Implementation of buckling in the simplified method of EC4-1-1 for CFT sections

  • Albert Albareda-Valls
  • Jordi Maristany Carreras
  • Lucrecia Calderón Valdiviezo
  • Carlos Muñoz Blanc
Keywords: Composite columns, Concrete filled tubes, Eurocode, Interaction diagram

Abstract


Eurocode 4 about composite structures proposes a simplified method to design concrete-filled tube sections subjected to combined compression andbi-axial bending, as an alternative to the general one. This method is based on determining the validity of a section by comparing the acting forceswith the interaction curve N–M. In order to take slenderness into account, a reduction factor χ is defined, leading to a reduction of the compressionand bending strength. This text proposes a new approach based on the simplified method mentioned above, thought to provide designers a fasterand simpler checking and designing method for this typology of sections, including also buckling effects. With this purpose, a polynomial function is proposed depending on five known parameters: χ, χd, χpm,r and μmax, for which a new formulation is presented.

Published
2019-04-29
How to Cite
Albareda-Valls, A., Maristany Carreras, J., Calderón Valdiviezo, L., & Muñoz Blanc, C. (2019). Implementation of buckling in the simplified method of EC4-1-1 for CFT sections. Hormigón Y Acero, 70(288), 21-33. https://doi.org/10.33586/hya.2019.001