A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modélisation des anisotropies mécaniques induites par la fissuration du béton
Concrete cracking is modeled in the general framework of anisotropic damage theory with anelastics strains. The use of anisotropic criteria allows to describe both direct and induced tension cracks that appear at the aggregate—cement paste interfaces; thus damage is represented by two second order tensors for direct and induced tension, respectively, which define the marginal damages. A possible rotation of the cracks is obtained by formulating the criteria flow in the principal axes of effective stresses. Mechanical damage approximation is deduced from marginal damages by using the weakest link theory extended to the cases of non proportional loading. This method, which makes it possible to couple several non coaxial damage tensors, is presented in this paper in a restrained framework including only mechanical cracking causes; nevertheless it can be generalized without difficulties to other cracking causes (chemical damage for example). In finite element context, objectivity of the post peak tensile behavior is ensured thanks to an anisotropic Hillerborgh procedure. The efficiency and relevancy of the model are analyzed through the results of numerical simulations of various structures; these results are compared to experimental data when available.
Modélisation des anisotropies mécaniques induites par la fissuration du béton
Concrete cracking is modeled in the general framework of anisotropic damage theory with anelastics strains. The use of anisotropic criteria allows to describe both direct and induced tension cracks that appear at the aggregate—cement paste interfaces; thus damage is represented by two second order tensors for direct and induced tension, respectively, which define the marginal damages. A possible rotation of the cracks is obtained by formulating the criteria flow in the principal axes of effective stresses. Mechanical damage approximation is deduced from marginal damages by using the weakest link theory extended to the cases of non proportional loading. This method, which makes it possible to couple several non coaxial damage tensors, is presented in this paper in a restrained framework including only mechanical cracking causes; nevertheless it can be generalized without difficulties to other cracking causes (chemical damage for example). In finite element context, objectivity of the post peak tensile behavior is ensured thanks to an anisotropic Hillerborgh procedure. The efficiency and relevancy of the model are analyzed through the results of numerical simulations of various structures; these results are compared to experimental data when available.
Modélisation des anisotropies mécaniques induites par la fissuration du béton
Sellier, Alain (author) / Bary, Benoît (author)
Revue Française de Génie Civil ; 5 ; 1197-1224
2001-12-01
28 pages
Article (Journal)
Electronic Resource
Unknown
Fissuration des structures en béton précontraint: Modélisation, validation et interprétation
| Online Contents | 1999
Fissuration des structures en béton précontraint: Modélisation, validation et interprétation
| Springer Verlag | 1999
Fissuration et durabilité du béton
| Taylor & Francis Verlag | 1998
| Engineering Index Backfile | 1939
Etude numerique et experimentale des deformations mecaniques induites par le soudage
| British Library Online Contents | 2014