Concrete Filled Steel Tubes

If the spiral bar in a concrete column is very closely spaced and it is combined with the longitudinal reinforcement and the cover concrete is cancelled the steel tube confined concrete or the concrete filled steel tube is then formed.

Concrete filled steel tubes.

Zhenhai guo in principles of reinforced concrete 2014. Typical cft cross sections 6. Concrete filled steel tubes cft for bridge foundations and substructures. Olympia wa march 23 2010.

9 3 1 mechanical characteristic and mechanism. Concrete filled steel tube cfst structure is a composite structure and consists of a steel tube that is filled up with concrete. There are many advantages of using composite structure as. Introduction concrete filled steel tubes cft uses the advantage of both steel and concrete infill concrete in steel tube delays local buckling steel tube reinforces the concrete to resist tensile forces improves its compression stress and ductility 5.

Performance of concrete filled thin walled steel tubes under pure torsion 1. There exist applications in japan and europe where cfts are also used as bridge piers. Charles roeder dawn lehman. In current international practice cft columns are used in the primary lateral resistance systems of both braced and unbraced building structures.