【摘要】 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。更多还原

【Abstract】 The main workshop structure of nuclear power plant has the characteristics of uneven distribution on mass and stiffness. It is important particularly to research the elastic-plastic seismic response analysis on the main workshop to ensure the normal operation of power plant in rare earthquake,prevent serious property damage and casualties caused by major equipment damage and nuclear leakage. Taking a practical project as the research object,this paper used the large general finite element software ABAQUS,in which the fiber model was used,to research the structural seismic performance under rare earthquake and the deformation and mechanical characteristics of elastoplastic model throughout the earthquake effect, then the effectiveness and feasibility of the method was verified,on the basis of the structural dynamic characteristics and response spectrum analysis. The analysis results show that the structural maximum interlayer displacement angle can meet the demands of 1 /100 limit; the seismic fortification standard of "no collapse under strong earthquake"can be achieved in rare earthquake with Ms7. 0,which can provide important basis for the seismic design of main workshop structure in nuclear power plant.更多还原