In this paper, a FE homogenized limit analysis model suitable to analyze masonry structures near collapse is applied to a real large scale 3D masonry building subjected to horizontal actions. In the model, masonry is substituted through a fictitious macroscopic homogeneous material. Masonry macroscopic mechanical properties are obtained by means of a recently presented equilibrated limit analysis approach performed on a suitable unit cell, which generates the entire structure by repetition. Masonry homogenised failure surfaces are then implemented in the 3D code here outlined. With respect to previously presented models, the software allows to analyze real scale buildings, without the classic uncoupling of in-plane and out-of-plane actions. The possible presence of steel, RC and ring beams is also considered introducing in the numerical model two-node beam elements. A relevant 3D structural example consisting of a masonry school subjected to horizontal actions is treated. Full sensitivity analyses and a comparison with results obtained with a commercial elasto-plastic software are also presented to validate the results provided by the model proposed.

FE homogenized limit analysis code for masonry buildings

MILANI, GABRIELE;
2011-01-01

Abstract

In this paper, a FE homogenized limit analysis model suitable to analyze masonry structures near collapse is applied to a real large scale 3D masonry building subjected to horizontal actions. In the model, masonry is substituted through a fictitious macroscopic homogeneous material. Masonry macroscopic mechanical properties are obtained by means of a recently presented equilibrated limit analysis approach performed on a suitable unit cell, which generates the entire structure by repetition. Masonry homogenised failure surfaces are then implemented in the 3D code here outlined. With respect to previously presented models, the software allows to analyze real scale buildings, without the classic uncoupling of in-plane and out-of-plane actions. The possible presence of steel, RC and ring beams is also considered introducing in the numerical model two-node beam elements. A relevant 3D structural example consisting of a masonry school subjected to horizontal actions is treated. Full sensitivity analyses and a comparison with results obtained with a commercial elasto-plastic software are also presented to validate the results provided by the model proposed.
2011
Brickwork & masonry; Mathematical modelling; Homogenisation techniques
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/560664
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