Meso-scale modelling of the size effect on the fracture process zone of concrete

Grassl, P. , Grégoire, D., Rojas Solano, L. and Pijaudier-Cabot, G. (2012) Meso-scale modelling of the size effect on the fracture process zone of concrete. International Journal of Solids and Structures, 49(13), pp. 1818-1827. (doi: 10.1016/j.ijsolstr.2012.03.023)

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The size effect on the fracture process zone in notched and unnotched three point bending tests of concrete beams is analysed by a meso-scale approach. Concrete is modelled at the meso-scale as stiff aggregates embedded in a soft matrix separated by weak interfaces. The mechanical response of the three phases is modelled by a discrete lattice approach. The model parameters were chosen so that the global model response in the form of load-crack mouth opening displacement curves were in agreement with experimental results reported in the literature. The fracture process zone of concrete is determined numerically by evaluating the average of spatial distribution of dissipated energy densities of random meso-scale analyses. The influence of size and boundary conditions on the fracture process zone in concrete is investigated by comparing the results for beams of different sizes and boundary conditions.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Grassl, Dr Peter
Authors: Grassl, P., Grégoire, D., Rojas Solano, L., and Pijaudier-Cabot, G.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:International Journal of Solids and Structures
ISSN (Online):1879-2146
Published Online:04 April 2012

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