欧洲压水堆核电站安全壳钢衬里模块化施工力学研究（英文）

发布时间：2018-06-22 23:51

本文选题：安全壳 + 施工力学　；参考：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2017年06期

【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。
[Abstract]:Objective: To study the key mechanical problems in the whole process of modular construction of steel lining structure in Guangdong Taishan European PWR (EPR) nuclear power station, and give some suggestions on the mechanic angle of the modular construction technology of steel lining structure, which can be used to determine the construction scheme and ensure the safety of the construction. Value. Innovation: 1. refining the key mechanical problems in the whole process of modular construction of steel lining structure of EPR nuclear power station; 2. using "overlap unit and life and death unit" technology to simulate the whole process of concrete pouring of large complex structure. Method: 1. through finite-element analysis, lifting structure optimization analysis, hanging ear The multi-scale finite element analysis and wind speed analysis of the joint are made. 2. the finite element model of the complex entity of the containment structure is established, and the influence of the construction factors such as the initial internal force of the assembly, the new concrete side pressure, the uneven temperature action and the wind load on the cylinder liner, and 3. the analysis of the "overlapping unit and the life and death unit" technology. The structural deformation and stress of the large span dome steel lining structure during the whole process of concrete pouring; 4. considering the influence of the initial geometric defects and material elastoplasticity of the structure, the stability analysis of the steel lining structure of the dome during the concrete pouring process is analyzed. Conclusion: 1. using the triangular ring truss hoisting tooling can satisfy the hoisting. The requirements of the stress and deformation of the process and the reduction of the steel amount of the hoisting tooling are reduced; 2. the correlation curves of the height of the liner module and the maximum height of the concrete are obtained. 3. the mechanical properties of the steel lining structure of the dome are obtained in the whole process of concrete pouring, and 4. defines and checks the steel lining of the dome during the casting process of the concrete. The stability of the two key stages provides a theoretical reference for the construction of such structures.
【作者单位】： Key
【基金】：Project supported by the China State Construction Engineering Corporation Funded Project(No.CSCEC-2008-Z-17) the National Natural Science Foundation of China(No.51308155) the Fundamental Research Funds for the Central Universities of China(No.HIT.NSRIF.2014100) the China Postdoctoral Science Foundation Funded Project(Nos.2013M541389 and 2015T80355)
【分类号】：TM623.91;TU745.7

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