| dc.description.abstract | To evaluate the durability of reinforced concrete structures which stored the Low-level radioactive exposed to various aggressive environments, this study established three numerical simulation model, coupled heat-moisture- carbon dioxide transfer model, thermal expansion/contraction model and wetting expansion/drying shrinkage model.
In this study we use subroutine, batch file and ABAQUS which is finite element software to establish coupled heat-moisture- carbon dioxide transfer model, according to the result we can find that the small change of moisture transfer result can create an enormous change to carbon dioxide transfer result. Based on this model, this study chooses moisture diffusivity and moisture boundary condition to run parameters impact analysis, according to the result the change of moisture diffusivity will cause enormous change to the carbon dioxide transfer result.
Basic of the transfer model, this study established thermal expansion/contraction model and wetting expansion/drying shrinkage model. The result shows that thermal expansion/contraction and wetting expansion/drying shrinkage does not make concrete crack. Based on this model, this study chooses moisture contraction coefficient and temperature boundary condition to run parameters impact analysis, according to the result the change of moisture contraction coefficient and temperature boundary condition will cause enormous change to the result of displacement and stress. | en_US |