HARRAT, Oulfa2024-12-182024-12-182024https://dspace.univ-annaba.dz//handle/123456789/3700built-up cold-formed steel sections CFS have been increasingly developed and utilized in recent years, especialy in the construction industry ,due to thier numerous functional and architectural advantages such as improved load-bearingPDFenbuilt-up sections; cfs; instability modes; experimental; configurations; finite; element; axial compression; confinementNumerical and experimental study of mechanical behavior of coled-formed steel compressed columns filled and unfilled with concreteThesis