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DSM Formula for Local-Global Interaction Buckling of Cold-Formed Stainless Steel I-Beams

Author

Listed:
  • Yueming Yang

    (School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Shuang Niu

    (School of Ocean Engineering, Harbin Institute of Technology at Weihai, Weihai 264200, China)

  • Xudong Zhi

    (School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China)

Abstract

The paper presents a set of Direct Strength Method (DSM) formulae for cold-formed stainless steel I-section beams. On basis of a carefully calibrated FE model for stainless steel open-section beams featuring local-global interaction buckling, an extensive database was first established. The existing DSM formula of the best prediction performance was commented on for its drawbacks. For improved strength prediction, a traditional-form DSM formula was proposed first, and novel two-phase DSM formulae were derived on basis of a deep insight into the varying trend of the member strengths. The two-phase DSM formulae were found to be very powerful predictors yielding more accurate strength predictions over the whole range of slenderness and avoiding undue conservatism for intermediate and short members. A considerable boost in design strength by up to 39% can be achieved with the two-phase DSM formula. The DSM curves were developed with a due reliability level to fit into the current design codes.

Suggested Citation

  • Yueming Yang & Shuang Niu & Xudong Zhi, 2023. "DSM Formula for Local-Global Interaction Buckling of Cold-Formed Stainless Steel I-Beams," Sustainability, MDPI, vol. 15(2), pages 1-16, January.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:2:p:1333-:d:1031359
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