| Affiliation: | 1.E.T.S. Ing. de Caminos, Canales y Puertos de Barcelona,Universitat Politècnica de Catalunya,Barcelona,Spain;2.Department of Civil Engineering,Indian Institute of Technology Madras,Chennai,India;3.Department of Geotechnical Engineering, School of Civil Engineering (E.T.S. Ing. de Caminos, Canales y Puertos de Barcelona,Universitat Politècnica de Catalunya,Barcelona,Spain |
| Abstract: | The paper presents a model, based on nonlinear fracture mechanics, for analysing crack propagation in quasi-brittle materials, such as concrete. The work is limited to two-dimensions, and therefore, the fracture modes of interest are mode I (pure tension) and mode II (pure shear). The constitutive model has been implemented in the context of the finite element method using interface elements. The fracture is simulated through a discrete crack represented by the interface with a cohesive crack stress-separation relation derived from the model, which is based on a fracture criterion, together with a flow rule and a softening law. The model is used for simulating results from an experimental study on beams with centric and eccentric notches of high and normal strength concretes, and explaining other test results available in the literature. |
