Stratégie de modélisation pour suivre des fissures existantes dans une structure en béton armé précontraint

Abstract : The difficulty of predicting cracks on reinforced concrete structures is due to the heterogeneity of the concrete and the dependence on environmental boundary conditions. To overcome this problem, we introduce directly a potential crack at the initial time, using cohesive zone models. A major difficulty will be to juggle the cohesive zone models describing cracking and the phenomena of creep and drying, and thus to consider three types of nonlinearities appearing in the calculation : cracking, decohesion of steelconcrete and creep. We also propose a strategy to represent an initially cracked structure. In this thesis, the crack behavior in different parts of the confinement building are modeled using the above described method.
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Eric Lefebvre. Stratégie de modélisation pour suivre des fissures existantes dans une structure en béton armé précontraint. Matériaux. PSL Research University, 2016. Français. ⟨NNT : 2016PSLEM069⟩. ⟨tel-01709740⟩

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