Model coupling friction and adhesion for steel-concrete interfaces

TL;DR

This paper presents a numerical model combining adhesion and friction to simulate steel-concrete interface behavior, validated through pull-out experiments, enhancing understanding of slip and damage mechanisms.

Contribution

The study extends the RCCM interface model by incorporating a variable friction coefficient to better simulate slip weakening during steel-concrete interactions.

Findings

Model accurately predicts slip weakening behavior.

Validated with experimental pull-out tests.

Provides a comprehensive tool for interface analysis.

Abstract

The interface behaviour between steel and concrete, during pull-out tests, is numerically investigated using an interface model coupling adhesion and Coulomb friction. This model, first developed by Raous, Cang\'emi, Cocou and Monerie (RCCM), is based on the adhesion intensity variable, introduced by Fr\'emond, which is a surface damage variable. The RCCM model is here completed by taking a variable friction coefficient to simulate the slip weakening of the interface when sliding occurs. Identification of the parameters and validation of the model are carried on pull out experiments conducted at the INSA of Toulouse on steel-concrete interface of reinforced concrete.