Bearing capacity and stability of elastically fixed cft slender columns
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 bifurcationSource:
Tehnički vjesnik / Technical Gazette, 2017, 24, 3, 967-973Publisher:
- Strojarski Facultet
Funding / projects:
DOI: 10.17559/TV-20150806093823
ISSN: 1330-3651
WoS: 000403788500042
Scopus: 2-s2.0-85020915393
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Institution/Community
GraFarTY - JOUR AU - Lazović, Marija AU - Radovanović, Janko AU - Deretić-Stojanović, Biljana PY - 2017 UR - https://grafar.grf.bg.ac.rs/handle/123456789/844 AB - 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. PB - Strojarski Facultet T2 - Tehnički vjesnik / Technical Gazette T1 - Bearing capacity and stability of elastically fixed cft slender columns EP - 973 IS - 3 SP - 967 VL - 24 DO - 10.17559/TV-20150806093823 ER -
@article{ author = "Lazović, Marija and Radovanović, Janko and Deretić-Stojanović, Biljana", year = "2017", 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.", publisher = "Strojarski Facultet", journal = "Tehnički vjesnik / Technical Gazette", title = "Bearing capacity and stability of elastically fixed cft slender columns", pages = "973-967", number = "3", volume = "24", doi = "10.17559/TV-20150806093823" }
Lazović, M., Radovanović, J.,& Deretić-Stojanović, B.. (2017). Bearing capacity and stability of elastically fixed cft slender columns. in Tehnički vjesnik / Technical Gazette Strojarski Facultet., 24(3), 967-973. https://doi.org/10.17559/TV-20150806093823
Lazović M, Radovanović J, Deretić-Stojanović B. Bearing capacity and stability of elastically fixed cft slender columns. in Tehnički vjesnik / Technical Gazette. 2017;24(3):967-973. doi:10.17559/TV-20150806093823 .
Lazović, Marija, Radovanović, Janko, Deretić-Stojanović, Biljana, "Bearing capacity and stability of elastically fixed cft slender columns" in Tehnički vjesnik / Technical Gazette, 24, no. 3 (2017):967-973, https://doi.org/10.17559/TV-20150806093823 . .