Concrete Filled Steel Tubular Columns

They are composed of an outer steel tube with an inner h section steel member and concrete and are classified into concrete filled circular steel tubes with embedded internal h section steel h cfcsts and concrete filled rectangular steel tubes with embedded internal h section steel h cfrsts.

Concrete filled steel tubular columns.

Concrete filled steel tubular column comprising a hollow steel tube infilled with concrete has been used widely in high rise buildings. The cft columns can provide high capacity favorable ductility and large energy absorption capacity compared with the reinforced concrete structures. Concrete filled steel tubular cfst columns are adopted in many structural applications especially for tall buildings bridges and large infrastructure due to their substantial structural and economic benefits. Concrete filled steel tube cfst columns with internal h section steel h cfst are a new type of structural component.

However the design guidelines for cfst columns with high strength materials and slender sections are still limited. Concrete filled steel tubular cfts columns subjected to eccentric compressive load aip conference proceedings 2060 020004 2019. Concrete filled steel tubular cft columns have been used in many engineering structures such as bridges high rise buildings residential structures and other industrial structures.