In this paper, the author introduces the beam - column connections, steel concrete composite beams and floor element in the frame structures, and shows how to determine the stiffness connections of the typical beam - column according to European standards. Survey parameters affecting, including: slab thickness
section area and modul elasticity of reinforcing bars
distance anchor, in order to clarify the influence of the parameters on the stiffness of the connections beam column in composite steel - concrete structures.