Investigations on Strength of Composite Concrete Filled Steel Columns for Bridges and Other Structures

Abstract

Concrete filled steel box columns have recently experienced a renaissance in their use throughout the world. This has occurred due to the significant advantages that the construction method can provide. This paper deals with the strength behavior of short columns under the axial compression. The Concrete-Filled Steel Tube (CFT) Structural System is a relatively latest system based on filling steel tubes with concrete. The CFT Structural System promises excellent structural characteristics including, strength, deformation capacity and fire resistance for use in various fields of construction. These characteristics result from combining the advantages of steel tubes with those of concrete. The formwork is almost completely eliminated and speed of construction is extremely rapid. Various strength and durability advantages are obtained from this composite structure.