EXPERIMENTAL INVESTIGATION OF CONCRETE-FILLED HIGH STRENGTH STAINLESS STEEL TUBE COLUMNS FOR TALL BUILDING CONSTRUCTION
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Concrete-filled steel tubes have been commonly used in the construction of tall buildings. Stainless steel tubes can be used to provide high corrosion resistance, ease of maintenance and construction as well as aesthetic appearance. This paper presents an experimental investigation of concrete-filled high strength stainless steel tube columns. A series of tests was performed to investigate the effects of the shape of stainless steel tube, plate thickness and concrete strength on the behaviour and strength of concrete-filled cold-formed high strength stainless steel tube columns. The high strength stainless steel tubes were cold-rolled into square and rectangular hollow sections. The concrete-filled high strength stainless steel tube specimens were subjected to uniform axial compression. The column strengths, load-axial strain relationships and failure modes of the columns were presented. The test strengths were compared with the design strengths calculated using the American specifications and Australian/New Zealand standards that consider the effect of local buckling using effective width concept in the calculation of the stainless steel tube column strengths. Based on the test results, design recommendations were proposed for concrete-filled high strength stainless steel tube columns.
