Numerical modeling of the rebar/concrete interface: case of the flat steel rebars

Phan, Thanh Song; Tailhan, Jean‐Louis; Rossi, Pierre; Bressolette, Philippe; Mezghani, Fares

doi:10.1617/s11527-012-9950-y

Cited by 10 publications

(16 citation statements)

References 11 publications

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“…As this bond model was presented in detail in a previous paper [4], only a general presentation is given here. In the numerical model (FEM), the bond zone between the concrete and the rebar is represented by interface elements that connect the concrete to the rebar.…”

Section: Concrete/rebar Bond Modelmentioning

confidence: 99%

“…As the presentation of the tie beam test and the inverse approach used have been described in detail in a previous paper [4], only a general, brief description of the tie beam test is given here, indicating the values of the bond law parameters obtained within the scope of this inverse approach. Remarks 1.…”

Section: Concrete/rebar Bond Modelmentioning

confidence: 99%

“…In order to compare numerical simulations with experiments, nine calculations per configuration (per pair C, δ tcri ) were performed using the Monte-Carlo method (each simulation corresponding to one random distribution of the mechanical properties in the concrete) [4]. Material characteristics used in the numerical simulation are presented in table 2 (related to the experimental results).…”

Section: Parametric Study -Determining the Parameter Values Of The Bomentioning

confidence: 99%

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3D numerical modelling of concrete structural element reinforced with ribbed flat steel rebars

Phan¹,

Tailhan²,

Rossi³

2013

Structural Concrete

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IntroductionConstruction company MATIERE has developed a new type of reinforcement based on ribbed flat steel in recent years. To verify that the use of this new reinforcement satisfies the relevant Eurocodes, a major experimental study was carried out by the Polytech Clermont-Ferrand Laboratory. The objective is to obtain information concerning, on the one hand, the bending behaviour of RC structural elements reinforced with these flat steel bars and, on the other, the cracking process they induce (number of cracks and crack opening), especially at the serviceability limit state.The structural element chosen in the scope of this work is a small slab-beam (330 × 15 × 80 cm) subjected to three-point central bending.Concurrent with this experimental study, a numerical finite element model was developed at IFSTTAR to consolidate the experimental results. This numerical modelling takes into account: -Cracking of concrete through a probabilistic discrete cracking model -Concrete/steel bond through an interface element exhibiting damage behaviour -Elasto-plastic behaviour of steel (Von Mises law)

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Section: Concrete/rebar Bond Modelmentioning

confidence: 99%

Section: Concrete/rebar Bond Modelmentioning

confidence: 99%

Section: Parametric Study -Determining the Parameter Values Of The Bomentioning

confidence: 99%

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3D numerical modelling of concrete structural element reinforced with ribbed flat steel rebars

Phan¹,

Tailhan²,

Rossi³

2013

Structural Concrete

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“…Two modeling strategies were introduced to model the concrete–rebar bond: The concrete–rebar bond is represented by interface elements. Their behavior is described with a simple deterministic damage model with only two parameters, cohesion and slip (i.e., relative tangential displacement between steel and concrete). The notches/indentations are explicitly modeled along the whole length of the rebar with a perfect bond between concrete and rebar. …”

Section: Introductionmentioning

confidence: 99%

Numerical strategy for developing a probabilistic model for elements of reinforced concrete

Nader¹,

Rossi²,

Tailhan³

2017

Structural Concrete

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This paper introduces a new approach to model cracking processes in large reinforced concrete structures, like dams or nuclear power plants. For these types of structures it is unreasonable, due to calculation time, to explicitly model rebars and steel-concrete bonds. To solve this problem, we developed, in the framework of the finite element method, a probabilistic macroscopic cracking model based on a multiscale simulation strategy: the probabilistic model for (finite) elements of reinforced concrete (PMERC). The PMERC's identification strategy is case-specific because it holds information about the local behavior, obtained in advance via numerical experimentations. This information is then projected to the macroscopic finite element scale via inverse analysis. The numerical experimentations are performed using a validated cracking model allowing a fine description of the cracking processes. The method used in the inverse analysis is inspired from regression (supervised learning) algorithms: data on the local scale-the training data coupled with working knowledge of the mechanical problem-would shape the macroscopic model. Although the identification phase can be relatively time-consuming, the structural simulation is as a result, very fast, leading to a sensitive reduction of the overall computational time. It is proposed a first validation of this multiscale modeling strategy on a reinforced concrete slab-beam subjected to three-point bending. We achieved promising results in terms of global behavior and macrocracking (mainly crack openings), and an important reduction in calculation time-up to 99% reduction! So we believe this is a promising approach to solve bigger and more complex structures in shorter time.

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“…technique is numerically convenient, but has difficulties in capturing the progressive loss of bond stiffness during loading. We can also cite other interesting studies: (i) one is based on internal forces and kinematic relations between a truss-element rebar and plain concrete [16], (ii) an other one extends an explicit cracking model for concrete to the bond behavior, taking into account the progressive degradation in shear [17], (iii) embedded or extended finite element methods are also used on joints elements [18].…”

Section: Introductionmentioning

confidence: 99%

Reinforcement–concrete bond behavior: Experimentation in drying conditions and meso-scale modeling

Michou

Hilaire

Benboudjema

et al. 2015

Engineering Structures

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Numerical modeling of the rebar/concrete interface: case of the flat steel rebars

Cited by 10 publications

References 11 publications

3D numerical modelling of concrete structural element reinforced with ribbed flat steel rebars

3D numerical modelling of concrete structural element reinforced with ribbed flat steel rebars

Numerical strategy for developing a probabilistic model for elements of reinforced concrete

Reinforcement–concrete bond behavior: Experimentation in drying conditions and meso-scale modeling

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