In this paper, we propose an original and alternative FEM strategy to simulate the expansion and damage in cross sections of concrete elements due to non-uniform corrosion associated with chloride ingress. The strategy embed two-dimensional particle elements in two-dimensional matrix elements to simulate the stress distribution in the steel/concrete interface. This approach is different from the usual ones in which the steel rebar is replaced by forces and the contribution of the reinforcement stiffness is neglected. The reinforced concrete cross section is made by the composition of matrix and particle elements by means of nodal correspondence. This ensures that the number of degrees of freedom is not affected by the reinforcement, which makes the technique highly economical from the numerical point of view. A damage model contributes to the process of concrete degradation due to corrosion. The numerical applications ensure the accuracy of the developed model, showing its applicability in the analysis of non-uniform corrosion propagation in cross sections of reinforced concrete structures.

在本文中，我们提出了一种原始的和可替代的有限元策略，以模拟由于与氯化物进入相关的不均匀腐蚀而引起的混凝土构件横截面的膨胀和破坏。该策略将二维粒子元素嵌入到二维矩阵元素中，以模拟钢/混凝土界面中的应力分布。这种方法与通常的方法不同，在常规方法中，用力代替了钢筋，而忽略了增强刚度的作用。钢筋混凝土横截面由节点和基体组成，由基体和颗粒元素组成。这确保了自由度的数量不受加固的影响，这使得该技术从数值的角度来看非常经济。损伤模型有助于混凝土由于腐蚀而退化。数值应用确保了开发模型的准确性，显示了其在分析钢筋混凝土结构横截面中非均匀腐蚀传播方面的适用性。