Steel and Composite Structures

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Tubular composite beam-columns of annular cross-sections and their design practice

  • Kvedaras, A.K. (Department of Steel and Timber Structures, Vilnius Gediminas Technical University) ;
  • Kudzys, A. (KTU Institute of Architecture and Construction)
  • Received : 2007.10.08
  • Accepted : 2009.11.26
  • Published : 2010.03.25
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Abstract

The expediency of using tubular composite steel and concrete columns of annular cross-sections in construction is discussed. The new type space framework with tubular composite columns of multi-storey buildings and its rigid beam-column joints are demonstrated. The features of interaction between the circular steel tube and spun concrete stress-strain states during the concentrical and eccentrical loading of tubular composite members are considered. The modeling of the bearing capacity of beam-columns of composite annular cross-sections is based on the concepts of bending with a concentrical force and compression with a bending moment. The comparison of modeling results for the composite cross-sections of beam-columns is analysed. The expediency of using these concepts for the limit state verification of beam-columns in the methods of the partial safety factors design (PSFD) legitimated in Europe and the load and resistance factors design (LRFD) used in other countries is presented and illustrated by a numerical example.

Keywords

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