FraMCoS 3 1998 Gifu, Japan

Mode I and Mixed Mode Non-Prescribed Discrete Crack Propagation in Concrete

In this paper the finite element method is used to study non-prescribed crack propagation in concrete. Based on Hillerborg' s discrete approach, cracks are allowed to evolve along interfaces or joints, with initial zero thickness. These interfaces are located along…

First page of: Mode I and Mixed Mode Non-Prescribed Discrete Crack Propagation in Concrete
Year 1998
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Abstract

In this paper the finite element method is used to study non-prescribed crack propagation in concrete. Based on Hillerborg' s discrete approach, cracks are allowed to evolve along interfaces or joints, with initial zero thickness. These interfaces are located along interelement boundaries of the finite element mesh which is kept unchanged during the analysis. Cracks open according to mode I fracture. Two different models are used for crack evolution: i) in the first model no shear stresses are allowed in the fracture zones; ii) in the second one aggregate interlock is taken into account. The results of two numerical examples are presented: a shear beam and a pull- out test. First these examples are analysed with the first model using both randomly generated and regular meshes with the purpose of evaluating the mesh independence of the results. Finally mixed mode fracture is consid- ered for the shear beam test and the corresponding results are compared with the ones obtained from pure mode I analysis.