International Symposium on Advances in Earthquake &
Structural Engineering, October24-26, 2007
Sleyman Demirel University, Isparta-Antalya, Turkey
Cost Comparison of Elastic and Plastic Design of a Steel
Structure with a Concrete Structure
M. Metin Kose, Ismail Sirikci K. Sutcu Imam University,
Department of Civil Engineering, Kahramanmaras,
Turkey
Abstract Although Turkey is located on earthquake region, most
of the residential structures are made by concrete and prejudice to
steel construction still continues. Cost and time comparisons of
the steel and concrete structure are still made by investors but
very limited works on the cost reduction on steel structures are
available. In this study, concrete and steel structures with the
same floor planes were designed and cost of the structures were
compared with each other. Concrete structure was designed by using
STA4CAD software. Design of steel structure was performed using
elastic and plastic design method. Elastic design of steel
structure was performed by using SAP2000 software. In plastic
design process, rigid plastic hinge method was used. A separate
computer program was written for plastic design of steel structure
to run with SAP2000. Member-end forces determined by SAP2000 and
then entered to the computer code to find the location of plastic
hinges. Model in SAP2000 was then modified by entering the plastic
hinges and then rerun. This cycle was continued until model becomes
unstable. Once design process of reinforced concrete and steel
structures was completed, cost comparison of these three structures
was performed. It was found that plastic design procedure reduced
total cost of the structure up to 16% for the selected floor plan.
Although cost of steel structure is higher than concrete structure,
completion time of steel construction is about one third of
completion time of concrete structures.
Keywords: Steel, Concrete, Structures, Plastic design, Elastic
design, Cost comparison
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