Buckling of piecewise member composed of steel and high-strength materials in axial compression. (January 2017)

• Record Type: Journal Article
• Authors: Feng, Peng; Zhang, Yanhua; Hu, Lili; Gong, Da
• Is Part Of: Thin-walled structures. Volume 110(2017)
• Page Start: 62
• Page End: 74
• Publication Date: 2017-01
• Subjects: Stability bearing capacity -- Theoretical analysis -- Buckling -- Fiber reinforced polymer -- Steel strengthening -- Buckling restrained brace; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2016.10.008
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: The elastic buckling load of an axially compressed piecewise member was derived under various ideal boundary conditions based on the differential element method; then, the result was simplified for a symmetrical member. The theoretical results were found to be consistent with existing formulas for the elastic buckling load of uniform members. Then, the elasto-plastic buckling of an axially compressed piecewise member composed of steel and elastic materials was investigated and found to be quite different from that of a pure steel member, and a theoretical analysis approach was developed. In elasto-plastic buckling analysis, the load-bearing capacity of the steel section in the ultimate state is determined considering initial imperfections and steel hardening. Furthermore, the symmetric method for obtaining the load-bearing capacity of this member was obtained based on the ultimate state of the critical section, which is simple and reparative for design. The theoretical results of the elasto-plastic buckling analysis were consistent with experimental results, therein obtaining an average error of 4%. Highlights: Buckling load of axially compressed piecewise member is derived. A theoretical analysis approach for elasto-plastic hybrid member is established. Initial imperfections, steel hardening and interface properties are considered.