主余震作用下AP1000核电厂房动态响应与楼层谱研究

基于RG1.60谱选取3条主余震地震序列,研究了主余震作用下核岛厂房模型的动态响应,对比研究了不同主余震序列地震作用下核电厂房楼层谱的影响规律。研究结果表明:主震震级越大,余震对结构的影响越明显,余震的影响还与余震自身的频谱特性有关。同时,主余震作用对核岛厂房水平房的楼层谱影响较大,特别是在结构刚度突然变化的部位影响更显著,应在核电厂抗震设计中予以重视。

Dynamic Response and Floor Response Spectrum of AP1000 Nuclear Island under Mainshock-Aftershock Sequences

Three mainshock-aftershock earthquake sequences based on the RG1.60 spectrum are selected to study the dynamic response of the nuclear island model under the effect of mainshock-aftershock sequences. Additionally, the influence law of floor response spectrum is also investigated and compared. Results show that the larger the magnitude of the mainshock, the more obvious the effect of the aftershock on the structures, and the effect of aftershocks are also related to their own spectral characteristics. Meanwhile, the impact of the earthquake on the nuclear island is mainly horizontal, and the influence is more significant in the part when the structural stiffness changes abruptly, which should be seriously considered in the seismic design of the nuclear island.