Finite Element Modelling of Concrete-Encased Steel Columns Subjected to Eccentric Loadings

Anuntasena, Worakarn; Lenwari, Akhrawat; Thepchatri, Thaksin

doi:10.4186/ej.2019.23.6.299

Cited by 11 publications

(7 citation statements)

References 11 publications

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“…Thumrongvut and Tiwjantuk (2018) presented the experimental results on the strength and axial behavior of rectangular steel tube columns filled with Cellular Lightweight Concrete (CLC) under axial compression. Anuntasena et al (2019) presented the 3D Finite Element (FE) analysis of the Concrete-Encased Steel (CES) columns subjected to concentric or eccentric loadings. Ivanov (2019) studied small vibrations of a cylindrical shaft caused by inertial excitation.…”

Section: Review Of the Literaturementioning

confidence: 99%

Experimental Comparison of the Known Hypotheses of the Lateral Buckling for Semi-Slender Pinned Columns

Murawski¹

2021

International Journal of Structural Glass and Advanced Material

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The paper presents the comparison of experimental results obtained from tests on semi-slender columns with pinned ends made of steel R35 to simplifications and hypotheses of loss of stability by lateral buckling in elastic-plastic states of columns axially compressed by force. The Tetmajer-Jasiński's and Johnson-Ostenfeld's simplifications, as well as the hypotheses given by Engesser and Kármán and Shanley, Ylinen, Březina, Pearson and Bleich and Vol'mir and the author's one approximated, are analyzed. The graphs of surface functions of critical compressive stress cr(A, L*t) depending on a cross-section area and length times thickness product are presented as the theoretical examples of thin-walled cylindrical and square columns made of steel R35. In order to compare the experimental results with other simplifications and hypotheses are shown in the adequate ranges for elastic-plastic states as the graphs of the functions of critical compressive stress depending on slenderness ratio cr().

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Section: Review Of the Literaturementioning

confidence: 99%

Experimental Comparison of the Known Hypotheses of the Lateral Buckling for Semi-Slender Pinned Columns

Murawski¹

2021

International Journal of Structural Glass and Advanced Material

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“…Thumrongvut and Tiwjantuk (2018) analysed strength and axial behavior of cellular lightweight concrete-filled steel rectangular tube columns under axial compression. Anuntasena et al (2019) presented the 3D finite element analysis of the concrete-encased steel columns subjected to concentric or eccentric loadings. Ivanov (2019a) did a theoretical study of small vibrations of two rigid bodies with damping and next Ivanov (2019b) analyzed vibrations of a shaft caused by inertial excitations.…”

Section: Literature Reviewmentioning

confidence: 99%

Stability, Stress and Strain Analysis of Very Slender Pinned Thin-Walled Box Columns according to FEM, Euler and TSTh

Murawski¹,

Wahrhaftig²

2021

American Journal of Engineering and Applied Sciences

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In this study, a Finite Element Method (FEM) analysis is presented for the loss of stability in elastic states of very slender pinned without friction box-section thin-walled column axially compressed. From the FEM buckling linear stress analyses are determined the compressing critical forces for 36 cases, presented in tables and as the surface functions in dependence on the slenderness ratio and cross-section. Also are presented graphs obtained from the FEM post-buckling linear stress analysis for the elastic central line, slope, deflection and states of the stresses and strains of the box-section column 202812500 mm made of steel, by the assumption that a maximal deflection equals the half of a side dimension. The obtained from the FEM computing function and surface graphs are compared and then discussed with graphs corresponding to Euler's and Technical Stability Theory (TSTh) results. Finally are compared graphs of the stresses and strains of box-section thin-walled column 202812500 obtained from FEM and TSTh, but under compressing critical force determined according to TSTh.

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“…A signifcant amount of experimental and few numerical investigations was performed on the strength and failure modes of FEC columns under concentric and eccentric loading conditions. According to [6,[9][10][11][12], the failure mechanism of FEC columns with a slenderness ratio of up to 25 is initiated by both crushing of concrete on the compression side and tensile damage of concrete on the tension side followed by the yielding of structural steel and longitudinal reinforcement. On the other hand, for columns with a large slenderness ratio (L/D > 25), the failure mode is only due to tensile damage of concrete and a fexural buckling of the column.…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanical Behavior of Fully Encased Composite Slender Columns with High-Strength Concrete Using FEM Simulation

Melesse

Jima

Asale

et al. 2023

Advances in Civil Engineering

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The most common types of composite columns used in high-rise structures are concrete-filled steel tubes (CFSTs) and concrete-encased steel (CES) that are either entirely or partially encased in concrete. The attempt of this study is to develop a suitable constitutive model addressing the behavior of fully encased composite slender columns with high-strength concrete subjected to axial loading. The nonlinear finite element (FE) package ABAQUS version 6.14-2 is used to study the response of fully encased composite (FEC) slender columns. The finite element analysis (FEA) results are validated with experimental data extracted from previous experiments. Then, the parametric study is conducted on rectangular FEC columns with different shapes of encased steel encasements to investigate the axial load-carrying capacities, axial deformation, ductility, load-deformation behavior, and confinement of FEC columns. The governing parameters for the current study are the high strength of concrete (90 MPa, 100 MPa, and 120 MPa), shapes of encased steel sections (circular, I-shaped, and rectangular steel encasements), and spacing of tie bars (50 mm, 100 mm and 150 mm). 6–21% of load increment is observed by changing the concrete compressive strength. A comparison is also made between the results of reinforced concrete and FEC slender columns and 2–11% of load increment is recorded by changing the shape of structural steel and keeping other parameters constant. The results of calibrated finite element models revealed that closely spaced tie bars resulted in a good ductility of FEC column with high-strength concrete (HSC). Significant enhancements in the axial load capacity are observed in the case of FEC slender columns than in RC slender columns of the same size and shape. Ductility and residual strength after the failure of FEC columns are also observed to increase significantly with the adoption of tubular structural steel sections. However, increasing the concrete strength results in the reduction of this ductility.

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Finite Element Modelling of Concrete-Encased Steel Columns Subjected to Eccentric Loadings

Cited by 11 publications

References 11 publications

Experimental Comparison of the Known Hypotheses of the Lateral Buckling for Semi-Slender Pinned Columns

Experimental Comparison of the Known Hypotheses of the Lateral Buckling for Semi-Slender Pinned Columns

Stability, Stress and Strain Analysis of Very Slender Pinned Thin-Walled Box Columns according to FEM, Euler and TSTh

Study on Mechanical Behavior of Fully Encased Composite Slender Columns with High-Strength Concrete Using FEM Simulation

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