Expansive chemical reactions as Internal Sulphate Attack and Alkali-Silica Reaction are degradation phenomena that, under specific conditions, develop inside concrete structures. Concrete dams have been frequently diagnosed with such issues. Expansive reactions proceed for long time and eventually lead to different forms of deterioration and damage. Amongst the latter ones, movements of points of the dam have been attributed to the development of the reactions. The main goal of this master thesis is to model the movements that are detected in concrete dams. The movements captured by auscultation systems, placed on the dams since an adequate number of years, are valuable hints of what happens inside the concrete.