ABSTRACT
Bond between concrete and reinforcing bars is one of the main aspects of behaviour of both reinforced and prestressed concrete structures.
In the former case, both at the serviceability and at the ultimate state, the transfer of stresses between the two materials is strongly dependent on the quality of bond. In fact, resisting mechanisms under bending, shear and torsion are related to the development of an adequate bond; moreover, many serviceability verifications, such as the control of cracks amplitude and structure deformations, involve the evaluation of the effects of the tension-stiffening which is a phenomenon directly arising from the bond between the two materials.
