Evaluation of the pull-out strength of galvanised steel strips in a cement-based material

摘要

The study of the interfacial and bond behaviour of reinforced cement-based materials is important for understanding the mechanical behaviour of such composites.This paper presents extensive experimental,theoretical and finite element analyses of pull-out tests of galvanised steel strips with different geometries,in lightweight cement-based material blocks with different densities and mechanical properties.The theoretical model proposed here is capable of determining the pull-out strength and bond stress versus the slip relationship between components of reinforced cement-based materials.This bond-slip relationship is then implemented in finite element simulation through the user-defined subroutine of ABAQUS software.Based on the results,a trilinear bond-slip model is suitable for modelling the interface between a steel strip and a cement-based material interface.