Lattice model for analysing steel-concrete interface behaviour

Publisher Summary This chapter presents the application of a newly developed lattice model to the bond between steel and concrete. In the model, the concrete is modeled as a triangular framework. The heterogeneity of the concrete is implemented by projecting the lattice on top of a generated particle structure, and by assigning different properties to the lattice beams appearing in the various phases of the particle structure. Fracture is simulated by removing in each load-step the beam element with the highest stress over strength ratio. The model is applied to bond of steel to concrete. Three different examples are shown: the effect of ribs on cracking in the bond zone, a detailed analysis of a miniature bond-slip test, and the pull-out of a steel anchor from concrete. All problems are treated as plane stress problems; this implies that longitudinal cracking is omitted. In all the analyses, adhesion between the steel and the concrete is modeled through a very low tensile strength of the beam elements in the lattice.

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