Mesoscopic scale modeling of concrete under triaxial loading using X-ray tomographic images

C. Poinard (1, 2) , E. Piotrowska (1, 2) , Philippe Maurice Marin (1, 2) , Y. Malecot (1, 2) , L. Daudeville (1, 2)

1 3SR - Laboratoire sols, solides, structures - risques [Grenoble]
2 RV - Risques, Vulnérabilité des structures et comportement mécanique des matériaux

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; Loading

Domaines: Mécanique [physics.med-ph]

C. Poinard, E. Piotrowska, Philippe Maurice Marin, Y. Malecot, L. Daudeville. Mesoscopic scale modeling of concrete under triaxial loading using X-ray tomographic images. Particle Based Methods Conference, 2011, Barcelona, Spain. pp.117-129. ⟨hal-01998302⟩