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核电厂主厂房结构具有质量、刚度分布不均等特点,为了保证电厂运行功能在罕遇地震下不中断,避免重大设备损坏和核泄漏而造成的严重财产损失和人员伤亡,对核电厂主厂房结构进行弹塑性地震响应分析显得尤为重要。以某实际工程为研究对象,在结构的动力特性和反应谱分析的基础上,采用基于纤维模型理论的大型通用有限元软件ABAQUS对核电厂主厂房结构的抗震性能进行了分析,研究了弹塑性模型在整个地震作用过程中的变形及受力特点,并验证了整个方法的有效性和可行性。分析结果表明:结构最大层间位移角满足规范1/100的限值要求,结构在7度罕遇地震作用下能够满足“大震不倒”的设防要求,可为核电厂主厂房结构的抗震设计提供依据。
In order to ensure the operation of power plant under uninterrupted rare earthquakes and avoid serious property damage and casualties caused by major equipment damage and nuclear leakage, the structure of the main plant of a nuclear power plant is characterized by uneven distribution of rigidity and quality. Elastic-plastic seismic response analysis is particularly important. Taking a practical engineering as the research object, based on the dynamic characteristics and response spectrum analysis of the structure, a large general finite element software ABAQUS based on the fiber model theory is used to analyze the seismic performance of the main plant structure of a nuclear power plant. The deformation and force characteristics of the model during the whole earthquake process verify the effectiveness and feasibility of the whole method. The results show that the maximum displacement angle of the structure satisfies the limit of 1/100 of the specification. The structure can meet the requirement of “Great Burst” under the severe earthquake of 7 degrees, Seismic design to provide the basis.