| Concrete can be regarded as a three-phase heterogeneous body, composed of coarseaggregate, cement mortar and their combination. Based on the modal test method,dynamic characteristics of the radiation shielding concrete and its each phase materialswere studied. Combined with the finite element software ABAQUS, microstructure ofbarite concrete and magnetite concrete were simulated using random aggregate model,numerical simulation analysis of dynamic properties of two kinds of radiation concretewere taken out. The following were the main research work and innovationachievements:1. Study on dynamic properties of barite concrete and magnetite concrete weretaken out, and frequency, damping ratio, transfer function were abtained. Barite concreteand magnetite concrete damping ratio were between0.35~1.0%. Comparing with theexisting C30ordinary pebble concrete, the damping ratio of barite concrete and magnetiteconcrete is less than that of common one.2. Take radiation concrete as a three-phase heterogeneous body, composed ofcoarse aggregate, cement mortar and their combination. Dynamic performance ofradiation shielding concrete beam were simulated based on the concrete randomaggregate model, and the curves of the dynamic performance of the overall radiationshielding concrete beam specimens with three-phase material parameters were obtained.Results show that, damping ratio radiation shielding concrete increase with thethree-phase material damping ratio. |
PDF Full Text Request