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Bearing capacity and stability of elastically fixed cft slender columns

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2017
842.pdf (1.389Mb)
Authors
Lazović, Marija
Radovanović, Janko
Deretić-Stojanović, Biljana
Article (Published version)
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Abstract
CFT columns are one of the basic structural elements in "top-down" construction method. Because of the large depth of excavation the question of stability of these columns raises. This paper presents a procedure for calculation of critical buckling force of CFT columns which are on the upper side elastically fixed in the concrete ceiling and on the bottom side elastically fixed in the drilled pile. Using computer programs ABAQUS 6.12 and LPILE, as well as appropriate constitutive models the boundary conditions on the upper and lower end of the CFT columns are determined. For a building called "Cvijetni prolaz" in Zagreb, using program created in Excel the critical buckling force of elastically fixed CFT columns is determined. The dependence of the critical buckling force decreasing with increasing depth of excavation is presented. The impact of concrete class, diameter and wall thickness of the steel section, length and diameter of the pile, the thickness of the ceiling on the critical... buckling force of CFT columns is analysed. The results are shown in diagrams and tables.

Keywords:
CFT column / FEM / p-y curve / stability of bifurcation
Source:
Tehnički vjesnik / Technical Gazette, 2017, 24, 3, 967-973
Publisher:
  • Strojarski Facultet
Projects:
  • Energy efficiency enhancement of buildings in Serbia and improvement of national regulative capacity for they are certification (RS-42012)

DOI: 10.17559/TV-20150806093823

ISSN: 1330-3651

WoS: 000403788500042

Scopus: 2-s2.0-85020915393
[ Google Scholar ]
URI
http://grafar.grf.bg.ac.rs/handle/123456789/844
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  • Radovi istraživača / Researcher's publications
  • Катедра за техничку механику и теорију конструкција
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