Compressive strength capacity of light gauge steel composite columns

Case Studies in Construction Materials

Muslim Majeed¹  W. Leonardo Cortés-Puentes¹  Alaa Abdulridha¹  Dan Palermo² 

[1] Department of Civil Engineering, University of Ottawa, 161 Louis Pasteur St., Ottawa ON K1N 6N5, Canada;Department of Civil Engineering, York University, 4700 Keele St., Toronto ON M3J 1P3, Canada;

关键词: Composite columns;    Light gauge steel;    Compressive strength capacity;    Full-scale testing;   

DOI  :  10.1016/j.cscm.2016.08.001

来源: DOAJ

【 摘 要 】

The axial compressive strength capacity of concrete-filled light gauge steel composite columns was assessed through an experimental program involving twelve long and fourteen stub columns with width-to-thickness ratio of 125 for the encasing steel section. A comparison between concrete-only and confined stub columns demonstrated that the stub column experiences an increase of strength of up to 16% due to confinement. The compressive strength contribution of the light gauge steel section was limited by local buckling. Specifically, the steel-only stub column sections lacking the concrete core experienced, on average, approximately 33% of its full compressive strength. The full-scale composite columns illustrated that the axial compressive strength capacity was controlled by end bearing capacity and local buckling of the light gauge steel. The axial compression strength capacity of the full-scale composite columns was satisfactorily predicted based on end bearing resistance of the concrete core and local strains in the light gauge steel. Furthermore, the 33% strength contribution established from the steel-only sections provided a satisfactory lower bound estimate for the calculation of axial compressive strength.

【 授权许可】

Unknown