| Summary: | Widely reported damage modelling methods inherently use elastic brittle rapidly decaying responses for materials under both uniaxial tension and compression, in spite of the existence of ample experimental evidences that the damaging process under compression is significantly different to that under tension. This paper reports a damage evolution law suitable for representing the gradual damaging under compression. Sensitivity of the parameters of the law has been systematically presented. Internal damaging process of brittle materials has been represented through increase in Poisson’s ratio, thus treating this property as a variable affected by the damage levels. These damage evolution laws have been incorporated into a diffused form of non-local transient-enhanced model and applied to the analysis of masonry through two geometrically different representative volume elements (RVE) with periodic boundary conditions. It has been shown that the geometry of the RVE is insignificant to the prediction of the stress-strain responses of masonry assemblages, thereby supporting adoption of a simple geometry of RVE for predicting the behaviour of bi-material brittle composites.
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