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Composite modelling of masonry deformation

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Abstract

Based on the measured properties of individual bricks, blocks and mortar specimens, composite model expressions are presented for elasticity, creep and moisture movement of masonry in two directions. The model demonstrates the influence of creep in horizontal moisture movement, and allows for anisotropy of brick or block. Simulation of the role of moisture diffusion in masonry is a requirement for statisfactory predictions by the model, this being achieved by testing specimens having the same volume/exposed surface area ratio as the masonry component phases. Experimental verification is shown for clay brickwork walls and piers, and for calcium silicate walls.

Résumé

On exprime des valeurs d’élasticité, de fluage et de mouvement d’humidité dans deux directions au moyen d’un modèle composite de maçonnerie réalisé d’après les propriétés mesurées de briques individuelles, de blocs et d’échantillons de mortier. Le modèle démontre l’influence du fluage sur les mouvements horizontaux d’humidité, et tient compte de l’anisotropie de la brique ou du bloc.

Comme le modèle ne peut donner de résultats satisfaisants que s’il inclut une simulation du rôle de la diffusion d’eau dans la maçonnerie, on effectue des essais sur des spécimens qui présentent le même rapport volume/surface exposée que les phases en présence dans la maçonnerie. On procède à une vérification expérimentale pour des murs et jetées en briques et pour des parois en briques silico-calcaires.

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  1. Department of Civil Engineering, University of Leeds, SL2 9JT, Leeds, UK

    J. J. Brooks

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Brooks, J.J. Composite modelling of masonry deformation. Materials and Structures 23, 241–251 (1990). https://doi.org/10.1007/BF02472197

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