地基土-反应堆厂房-核电辅助厂房结构相互作用体系地震响应分析

土-结构相互作用分析是核电结构抗震设计的重要环节，考虑到附属厂房可能导致反应堆厂房处于最不利工况状态，对地基土-反应堆厂房-核电辅助厂房结构相互作用体系地震响应进行研究。基于PASSI算法，提出显-隐式单元层计算方法，实现显、隐式交替计算，保持高效性的同时，提高计算稳定性。通过场地分析算例和土-结构相互作用分析算例，与ABAQUS软件计算结果进行对比，验证计算方法的可行性。以某核电站为对象，分析同一基础上相邻厂房对反应堆厂房地震响应的影响。研究结果表明，在基岩场地上，安全厂房通过基础和场地对反应堆厂房的作用较小，对反应堆厂房地震响应的影响较小；地震动输入下，燃料厂房和电器厂房加大了反应堆厂房位移峰值，减小了反应堆厂房加速度反应谱峰值，并使反应堆厂房顶部点加速度反应谱峰值向高频移动；与反应堆厂房共用同一基础的辅助厂房，应与反应堆厂房作为整体进行地震响应分析，至少应将与反应堆厂房相连的辅助厂房作为整体进行分析。

Earthquake Response Analysis of Soil-reactor Plant-nuclear power Auxiliary Plant Interaction System

Soil-structure interaction analysis is an important step in seismic design, Considering that the existence of the auxiliary plant may cause the reactor plant in the most unfavorable condition, In the paper the coupled dynamic response of soil- reactor plant-auxiliary plant structure system to earthquake excitation is studied. Based on PASSI, a computation scheme of explicit and implicit element layer is proposed, which can realize explicit and implicit computation alternately, and improve the computation stability with high efficiency. The site analysis and soil-structure interaction analysis examples were compared with the results of ABAQUS commercial software, and the feasibility of the calculation scheme was verified. On this basis, the influence of adjacent plants on the seismic response of a nuclear power plant on the same basis was analyzed. The results show that on the bedrock site, the safety plant has little effect on the reactor plant through the foundation and site, It also has little effect on the seismic response of the reactor plant. Under the seismic wave input, the fuel and electrical plant increased the displacement peak of the reactor plant, reduced the peak of the acceleration response spectrum, and made the peak of the acceleration response spectrum of the top point of the reactor plant move to high frequency. The auxiliary plant sharing the same foundation with the reactor plant should be analyzed holistically, and at least the auxiliary plant connected with the reactor plant should be analyzed holistically.