Analytical behaviour of tapered CFDST stub columns under axially partial compression. (December 2017)

• Record Type: Journal Article
• Authors: Zhang, Yong-Bo; Han, Lin-Hai; Li, Wei
• Is Part Of: Journal of constructional steel research. Volume 139(2017)
• Page Start: 302
• Page End: 314
• Publication Date: 2017-12
• Subjects: Concrete-filled double skin steel tubes (CFDST) -- Tapered column -- Axially partial compression -- Finite element analysis (FEA) -- Full-range analysis -- Ultimate strength; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2017.09.023
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: This paper conducts a numerical investigation on the behaviour of tapered concrete-filled double skin steel tubular (CFDST) stub columns subjected to axially partial compression. A finite element analysis (FEA) model is developed to investigate the partial compressive behaviour of the CFDST column. The full-range load versus deformation relations of tapered CFDST columns under partial and overall compression are both analyzed using the verified FEA model. A parametric study is then conducted to investigate the ultimate strength of the column with various geometric and material parameters. Finally, a simplified model is proposed based on the parametric analysis, which could predict the ultimate strength under partial compression with generally good accuracy. Highlights: A finite element analysis (FEA) model is developed to investigate the partial compressive behaviour of tapered CFDST column. A parametric study is conducted to study the ultimate strength of column with various geometric and material parameters. A simplified model is proposed for the prediction of the ultimate strength of the column with generally good accuracy.