3D mesoscale analysis of the effects of steel bar ribs geometry on reinforced concrete bond strength - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Finite Elements in Analysis and Design Année : 2023

3D mesoscale analysis of the effects of steel bar ribs geometry on reinforced concrete bond strength

Résumé

Mechanical or geometrical interlock between steel bars and concrete directly affects the bond strength in reinforced concrete structures. This aspect is usually neglected, or at least indirectly considered, when modelling and simulating reinforced concrete structures using macroscopic models, due to the difficulty and complexity it adds to such structural simulations on large structures. However, modelling of the steel-concrete bond at the mesoscale is capable of showing the effect of varying the geometry of the ribs. In this contribution, the effect of the geometry of the ribs at the mesoscale is numerically modelled in 3D. Mazars’ damage model is assigned for concrete and a frictional cohesive zone model is used for the steel-concrete interface. Pull-out test simulations are performed on steel bars having rectangular ribs and compared to experimental results to prove the ability of the models to reproduce the overall behavior. Samples having only one rib are then considered in order to understand the general effect of varying each rib dimension at a time. A simulation is performed on a bar having a herringbone shape and the corresponding results are compared to those of a spiral bar. Using the simulated results, a simple function is proposed to predict the variation in the mean bond stress with the geometry of the ribs shape. It depends on two main geometrical parameters, which are detailed in the contribution. It is verified using experimental and numerical data to show its efficiency to reproduce macroscopic quantities.
Fichier non déposé

Dates et versions

hal-04010294 , version 1 (01-03-2023)

Identifiants

Citer

Mohammad Abbas, Benoît Bary, Ludovic Jason. 3D mesoscale analysis of the effects of steel bar ribs geometry on reinforced concrete bond strength. Finite Elements in Analysis and Design, 2023, 219, pp.103928. ⟨10.1016/j.finel.2023.103928⟩. ⟨hal-04010294⟩
21 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More