An experimental investigation of cold-formed lean duplex stainless steel members in combined compression and minor axis bending is performed. The test specimens were cold-rolled from flat strips of lean duplex stainless steel grade EN 1.4162 into two rectangular hollow sections. Different eccentricities were applied to the rectangular hollow sections, so that a beam-column interaction curve for each series of test can be obtained. Initial overall geometric imperfections of the members were measured prior to testing. The ultimate loads and the failure modes of each specimen were obtained. Failure modes include flexural buckling as well as interaction of local and flexural buckling were observed from the test specimens. The test strengths were compared with the design strengths predicted by the American, Australian/New Zealand and European specifications for stainless steel structures. It should be noted that these specifications do not cover the material of lean duplex stainless steel. Generally, the specifications are capable of predicting the beam-column strengths of the lean duplex stainless steel test specimens.
展开▼
