Confinement effects on the steel–concrete bond strength and pull-out failure

Anaëlle Torre-Casanova (1) , Ludovic Jason (2, 3) , Luc Davenne (4) , Xavier Pinelli (5)

1 LMT - Laboratoire de Mécanique et Technologie
2 IMSIA - UMR 9219 - Institut des Sciences de la mécanique et Applications industrielles
3 LM2S - Laboratoire de Mécanique Systèmes et Simulation
4 LEME - Laboratoire Energétique Mécanique Electromagnétisme
5 LMT - Laboratoire de Mécanique et Technologie

In this contribution, an experimental campaign based on unconfined and actively confined pull-out tests is presented to investigate the bond stress-slip behavior. This campaign aims at underlining passive (concrete cover) and active (external pressure) confinement effects on the maximal bond stress. Experimental results are associated to a numerical approach in order to predict the evolution of the bond strength. Equations are finally proposed that distinguish splitting failure (function of the concrete tensile properties) and pull-out failure (function of the compressive concrete properties).

Mots clés: Steel–concrete bond; Pullout; Failure; Confinement; pullout; steel-concrete bond; failure; confinement

Domaines: Mécanique des structures [physics.class-ph]

Anaëlle Torre-Casanova, Ludovic Jason, Luc Davenne, Xavier Pinelli. Confinement effects on the steel–concrete bond strength and pull-out failure. Engineering Fracture Mechanics, 2013, 97, pp.92--104. ⟨10.1016/j.engfracmech.2012.10.013⟩. ⟨hal-01411076⟩