A nonlinear finite element model (FEM) is developed to assess the behaviour of a cracked concrete interface, reinforced with embedded steel bars and subjected to monotonic loading. A dowel action finite element modelling approach is conceived for that purpose. The bond between the steel bars and the surrounding concrete is also considered in the model and an interface finite element is included to simulate aggregate interlock. Then, the comparison of the model results with experimental values allowed the calibration of aggregate interlock constitutive relations for cracks in monolithic concrete restrained by embedded steel bars. New constitutive relations are also proposed for shear transfer by aggregate interlock in a concrete joint.

中文翻译：

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预埋钢筋混凝土界面有限元分析中骨料互锁的本构模型

开发了一个非线性有限元模型 (FEM) 来评估开裂混凝土界面的行为，用嵌入式钢筋加固并承受单调载荷。为此目的构想了木榫作用有限元建模方法。模型中还考虑了钢筋与周围混凝土之间的粘结，并包括一个界面有限元来模拟骨料互锁。然后，将模型结果与实验值进行比较，可以校准预埋钢筋约束的整体混凝土中裂缝的骨料互锁本构关系。还提出了新的本构关系，用于通过混凝土接缝中的骨料互锁进行剪切传递。