AP1000核电厂CA模块转角部位承载力分析

Analysis of bearing capacity of CA corner wall in AP1000 nuclear power plant

基于ABAQUS有限元分析软件,对AP1000核电厂中的CA模块转角部位在不同内力工况下进行了详细的有限元分析,分析研究了CA模块转角部位在不同内力工况下的破坏部位及破坏状态,得到了不同内力工况下CA模块转角部位的承载力—位移曲线及极限承载力。分析研究了轴向力对结构模块转角部位的承载力的影响,以及模块中剪力钉的受力特性,对钢板与混凝土的共同受力进行了研究,对结构模块的分析提出了建议。

Background： The module construction technology is widely used in the AP1000 nuclear power plant. The CA structural module in the containment building is important for the safety of the nuclear power plant, the comer wall of the CA structural is critical under load, so it is important to do research on bearing capacity of CA comer wall. Purpose： Finite element analysis model of the CA comer wall is conducted in the ABAQUS software to study the bearing capacity and the stress/strain state of the CA comer wall under different load cases. Methods： Finite element analysis model considering the material nonlinearity, contact nonlinearity and geometric nonlinearity conducted in the ABAQUS software is used for the analysis of the CA comer wall. Results： The ultimate bearing capacities of the CA comer wall in different loads are studied, and the study also gets the load-displacement curves. The bearing capacities of CA comer wall under different axial loads are also studied in this paper. The influence of ultimate bearing capacities of CA comer wall is founded out if the steel and concrete work together. Conclusions： When the CA comer wall subjects to the bending load, the failure part of the CA comer wall is the comer core concrete. When the CA comer wall subjects to the shear load, the failure part of the CA comer wall is the straight module wall. The axial load has notable influence on the capacity of CA comer wall.