基于有限元模型修正的预应力混凝土安全壳结构性能评估  

Performance Evaluation of Prestressed Concrete Containment Sturctuce Based on Finite Element Model Updating

作　　者：李忠诚 周艳兵 蓝天云 董占发 熊猛 LI Zhongcheng;ZHOU Yanbing;LAN Tianyun;DONG Zhanfa;XIONG Meng(China General Nuclear Power Design Co.,Ltd.(Shenzhen),Shenzhen 518031,China;Shenzhen Urban Public Safety and Technology Institute Co.,Ltd.,Shenzhen 518038,China;Key Laboratory of Urban Safety Risk Monitoring and Early Warning,Ministry of Emergency Management,Shenzhen 518038,China)

机构地区：[1]深圳中广核工程设计有限公司,广东深圳518031 [2]深圳市城市公共安全技术研究院有限公司,广东深圳518038 [3]城市安全风险监测预警应急管理部重点实验室,广东深圳518038

出　　处：《工业建筑》2022年第10期84-88,77,共6页Industrial Construction

基　　金：国家自然科学基金项目(52192663)。

摘　　要：核电厂安全壳是保障核电机组安全运行的重要实体屏障,打压试验是验证安全壳结构强度和密封性的重要手段,在核电厂建造完成投入使用前,通过打压试验来验证安全壳建造质量和结构性能是否满足设计要求。由于预应力安全壳结构复杂,准确地计算预测安全壳在打压试验下的结构响应较为困难。以某三代核电厂预应力混凝土安全壳为研究对象,基于ANSYS建立了安全壳精细化三维有限元模型,在安全壳预应力张拉和打压试验期间持续监测结构整体变形和应变,并通过预应力钢束分批次张拉期间混凝土应变实测值和计算值的吻合分析,开展有限元模型初始修正。基于修正后的有限元模型,在打压试验前计算预测安全壳在试验压力下的结构变形。打压试验期间的监测实测数据表明:通过上述有限元模型修正方法,可以较为准确地计算预测安全壳在试验压力下的结构性能。The nuclear power plant containment is an important physical barrier to ensure the safe operation of nuclear power units. The Containment Tightness Test(CTT) is an important means to verify the strength and tightness of the containment structure. Before the nuclear power plant is built and put into use, the CTT is used to verify whether the construction quality and structural performance of the containment meet the design requirements. Due to the complexity of the prestressed containment structure, it is difficult to accurately calculate and predict the structural response of the containment under the pressure test. Taking a third generation nuclear power plant as the research object, a refined three-dimensional finite element model of the containment was established based on ANSYS. The overall deformation and strain of the structure were continuously monitored during the prestressed tension and CTT of the containment. The initial analysis parameters of the finite element model were modified through the coincidence analysis of the measured and calculated values of concrete strain during batch tensioning of prestressed tendons. Based on the modified finite element model, the structural deformation of the containment under test pressure were calculated and predicted before the CTT. The monitoring measured data during the CTT showed that the structural performance of the containment under test pressure can be accurately calculated and predicted by the above finite element model modification method.

关 键 词：有限元模型修正 安全壳 预应力混凝土 结构监测 打压试验 

分 类 号：TM623[电气工程—电力系统及自动化] TU378[建筑科学—结构工程]