NONLINEAR FINITE ELEMENT ANALYSIS OF 1:10 CONTAINMENT MODEL STRUCTURE SUBJECTED TO INTERNAL PRESSURE

Nonlinear finite element analysis of 1:10 advanced nuclear power plant prestressed concrete containment model structure subjected to internal pressure is carried out. Comparison between the analytical radial displacements and the experimental radial displacements shows that the analytical model and parameters are reasonable. Because of prestressing, the model structure is under compression till internal pressure is up to 0.6MPa, and it satisfies the design requirement. The radial displacement between 1.5m and 3.0m model height is larger than that at other level, and the radial displacement at about 2.0m height is the maximum. The radial displacement near 63.24° section along model circle is larger than that at other sections. Ultimate inner pressure of the model structure is 1.34MPa, and is 3.35 times of the design value. Analysis of the model structure shows that the newly developed containment is safe under the given inner pressure.