Abrahamson相干模型对核电站构筑物埋置地下部位抗震响应的影响

The Impact of the Abrahamson Spatial Coherency Models on the Seismic Response of the Embedded Part of Nuclear Island Structures

本文采用Abrahamson的空间相干性模型,并考虑基础埋置效应,针对硬岩、软土厂址对核电站构筑物开展空间相干性地震反应谱分析,评估其非一致性对于埋置部位的地震响应谱影响情况,并得出对于低频区段地面的空间非一致性影响反应谱程度与埋置面接近;而高频区段地面的空间非一致性影响反应谱程度比埋置面要大的结论。

In this paper, the Abrahamson spatial coherence models, respectively of hard- rock site and soft-soil site, are used on seismic floor response spectrum analysis of the embedded part of nuclear power plant structures. Comparisons of impact results are shown and the impact of the incoherency on the embedded part in different frequency bands for seismic response spectra is evaluated, and it is concluded that the embedded incoherency is similar to the surface incoherency at low frequency and less than the surface incoherency at high frequency on seismic response for nuclear power plants.