Mesoscopic scale modeling of concrete under triaxial loading using X-ray tomographic images
Résumé
This paper focuses on the discrete modeling of triaxial behaviour of concrete. The originality of this work comes from two points. The first one concerns the predictive feature of the model developed for simulating the response of concrete specimens; the behaviour of mortar, rock, and their interaction being identified a priori or by means of experimental tests on the mortar and the rock. The second originality relates to the construction method of the discrete element assembly based on the 3D segmentation of tomographic images. Such a method allows modeling of concrete at the mesoscopic scale with an internal structure similar to the one of the concrete tested experimentally. The comparisons between numerical and experimental results show the model is capable to reproduce the triaxial behavior of concrete for confining pressure varying from 0 to 650 MPa.
Mots clés
3D segmentation
Concrete specimens
Confining pressures
Construction method
Discrete elements
Discrete modeling
Experimental test
Internal structure
Mesoscopic modeling
Mesoscopic scale
Tomographic images
Triaxial loading
Triaxial test
Two-point
X-ray tomography
Image segmentation
Mortar
Superconducting materials
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