Composite beam on ANSYS 1

[PolisStudent]

Hi, Im doing my MSC in structural engineering and im trying to design a composite beam on ANSYS but i haven't manage to achieve a composite action between steel and concrete. Im using shell 43 for the beam,solid 65 for the concrete and combin39 for the shear connectors.I think that the problem is on the shear connectors.I dont know what load deflection curve i have to use.Any suggestions?

 

[loki3000]

maybe one of those two:
INTER204 - 3-D 16-Node Cohesive Zone
INTER205 - 3-D 8-Node Cohesive Zone