Abstract
This article is devoted to the modelling of interdependent mechanical and hydraulic behaviours of geomaterials in presence of a single through-wall fracture by means of micromechanics arguments. Experimental results of fractured concrete samples show non-linear evolutions for both mechanical and hydraulic behaviours with respect to confinement intensity. These non-linear responses are interpreted by the progressive closure of crack-like pores defining the pore volume of the fracture interfacial domain. Disregarding tortuosity effects, we adopt a 2D representation for these cracks. The key role of the fracture initial porosity is also emphasized. It allows to discuss the shape of the distribution of the local apertures distribution function classically used, intercepted here in terms of the distribution of initial crack–aspect ratio within the fracture domain. Application on fractured concrete samples shows the capability of the theoretical model to accurately reproduce the experimental results.
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