Study on the bearing capacity of S600E high-strength stainless steel welded cross-sections

• Published in: Journal of constructional steel research Vol. 175; p. 106386
• Main Authors: Shu, Ganping, Yang, Sen, Jin, Xin, Dong, Shutong, Jiang, Qinglin, Zheng, Baofeng
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2020
• Subjects: Bearing capacity; Local buckling; S600E high-strength stainless steel; Stub column test; Welded cross-sections; Local buckling; Stub column test; Welded cross-sections; Bearing capacity; S600E high-strength stainless steel
• ISSN: 0143-974X; 1873-5983
• DOI: 10.1016/j.jcsr.2020.106386

S600E high-strength stainless steel has outstanding characteristics of high strength, good corrosion resistance and low price. Compared with commonly used stainless steel (e.g. austenitic stainless steel S30408), it has a significant advantage in reducing the cost of material. As a novel structural material, little research has been done on its structural performance. In this study, the local buckling behavior of six box-section and ten I-section S600E high-strength stainless steel welded stub columns were tested under axial compression. Material properties, local geometric imperfections, bearing capacities and typical failure modes of the stub columns were reported. Finite element models were established, and the results were compared with test data to verify its accuracy. Parametric analyses were conducted. The width-thickness ratio limits of stiffened and unstiffened plates were obtained. Formulae of the effective width method were modified to consider the material characteristics of S600E high-strength stainless steel. The predicted strengths using the modified formulae, the American code, the European code, the Chinese specification and the continuous strength method (CSM) were compared with the test results. It indicates that the modified formulae have a better accuracy in predicting the bearing capacity of S600E high-strength stainless steel welded cross-sections. [Display omitted] •A new type of S600E high-strength stainless steel was introduced.•Stub column test in 16 welded S600E sections were conducted.•Modifications were proposed for effective width method to design S600E sections.