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Journal of Zhejiang University-SCIENCE A

, Volume 18, Issue 6, pp 467–486 | Cite as

Modular construction mechanics of a European pressurized reactor steel containment liner

  • Jia-chuan Yan
  • Xiao-fei Jin
  • Feng Qin
  • Zheng Li
  • Feng Fan
  • Jin-ping Ou
Article
  • 43 Downloads

Abstract

A European pressurized reactor (EPR) steel containment liner structure is comprised of the cylinder part and the dome part. An introduction of the steel liner structure is presented, followed by studies on the key mechanical features of the construction process using a refined finite element method. The steel liner was divided into several modules and then assembled during construction. Firstly, the equipment structure used to hoist the liner module was optimized, the lifting lug was analyzed using a multi-scale finite element model; the wind speed limit during lifting was also studied. Subsequently, the effect of internal forces during assembly between the liner modules, the lateral pressure of fresh concrete, the non-uniform temperature load, and the wind load on the cylinder module was analyzed. According to the time-varying structural performance during continuous concrete pouring and the hardening construction, an “overlapping element and birth-death element” technique was adopted to analyze the deformation and stress of the long-span steel dome liner. In addition, the stability-bearing capacities of the dome structure during construction were also studied, which took into consideration the effect of the initial geometrical imperfections and the elasto-plasticity of the material. This study presents a reference in terms of the mechanics of the construction scheme and the safety of such a type of structure.

Key words

Containment Construction mechanics Steel liner Overlapping element Birth-death element 

欧洲压水堆核电站安全壳钢衬里模块化施工力学研究

摘要

目 的

以广东台山欧洲压水堆(EPR)核电站安全壳钢衬里结构为研究背景,提炼钢衬里结构模块化施工全过程中的关键力学问题,对钢衬里结构模块化施工技术从力学角度给出建议,对确定结构施工方案和保证结构施工安全具有实用参考价值。

创新点

1. 提炼出EPR 核电站安全壳钢衬里结构模块化施工全过程中的关键力学问题;2. 采用“重叠单元和生死单元”技术模拟大型复杂结构混凝土浇筑成型全过程。

方法

1. 通过精细化有限元分析,开展吊装工装结构优化分析、吊耳节点多尺度有限元分析和工作风速分析;2. 建立安全壳结构复杂实体有限元模型,分析模块之间对接拼装初内力、新浇筑混凝土侧压力、不均匀温度作用及风荷载等施工因素对筒体钢衬里的影响;3. 采用“重叠单元和生死单元”技术,分析大跨度穹顶钢衬里结构在混凝土浇筑成型全过程中的结构变形和应力;4. 考虑结构初始几何缺陷和材料弹塑性的影响,对混凝土浇筑成型过程中穹顶钢衬里结构进行稳定性分析。

结论

1. 采用三角形环形桁架吊装工装,能够满足吊装过程的应力和变形要求,并减少吊装工装用钢量;2. 获得了筒体钢衬里模块高度和混凝土一次浇筑最大高度的相关曲线;3. 得到了混凝土浇筑成型全过程中穹顶钢衬里结构的力学性能;4. 定义并验算了混凝土浇筑成型过程中穹顶钢衬里结构两个关键阶段的稳定性,为此类结构施工提供了理论参考。

关键词

安全壳 施工力学 钢衬里 重叠单元 生死单元 

CLC number

TU393.3 

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Copyright information

© Zhejiang University and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Jia-chuan Yan
    • 1
    • 2
  • Xiao-fei Jin
    • 3
  • Feng Qin
    • 4
  • Zheng Li
    • 5
  • Feng Fan
    • 1
    • 2
  • Jin-ping Ou
    • 1
    • 2
  1. 1.Key Lab of Structures Dynamic Behavior and Control of the Ministry of EducationHarbin Institute of TechnologyHarbinChina
  2. 2.School of Civil EngineeringHarbin Institute of TechnologyHarbinChina
  3. 3.China Construction First Engineering Division Corporation LimitedBeijingChina
  4. 4.Country GardenFoshanChina
  5. 5.China Construction Second Engineering Bureau Nuclear Power Plants BranchShenzhenChina

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