Experimental and numerical analysis pull-out strength of steel strip in foam concrete

Abstract

The structural performance of a reinforced concrete is influenced by the properties of the reinforcing element and the concrete interface. Therefore, investigating the pull-out strength and bond stress vs. slip relationship between components of the reinforced concrete are very important. This paper presents a numerical method to study the pull-out behaviour of galvanised steel strips in aerated concrete. A local bond-slip relationship is determined using experimental and theoretical analyses and is then implemented to the finite element simulation through the user-defined subroutine of ABAQUS software. The effect of strip geometry and mechanical properties of the aerated concrete on the pull-out force is also investigated. Comparison between the experimental, theoretical and FE simulation results shows very good agreement. It was shown that a trilinear bond-slip model is suitable for the modelling of steel strip and concrete interface.

Keywords:

• foam concrete
• bond stress vs. slip relationship
• pull-out test
• steel strip