BUCKLING AND POST BUCKLING BEHAVIOR OF CONCRETE FILLED RECTANGULAR STEEL TUBULAR STUB COLUMNS UNDER PURE AXIAL COMPRESSION

Abstract

Concrete filled steel tubular column has a large deformation capacity according to the effect of filled concrete preventing the buckling of steel tube wall. However, it has not been clear the mechanism of interaction between steel tube and filled concrete. In this paper, with resnect to the buckling and post-buckling of steel tube, the behavior of concrete filled steel tubular columns under pure axial compression are evaluated on the stub column tests and finite element analysis. Load-displacement curve of concrete filled steel tube are predicted on the basis of analytical results.