Abstract
Concrete-filled steel tubes (CFST) as composite has been appreciated around the globe due to higher bearing capacity, slender sections, enlarged energy retention, smooth erection and easy construction. The composite action between the hollow tube and the concrete core enhances the compressive strength and ductility. Steel tube local buckling is limited by the infilled concrete. However, these effects are influenced by some of the factors like the column cross-section, section slenderness ratio, class of concrete and thickness of the confining material.Hence it is attempted to study the behavior of concrete packed stub columns with cold formed confinement under axial compression. Relevant high quality journals were collected and reviewed and the data of around 300samples were suitably analyzed during this study. An extensive parametric lookout is carried out to estimate the key-factors including slenderness ratio, shape and thickness of confining material on the axially compressed samples. Moreover the prediction of various available codes are also considered to find their relevance in regards to the peak loading of the specimen. The study concludes good agreement of the prediction by Eurocode-4 as compared to other codes. However in a certain range the prediction of other codes are quite satisfactory.
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