Abstract This paper focuses on the seismic damage analysis of the whole nuclear power plant (NPP) of AP1000 type during strong seismic sequences. For that purpose, seven synthetic main-aftershocks with three-direction inputs are considered in this study, and the three-dimensional model of whole NPP of AP1000 type suffering from the selected seismic sequences is established. The results indicate that (i) the damage aggravation effect is substantially caused by considering the reinforced concrete auxiliary building (RCAB) for the NPP and is mainly concentrated at the upper intersection between the reinforced concrete shield building (RCSB) and RCAB, especially during beyond design basis earthquake sequences, (ii) concrete damage are greatly developed with increasing PGA, and aggravated by the aftershock, concrete tension damage is more severe than compression damage under earthquake sequences, (iii) the structure residual displacement in three directions are increased by the aftershock, (iv) the average value of the sequence seismic damage dissipation energy is 1.14–1.27 times that of a single earthquake, and the increasing trend of the times is linear.

中文翻译：

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强主余震序列下AP1000型核电站整机损伤发展分析

摘要 本文重点研究了AP1000型核电站(NPP)在强地震序列中的震害分析。为此，本研究考虑了7次三向输入的合成主余震，建立了AP1000型整个核电厂受所选地震序列影响的三维模型。结果表明：（i）核电厂考虑钢筋混凝土辅助建筑（RCAB）造成的损伤加重效应主要集中在钢筋混凝土盾构建筑（RCSB）与RCAB的上部交汇处，尤其是在超设计基准地震序列，(ii) 混凝土损坏随着 PGA 的增加而大大发展，并因余震而加剧，