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Integrated modelling of corrosion-induced deterioration in rein-forced concrete structures

机译:加固混凝土结构中腐蚀引起的恶化的综合模拟

摘要

An integrated finite element based modelling approach is presented, which allows for fully coupled simulation of reinforcement corrosion and corrosion-induced concrete damage. While a finite element method (FEM) based corrosion model was used to describe electrochemical processes at the reinforcement surface, a FEM based me-chanical model was used to simulate corrosion-induced concrete damage. Both FEM models were fully coupled, i.e. information, such as corrosion current density, dam-age state of concrete cover, etc., were constantly exchanged between the models.To demonstrate the potential use of the modelling approach, a numerical example is presented which illustrates full coupling of formation of corrosion cells, propagation of corrosion, and subsequent development of corrosion-induced concrete damage.
机译:提出了一种基于有限元的集成建模方法,该方法可以对钢筋腐蚀和腐蚀引起的混凝土损伤进行完全耦合的模拟。虽然使用基于有限元方法(FEM)的腐蚀模型来描述钢筋表面的电化学过程,但是使用基于FEM的机械模型来模拟腐蚀引起的混凝土损伤。这两个FEM模型是完全耦合的,即在模型之间不断交换诸如腐蚀电流密度,混凝土覆盖层的破坏状态等信息。为了说明该建模方法的潜在用途,给出了一个数值示例,其中说明了腐蚀单元的形成,腐蚀的传播以及腐蚀引起的混凝土损伤的后续发展的完全耦合。

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