Response Simulation of 1/4 Scale Prestressed Concrete Containment Vessel Model

摘要

Under the ultimate internal pressure the nuclear reactor containment exhibits non-symmetrical and non-linear behavior.This is due to the structure having non-symmetric factors such as buttresses, penetrations and tendon layout in the dome.Therefore, the behavior of the structure under ultimate pressure should be assessed with a three dimensional model whichconsiders the non-symmetry. In this study, an assessment method using the 3D global model is proposed. In order to simulatethe real behavior of the prestressed concrete containment vessel, two numerical models - an axisymmetric model and a threedimensionmodel - are refined by comparison of the analysis results and with existing research results. In the analysis ofprestressed concrete containment, exhibiting highly nonlinear behavior, both Menetrey-Willam' s concrete failure criteria andmodified Drucker-Prager' s concrete failure criteria are introduced to the finite element models. In accordance with Smith' sresearch results, non-associated plastic flow rules are applied for the concrete material model.