Abstract
The article presents the derivation of the FEM equations, which make possible to calculate short concrete-filled steel tubular columns in a plane elastic formulation. Steel tube is modeled by 1D bar finite elements. The obtained results are compared with the results of calculations using 3D solid and shell finite elements.
Highlights
In modern high-rise construction, steel-reinforced concrete structures are widely used, including structures consisting of a concrete core and a steel tube
Correct accounting of the tube affect on the concrete core stress-strain state is possible only when using volumetric finite elements for concrete and shell ones for steel [1; 2]
The obtained results will be compared with the results of calculations in the ANSYS software using volumetric finite elements for concrete and shell ones for a steel tube
Summary
In modern high-rise construction, steel-reinforced concrete structures are widely used, including structures consisting of a concrete core and a steel tube. More acute is the question of improving regulato-. Ry documentation, increasing the economic efficiency and reliability of such structures based on new theoretical and experimental data. Numerical modeling of the CFST columns deformations in existing finite element software requires significant computing power and time. Correct accounting of the tube affect on the concrete core stress-strain state is possible only when using volumetric finite elements for concrete and shell ones for steel [1; 2]
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