Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/8/3771 |
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| author | Marija M. Lazovic Radovanovic Jelena Z. Nikolic Janko R. Radovanovic Svetlana M. Kostic |
| author_facet | Marija M. Lazovic Radovanovic Jelena Z. Nikolic Janko R. Radovanovic Svetlana M. Kostic |
| author_sort | Marija M. Lazovic Radovanovic |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-09T11:12:44Z |
| format | Article |
| id | doaj.art-29bd54c698c6462ea40589ad8dd61c7a |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T11:12:44Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-29bd54c698c6462ea40589ad8dd61c7a2023-12-01T00:38:21ZengMDPI AGApplied Sciences2076-34172022-04-01128377110.3390/app12083771Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction MethodMarija M. Lazovic Radovanovic0Jelena Z. Nikolic1Janko R. Radovanovic2Svetlana M. Kostic3Faculty of Civil Engineering, The University of Belgrade, Bulevar Kralja Aleksandra 73, 11000 Belgrade, SerbiaFaculty of Civil Engineering, The University of Belgrade, Bulevar Kralja Aleksandra 73, 11000 Belgrade, SerbiaBeoexpert Design Ltd., Ruzveltova 23, 11000 Belgrade, SerbiaFaculty of Civil Engineering, The University of Belgrade, Bulevar Kralja Aleksandra 73, 11000 Belgrade, SerbiaThe 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.https://www.mdpi.com/2076-3417/12/8/3771concrete-filled steel tubetop-down construction methodexperimental investigationFEM modellingbuckling forceeffective buckling length |
| spellingShingle | Marija M. Lazovic Radovanovic Jelena Z. Nikolic Janko R. Radovanovic Svetlana M. Kostic Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method Applied Sciences concrete-filled steel tube top-down construction method experimental investigation FEM modelling buckling force effective buckling length |
| title | Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method |
| title_full | Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method |
| title_fullStr | Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method |
| title_full_unstemmed | Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method |
| title_short | Structural Behaviour of Axially Loaded Concrete-Filled Steel Tube Columns during the Top-Down Construction Method |
| title_sort | structural behaviour of axially loaded concrete filled steel tube columns during the top down construction method |
| topic | concrete-filled steel tube top-down construction method experimental investigation FEM modelling buckling force effective buckling length |
| url | https://www.mdpi.com/2076-3417/12/8/3771 |
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