The paper presents three-dimensional numerical models of short concrete-filled
steel tubular circular columns that can successfully describe the column behaviour
under axial compression. Several of the most commonly used material models for
the steel part and a concrete portion of the column are evaluated in the models. In
addition, the paper presents a new proposal for the extension of the Eurocode 2
stress-strain relation to make it suitable for describing the complex behaviour of
concrete inside the steel tube. This model overcomes the current limitations of the
Eurocode 2 design guide, referring to the limitation for the concrete curve in
compression to 3.5‰ strain. The ultimate axial column strength obtained by the
proposed model is compared to the ultimate column capacity calculated by a
simplified method provided in Eurocode 4. All presented numerical models are
validated on a set of experiments from the literature and demonstrate good
agreement. The comments about t...he accuracy of each model are provided, along
with the identified limitations.
Keywords:
composite columns / nonlinear analysis / 3D FEM model / concrete material model / Eurocode 4
TY - JOUR
AU - Nikolić, Jelena
AU - Kostić, Svetlana
AU - Stošić, Saša
PY - 2023
UR - https://grafar.grf.bg.ac.rs/handle/123456789/3118
AB - The paper presents three-dimensional numerical models of short concrete-filled
steel tubular circular columns that can successfully describe the column behaviour
under axial compression. Several of the most commonly used material models for
the steel part and a concrete portion of the column are evaluated in the models. In
addition, the paper presents a new proposal for the extension of the Eurocode 2
stress-strain relation to make it suitable for describing the complex behaviour of
concrete inside the steel tube. This model overcomes the current limitations of the
Eurocode 2 design guide, referring to the limitation for the concrete curve in
compression to 3.5‰ strain. The ultimate axial column strength obtained by the
proposed model is compared to the ultimate column capacity calculated by a
simplified method provided in Eurocode 4. All presented numerical models are
validated on a set of experiments from the literature and demonstrate good
agreement. The comments about the accuracy of each model are provided, along
with the identified limitations.
T2 - Building Materials and Structures
T1 - Numerical modelling of concrete-filled steel tubular short columns under axial compression
IS - 66
DO - 10.5937/GRMK2300004N
ER -
@article{
author = "Nikolić, Jelena and Kostić, Svetlana and Stošić, Saša",
year = "2023",
abstract = "The paper presents three-dimensional numerical models of short concrete-filled
steel tubular circular columns that can successfully describe the column behaviour
under axial compression. Several of the most commonly used material models for
the steel part and a concrete portion of the column are evaluated in the models. In
addition, the paper presents a new proposal for the extension of the Eurocode 2
stress-strain relation to make it suitable for describing the complex behaviour of
concrete inside the steel tube. This model overcomes the current limitations of the
Eurocode 2 design guide, referring to the limitation for the concrete curve in
compression to 3.5‰ strain. The ultimate axial column strength obtained by the
proposed model is compared to the ultimate column capacity calculated by a
simplified method provided in Eurocode 4. All presented numerical models are
validated on a set of experiments from the literature and demonstrate good
agreement. The comments about the accuracy of each model are provided, along
with the identified limitations.",
journal = "Building Materials and Structures",
title = "Numerical modelling of concrete-filled steel tubular short columns under axial compression",
number = "66",
doi = "10.5937/GRMK2300004N"
}
Nikolić, J., Kostić, S.,& Stošić, S.. (2023). Numerical modelling of concrete-filled steel tubular short columns under axial compression. in Building Materials and Structures(66).
https://doi.org/10.5937/GRMK2300004N
Nikolić J, Kostić S, Stošić S. Numerical modelling of concrete-filled steel tubular short columns under axial compression. in Building Materials and Structures. 2023;(66).
doi:10.5937/GRMK2300004N .
Nikolić, Jelena, Kostić, Svetlana, Stošić, Saša, "Numerical modelling of concrete-filled steel tubular short columns under axial compression" in Building Materials and Structures, no. 66 (2023),
https://doi.org/10.5937/GRMK2300004N . .
