Composite structures with abaqus

Madam,

I want to make a simple composite structures of concrete embedded steel in abaqus. (If I am wrong kindly say) I have creted a "dependent" instances in the assemble module after doing the mesh. Then I have made the interaction with the step-1 and made a "surface to surface contect (standard)" having the master (concrete) and slave (steel) with contact (friction) property.