This paper presents experimental and finite element results of investigations into the stiffness and strength of
three discrete interface connections between simple steel frames and precast concrete infill panels serving as lateral
bracing. The ability of the connections to resist compression and tension allows them to introduce substantial lateral stiffness
and strength into so called semi-integral infilled frames.
The discrete connection between a steel frame and a concrete panel consists of two parts: a steel anchor plate welded to
multiple anchor bars which are cast in the concrete panel and a gusset plate welded to the frame. For a complete framepanel
connection the anchor plate is bolted to the gusset plate thereby allowing composite action of the steel-concrete
structure. The bolts in the connection are loaded in shear only.
The connections were employed in full-scale experiments on one-storey, one-bay, hybrid infilled frame structures. Finite
element analyses were performed for comparison showing that simulation of the behaviour of the hybrid lateral load resisting
structure is possible. The validated finite element models can be used for parametric studies with the goal of developing
analytical models as a basis for design rules.