FINITE ELEMENT MODELS CAPABLE TO GIVE DETAILED INFORMATION ABOUT CRACKS SPACING AND OPENING IN CONCRETE STRUCTURES IN SERVICE LIFE CONDITIONS

Author(s): Pierre Rossi, Jean-Louis Tailhan
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-171-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 765-776
Total Pages: 12
Language : English

Abstract: IFSTTAR has been developing probabilistic cracking models since 1987. The numerical
model, originally developed to analyze the cracking of concrete, was more recently enhanced
to take into account the presence of rebars and the bond between rebars and concrete and to
model Fibre Reinforced Concretes (FRC). The concrete-rebar bond is represented by interface
elements. Their behaviour is described with a simple deterministic damage model with only
two parameters, cohesion and slip (i.e. relative tangential displacement between steel and
concrete). Concerning FRCs, after the crack creation in the matrix, the acting of the fibres is
taken into account by introducing a dissipated post-cracking energy which is randomly
distributed on the mesh elements as for the matrix tensile strength (at the origin of the cracks
creation). For Concrete, Reinforced Concrete (RC) and FRC Structures, the probabilistic
finite elements models have been fully validated. Their specificity and their originality are
based on the fact that they are capable to bring very precise and accurate information about
cracks spacing and cracks opening when the service limit state of the structures is concerned.
This paper presents some examples of analysis of the cracking process of RC and FRC
structures under service limit state loadings.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00