Macro-modelling of orthotropic damage in masonry: combining micro-mechanics and continuum FE analysis
10.1016/j.engfailanal.2022.106704
Inclou dades d'ús des de 2022
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hdl:2117/383743
Tipus de documentArticle
Data publicació2022-11
EditorElsevier
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Abstract
Due to the complex interaction of its constituent materials, arising from their brittleness and staggered geometric arrangement,
masonry as a composite material is often characterised by pronounced orthotropy, both in elasticity and strength [20]. This orthotropy
is particularly important in the study of earthquake induced damage and collapse mechanisms of large masonry structural elements
[23]. Accurate prediction of the force capacity of masonry elements, therefore, relies not only on the careful mechanical character-
isation of its comprising materials, but also on modelling their interaction at the material scale [32].
Finite element (FE) analysis of masonry structures can assume different levels of detail for the representation of the mechanical
features and potential failure modes of the material. For example, in a macro-modelling approach the material may be treated as an
isotropic [7] or orthotropic [26] continuum. The large number of material parameters in need of characterisation for the execution of
these simulations has led to the development of experimental frameworks [12], empirical approaches [11] and numerically-driven
calibration methods [16] for determining these parameters. While both approaches have been successfully used for nonlinear anal-
ysis [8,21,28], it is the latter that provides a truer representation of the mechanical properties of masonry. Continuum modelling can
be very attractive due to the geometrical simplicity of the resulting models and the reduced computational costs, especially for
modelling large structures. However, orthotropic models must still rely on complex experiments, well-founded assumptions or
ancillary computations for actually determining the orthotropic properties of the continuum.
Stemming from the inherent attractiveness of continuum modelling and the need for deriving macroscopic orthotropy from ma-
terials that are themselves often isotropic, constitutive approaches have been developed for taking into account the interaction of
potential failure modes in regularly bonded masonry through a phenomenological or analytical rather than a detailed micro-
mechanical approach [27,29]. While very promising, this approach does not directly provide comprehensive information on the
stresses and strains in the material components comprising the masonry composite.
CitacióDrougkas, A. Macro-modelling of orthotropic damage in masonry: combining micro-mechanics and continuum FE analysis. "Engineering failure analysis", Novembre 2022, vol. 141, núm. 106704.
ISSN1350-6307
Versió de l'editorhttps://www.sciencedirect.com/science/article/pii/S1350630722006719
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