Numerical modelling of concrete-filled steel tubular short columns under axial compression
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 eva...
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Published in | Građevinski materijali i konstrukcije Vol. 66; no. 2; pp. 93 - 106 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Society for Materials and Structures testing of Serbia
01.01.2023
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Subjects | |
Online Access | Get full text |
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Summary: | 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%o 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. |
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ISSN: | 2217-8139 |
DOI: | 10.5937/GRMK2300004N |