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 corner wall of the CA structural is critical under load

so it is important to do research on bearing capacity of CA corner wall.Purpose: Finite element analysis model of the CA corner wall is conducted in the ABAQUS software to study the bearing capacity and the stress/strain state of the CA corner 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 corner wall.Results: The ultimate bearing capacities of the CA corner wall in different loads are studied

and the study also gets the load-displacement curves.The bearing capacities of CA corner wall under different axial loads are also studied in this paper.The influence of ultimate bearing capacities of CA corner wall is founded out if the steel and concrete work together.Conclusions: When the CA corner wall subjects to the bending load

the failure part of the CA corner wall is the corner core concrete.When the CA corner wall subjects to the shear load

the failure part of the CA corner wall is the straight module wall.The axial load has notable influence on the capacity of CA corner wall.