A visco-elastic GBT-based finite element for steel-concrete composite beams

David Henriques, Rodrigo Gonçalves, Dinar Camotim

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


This paper reports the latest developments concerning the use of Generalised Beam Theory (GBT) in the field of steel-concrete composite beams. In particular, a GBT-based finite element is presented that uses a linear visco-elastic material law to capture, accurately and efficiently (with a very low computational cost), the effects of concrete creep, as well as cross-section distortion and shear lag in complex cross-sections (combining closed cells and open branches). It is shown that the versatility of the GBT approach makes it possible to obtain accurate solutions with a fairly small number of cross-section deformation modes (cross-section DOFs), leading to significant computational savings with respect to standard shell finite element models. Several numerical examples are presented, to illustrate the capabilities and potential of the proposed GBT-based finite element.

Original languageEnglish
Article number106440
Number of pages11
JournalThin-Walled Structures
Publication statusPublished - 1 Dec 2019


  • Concrete creep
  • Cross-section deformation
  • Generalised beam theory (GBT)
  • Shear lag
  • Steel-concrete composite beams
  • Visco-elasticity


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