Study of the Axial Compressive Behaviour of Cross-Shaped CFST and ST Columns with Inner Changes
In this study, novel cross-shaped concrete-filled steel tube (CFST) and steel tube (ST) columns were developed. CFST columns have a high load-carrying capacity and excellent performance under seismic conditions, and the construction process is fast. In order to investigate the axial load bearings an...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/2/423 |
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| author | Zhong Tao Md Mehedi Hasan Dongji Han Qiudong Qin Wahab Abdul Ghafar |
| author_facet | Zhong Tao Md Mehedi Hasan Dongji Han Qiudong Qin Wahab Abdul Ghafar |
| author_sort | Zhong Tao |
| collection | DOAJ |
| description | In this study, novel cross-shaped concrete-filled steel tube (CFST) and steel tube (ST) columns were developed. CFST columns have a high load-carrying capacity and excellent performance under seismic conditions, and the construction process is fast. In order to investigate the axial load bearings and failure mechanisms, six specimens of CFST and ST columns were tested under the axial load. Three different forms of CFST were employed in this study; one was an ordinary cross-shaped CFST (OC-CFST), while the other two were executed with significant inner changes; namely, stiffeners cross-shaped CFST (SC-CFST), and multi-cell cross-shaped CFST (MC-CFST) filled with concrete. The other group has the same OC-ST, SC-ST, and MC-ST, but these test subjects were without filled concrete. Through discussion of the failure mechanism, load displacement and load strain correlations are determined. The effects of parameters on ultimate resistance, failure pattern, and ductility index were studied. The axial load-carrying performance of the cross-shaped CFST columns was 75–80% better than that of ST columns; and each ST column displayed cooperative behavior. The finite element model (FEM) was simulated, and the outcomes of the experiments were used to validate it. The load–displacement relationships were established using parametric analysis. Existing design standards were used to calculate CFST column loading capacity. Finally, mathematical formulas were improvised to determine the ultimate load of the cross-shaped CFST column. |
| first_indexed | 2024-03-11T09:04:05Z |
| format | Article |
| id | doaj.art-6f5b3ed8ca674f22a590e6627db93bd3 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T09:04:05Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-6f5b3ed8ca674f22a590e6627db93bd32023-11-16T19:32:26ZengMDPI AGBuildings2075-53092023-02-0113242310.3390/buildings13020423Study of the Axial Compressive Behaviour of Cross-Shaped CFST and ST Columns with Inner ChangesZhong Tao0Md Mehedi Hasan1Dongji Han2Qiudong Qin3Wahab Abdul Ghafar4Civil Engineering and Architecture Faculty, Kunming University of Science and Technology, Kunming 650500, ChinaCivil Engineering and Architecture Faculty, Kunming University of Science and Technology, Kunming 650500, ChinaCivil Engineering and Architecture Faculty, Kunming University of Science and Technology, Kunming 650500, ChinaCivil Engineering and Architecture Faculty, Kunming University of Science and Technology, Kunming 650500, ChinaCivil Engineering and Architecture Faculty, Kunming University of Science and Technology, Kunming 650500, ChinaIn this study, novel cross-shaped concrete-filled steel tube (CFST) and steel tube (ST) columns were developed. CFST columns have a high load-carrying capacity and excellent performance under seismic conditions, and the construction process is fast. In order to investigate the axial load bearings and failure mechanisms, six specimens of CFST and ST columns were tested under the axial load. Three different forms of CFST were employed in this study; one was an ordinary cross-shaped CFST (OC-CFST), while the other two were executed with significant inner changes; namely, stiffeners cross-shaped CFST (SC-CFST), and multi-cell cross-shaped CFST (MC-CFST) filled with concrete. The other group has the same OC-ST, SC-ST, and MC-ST, but these test subjects were without filled concrete. Through discussion of the failure mechanism, load displacement and load strain correlations are determined. The effects of parameters on ultimate resistance, failure pattern, and ductility index were studied. The axial load-carrying performance of the cross-shaped CFST columns was 75–80% better than that of ST columns; and each ST column displayed cooperative behavior. The finite element model (FEM) was simulated, and the outcomes of the experiments were used to validate it. The load–displacement relationships were established using parametric analysis. Existing design standards were used to calculate CFST column loading capacity. Finally, mathematical formulas were improvised to determine the ultimate load of the cross-shaped CFST column.https://www.mdpi.com/2075-5309/13/2/423cross-shaped CFST columnmulti-cell CFST columnstiffened columnsteel tube columnFEM analysisstructural application |
| spellingShingle | Zhong Tao Md Mehedi Hasan Dongji Han Qiudong Qin Wahab Abdul Ghafar Study of the Axial Compressive Behaviour of Cross-Shaped CFST and ST Columns with Inner Changes Buildings cross-shaped CFST column multi-cell CFST column stiffened column steel tube column FEM analysis structural application |
| title | Study of the Axial Compressive Behaviour of Cross-Shaped CFST and ST Columns with Inner Changes |
| title_full | Study of the Axial Compressive Behaviour of Cross-Shaped CFST and ST Columns with Inner Changes |
| title_fullStr | Study of the Axial Compressive Behaviour of Cross-Shaped CFST and ST Columns with Inner Changes |
| title_full_unstemmed | Study of the Axial Compressive Behaviour of Cross-Shaped CFST and ST Columns with Inner Changes |
| title_short | Study of the Axial Compressive Behaviour of Cross-Shaped CFST and ST Columns with Inner Changes |
| title_sort | study of the axial compressive behaviour of cross shaped cfst and st columns with inner changes |
| topic | cross-shaped CFST column multi-cell CFST column stiffened column steel tube column FEM analysis structural application |
| url | https://www.mdpi.com/2075-5309/13/2/423 |
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