Recent developments in the GBT-based numerical modeling of steel-concrete composite beams

Rodrigo Gonçalves, David Henriques, Dinar Camotim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents the latest developments concerning the numerical modeling of steel-concrete composite beams using GBT-based (beam) finite elements. In particular, it is shown that GBT makes it possible to assess, accurately and with computational efficiency, the buckling (bifurcation) behavior of steel-concrete composite beams subjected to negative (hogging) bending. Two relevant buckling phenomena are considered, namely (i) local buckling of the web (plate-like), possibly involving the torsional rotation of the compression flange, and (ii) distortional buckling, combining a lateral displacement/rotation of the lower flange with cross-section transverse bending. The determination of the buckling loads is performed in two stages: (i) a pre-buckling analysis is first carried out, accounting for shear lag and concrete cracking effects, and (ii) an eigenvalue buckling analysis is performed next, on the basis of the calculated pre-buckling stresses, allowing for cross-section distortion and plate bending. Several numerical examples are presented, illustrating the application of the proposed GBT- based finite element and providing clear evidence of its capabilities and potential.

Original languageEnglish
Title of host publicationStructural Stability Research Council Annual Stability Conference 2016, SSRC 2016
PublisherStructural Stability Research Council (SSRC)
Pages471-486
Number of pages16
ISBN (Electronic)978-151082302-0
Publication statusPublished - 2016
EventStructural Stability Research Council Annual Stability Conference 2016, SSRC 2016 - Orlando, United States
Duration: 12 Apr 201615 Apr 2016

Conference

ConferenceStructural Stability Research Council Annual Stability Conference 2016, SSRC 2016
CountryUnited States
CityOrlando
Period12/04/1615/04/16

Keywords

  • Beams and girders
  • Composite beams and girders
  • Computational efficiency
  • Concretes
  • Eigenvalues and eigenfunctions
  • Flanges
  • Numerical models
  • Plates (structural components)
  • Shear flow
  • Stability

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