Mixing Steel and Concrete

by Hal Iyengar, Partner; Skidmore, Owings & Merrill, Chicago, Ill.,

Serial Information: Civil Engineering—ASCE, 1985, Vol. 55, Issue 3, Pg. 46-49

Document Type: Feature article


For highrise structures, mixed steel-concrete systems are more efficient and cost less than either material alone. The two design approaches are exterior tube structures and core braced structures. Composite tubular systems combine a reinforced concrete framed tube on the exterior with simple steel framing on the interior. The second type combines a concrete shear wall core with a steel framing for floors and exterior columns. Still in the future are composite superframes in the form of a portal. These exterior frames resist all wind forces, leaving the interior free for atriums. More research is needed for all types of composite design.

Subject Headings: Steel frames | Composite materials | Concrete frames | Steel columns | Shear walls | Materials processing | Steel | Concrete

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