COMPARATIVE BEHAVIOR OF CONCRETE FILLED STEEL TUBE, SAND FILLED STEEL TUBE, HOLLOW STEEL TUBE AND RCC COLUMN

Abstract

Composite column consisting Concrete-filled steel tubes have become increasingly popular in structural
application around the world composite Concrete-filled steel tubes are economic column type, the majority of axial load type
is resisted by the concrete, which is less expensive than steel. Further, economic can be obtain by using high strength
concrete with thin walled steel tubes using just sufficient steel to supports. the construction load prior to filling with concrete
composite column consisting of Concrete-filled steel tubes of traditional concrete filled column, the problem of concrete
cover spoiling can be avoided, furthermore, inward buckling of the steel is prevented by the steel core , thus increasing the
stability and the strength. if the column as a system. the improved strength of the circular steel tubes filled with concrete is to
the influence of bond strength between the steel tubes and concrete rather than lateral restrain and the strength of circular
steel tubes can be significantly influence by local buckling. The local buckling has been considered by restricted the
allowable diameter to thickness ratio.
For compression member l/d < 50.
The main aim of this study was to increase the knowledge of structural behavior of composite column consisting of circular
hallow steel section filled with concrete and to give practical information of the design purpose.
The main topic of insert were to study how the behavior of column was influenced by
 The bond strength between the steel tubes and the concrete core.
 The increase concrete compressive strength due to confinement of steel.
 Compare of behavior of CFST concrete, sand filled steel tube and hollow steel tube. And
 Analysis of similar load for concrete filled steel tube with respect to RCC short column.
In this thesis, Behavior of concrete filled steel tube is studied that can be used to conservatively estimate the strength of
circular steel tube filled with concrete and reinforced concrete short column under axial loading. The loading positions
examined include axial loading of the steel tubes, steel tube filled with sand and steel tube filled with concrete having
simultaneous loading. Estimation of the economical section out of the tested specimens at same diameter and comparison of
best result concrete filled steel tube with traditional R.C.C column.
In this report stapled practical reports to be done on lab. This reports ends with a set of conclusion and suggestion for future
work