The paper discusses the structural behaviour of concrete-filled steel tube columns (CFT)
when applied to the top-down construction method as temporary internal supports for ceilings. Their
ultimate capacity to take into account the actual boundary conditions of the column is essential for
successful application in construction. The paper presents the full-scale in situ testing of four slender
specimens with variable D/t ratios under concentric axial loading. The CFT columns were supported
on the previously jacked concrete piles. In addition, detailed finite element numerical models in
ABAQUS and PLAXIS computer programs were developed. The models include the nonlinear
behaviour of materials and the nonlinear behaviour of soil. The soil–pile–column interaction and
impact of the CFT column–pile connection stiffness on global column stability were considered.
The numerical model was validated by comparison with the experimental results. In conclusion,
the coefficient for the eff...ective buckling length of the studied columns is proposed. Finally, the
experimental results of the critical buckling forces were compared with widely used international
design codes Eurocode 4-EC4, American standard-ACI and the Australian standard-AS.
Keywords:
concrete-filled steel tube / top-down construction method / experimental investigation / FEM modelling / buckling force / effective buckling length
TY - JOUR
AU - Lazović Radovanović, Marija
AU - Nikolić, Jelena
AU - Radovanović, Janko
AU - Kostić, Svetlana M.
PY - 2022
UR - https://grafar.grf.bg.ac.rs/handle/123456789/2655
AB - The paper discusses the structural behaviour of concrete-filled steel tube columns (CFT)
when applied to the top-down construction method as temporary internal supports for ceilings. Their
ultimate capacity to take into account the actual boundary conditions of the column is essential for
successful application in construction. The paper presents the full-scale in situ testing of four slender
specimens with variable D/t ratios under concentric axial loading. The CFT columns were supported
on the previously jacked concrete piles. In addition, detailed finite element numerical models in
ABAQUS and PLAXIS computer programs were developed. The models include the nonlinear
behaviour of materials and the nonlinear behaviour of soil. The soil–pile–column interaction and
impact of the CFT column–pile connection stiffness on global column stability were considered.
The numerical model was validated by comparison with the experimental results. In conclusion,
the coefficient for the effective buckling length of the studied columns is proposed. Finally, the
experimental results of the critical buckling forces were compared with widely used international
design codes Eurocode 4-EC4, American standard-ACI and the Australian standard-AS.
T2 - Applied Sciences
T1 - Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method
VL - 12(8), 3771
DO - https://doi.org/10.3390/app12083771
ER -
@article{
author = "Lazović Radovanović, Marija and Nikolić, Jelena and Radovanović, Janko and Kostić, Svetlana M.",
year = "2022",
abstract = "The paper discusses the structural behaviour of concrete-filled steel tube columns (CFT)
when applied to the top-down construction method as temporary internal supports for ceilings. Their
ultimate capacity to take into account the actual boundary conditions of the column is essential for
successful application in construction. The paper presents the full-scale in situ testing of four slender
specimens with variable D/t ratios under concentric axial loading. The CFT columns were supported
on the previously jacked concrete piles. In addition, detailed finite element numerical models in
ABAQUS and PLAXIS computer programs were developed. The models include the nonlinear
behaviour of materials and the nonlinear behaviour of soil. The soil–pile–column interaction and
impact of the CFT column–pile connection stiffness on global column stability were considered.
The numerical model was validated by comparison with the experimental results. In conclusion,
the coefficient for the effective buckling length of the studied columns is proposed. Finally, the
experimental results of the critical buckling forces were compared with widely used international
design codes Eurocode 4-EC4, American standard-ACI and the Australian standard-AS.",
journal = "Applied Sciences",
title = "Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method",
volume = "12(8), 3771",
doi = "https://doi.org/10.3390/app12083771"
}
Lazović Radovanović, M., Nikolić, J., Radovanović, J.,& Kostić, S. M.. (2022). Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method. in Applied Sciences, 12(8), 3771.
https://doi.org/https://doi.org/10.3390/app12083771
Lazović Radovanović M, Nikolić J, Radovanović J, Kostić SM. Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method. in Applied Sciences. 2022;12(8), 3771.
doi:https://doi.org/10.3390/app12083771 .
Lazović Radovanović, Marija, Nikolić, Jelena, Radovanović, Janko, Kostić, Svetlana M., "Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method" in Applied Sciences, 12(8), 3771 (2022),
https://doi.org/https://doi.org/10.3390/app12083771 . .
