This work focuses on following an existing crack in a pre-stressed concrete structure without describing the early stages of damage. This leads to an estimation of the overall leakage of the structure. A “global model” is proposed that represents most…
This work focuses on following an existing crack in a pre-stressed concrete structure without describing the early stages of damage. This leads to an estimation of the overall leakage of the structure. A “global model” is proposed that represents most phenomena interacting with the behaviour of an existing crack. The model is built from a real cracking pattern. The existing cracks are taken into account through a cohesive zone model; steel reinforcements and pre-stressing tendons are modelled by means of homogenized membrane models; the debonding steel-concrete is represented by another specific cohesive zone model. The constitutive law used for modelling the concrete takes into account basic creep (through a rheological model distinguishing the deviatoric part and the spherical part), shrinkage and drying creep.