Masonry is a composite material composed of individual units laid in and boundtogether by mortar. Appropriate Understanding of masonry material properties results in secure andefficient protection and strengthening of historical structures. Due to high computation costs anddifficulties deal with detailed modelling of masonry structures, few studies are available in openliterature dedicated to micro numerical modelling of masonry structures subjected to blast loading. Inpresent study, the objective is to propose a dynamic interface model obeying non-associated flow rulewith high strain rate effects to apply as material model for interface elements. In order to introduce thestrain rate effects of brick and mortar properties, a recent developed model is applied here. Verifyingthe capability of the model proposed, numerical simulations are carried out to investigate thebehaviour of unreinforced brick masonry walls subjected to explosive blast loading by using the finiteelement (FE) code ABAQUS. The results obtained are compared with field test data to find goodagreement. A comprehensive parametric analysis is finally accomplished with different main materialproperties to evaluate the effect of each parameter on high strain rate response of masonry walls.
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