应研究

以AP1000核电屏蔽厂房结构为研究对象,进行考虑土-结构相互作用的地震响应分析,探讨不同厚度和不同地表倾斜角度软岩场地对屏蔽厂房结构地震响应的影响。利用ABAQUS有限元软件建立了软岩层厚度分别为25、30、35、40m以及地表倾斜角度分别为0°、3°和6°的土-结构相互作用模型，实现了地震动输入。对计算所得楼层响应谱进行对比分析可知,软岩层较硬岩层对地震传播有一定的放大效应，软岩层厚度的增加会使峰值频率往低频方向移动;倾斜场地对楼层响应谱高频部分有一定的放大效应。该研究结果对软岩场地下核电厂抗震安全评价具有一定参考意义。

Seismic Response of A P1000 Shield Building Structure onSoft Rock Foundation

The AP1000shield building structure model is used as the object of this study, and theseismic response analysis is carried out considering soil-structure interaction (SSI). The influenceof soft rock thickness and ground surface slope on dynamic response of the containment structureis discussed. The soil-structure models with soft rock thicknessesof 25 meters, 30 meters, 35 me-ters and 40 meters and ground surface slopes of 0 degrees, 3 degrees and 6 degrees are establishedrespectively using software ABAQUS. The ground motion input is achieved in our models. Onthe basis of comparison analysis of the calculated floor response spectrum, a certain seismic waveamplification effect can be observed in the soft rock layer than in the hard rock layer. The increaseof the soft rock layer thickness will make the peak frequency move to the low frequency direction.The inclined site has a certain amplification effect on the high frequency part of the floor responsespectrum. The results in this paper have certain referentialsignificance for the construction of nu-clear power plant in the soft rock area.