Bearing Capacities of Different-Diameter Concrete-Filled Steel Tubes under Axial Compression
The bearing capacities of concrete-filled steel tubes are normally derived through experiments with small-scale specimens, but it is uncertain whether such derivations are appropriate for the much larger components used in practical engineering. This study therefore investigates the effect of differ...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/7982365 |
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| author | Wenjing Wang Zhenyun Tang Zhenbao Li Hua Ma |
| author_facet | Wenjing Wang Zhenyun Tang Zhenbao Li Hua Ma |
| author_sort | Wenjing Wang |
| collection | DOAJ |
| description | The bearing capacities of concrete-filled steel tubes are normally derived through experiments with small-scale specimens, but it is uncertain whether such derivations are appropriate for the much larger components used in practical engineering. This study therefore investigates the effect of different diameters (219, 426, 630, and 820 mm) on the axial compression of short concrete columns in steel (Q235) tubes. It is found that the peak nominal stress decreases with increasing specimen size and that the axial bearing capacity is determined by three separate components: the cylinder compressive strength of the concrete, the improvement in strength due to the confining effect of the steel tube, and the longitudinal strength of the steel tube. At peak load, increases in the specimen diameter reduce the hoop stresses in the steel tube, thereby reducing the strengthening effect of confinement. Vertical stress in the steel tube is increased with diameter; therefore, the axial bearing capacity of the steel tube is directly related to the specimen size. Size effect coefficients for these three aspects of bearing capacity are defined and used to develop a size-dependent model for predicting the axial bearing capacity of large, concrete-filled steel tubes. The model is then validated against experimental data. |
| format | Article |
| id | doaj-art-46ae1add8e824422ab718aa67cd62950 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-46ae1add8e824422ab718aa67cd629502025-02-03T00:59:51ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/79823657982365Bearing Capacities of Different-Diameter Concrete-Filled Steel Tubes under Axial CompressionWenjing Wang0Zhenyun Tang1Zhenbao Li2Hua Ma3Beijing University of Technology, Key Laboratory of Urban Security and Disaster Engineering of Education Ministry, Beijing, ChinaBeijing University of Technology, Key Laboratory of Urban Security and Disaster Engineering of Education Ministry, Beijing, ChinaBeijing University of Technology, Key Laboratory of Urban Security and Disaster Engineering of Education Ministry, Beijing, ChinaBeijing University of Technology, Key Laboratory of Urban Security and Disaster Engineering of Education Ministry, Beijing, ChinaThe bearing capacities of concrete-filled steel tubes are normally derived through experiments with small-scale specimens, but it is uncertain whether such derivations are appropriate for the much larger components used in practical engineering. This study therefore investigates the effect of different diameters (219, 426, 630, and 820 mm) on the axial compression of short concrete columns in steel (Q235) tubes. It is found that the peak nominal stress decreases with increasing specimen size and that the axial bearing capacity is determined by three separate components: the cylinder compressive strength of the concrete, the improvement in strength due to the confining effect of the steel tube, and the longitudinal strength of the steel tube. At peak load, increases in the specimen diameter reduce the hoop stresses in the steel tube, thereby reducing the strengthening effect of confinement. Vertical stress in the steel tube is increased with diameter; therefore, the axial bearing capacity of the steel tube is directly related to the specimen size. Size effect coefficients for these three aspects of bearing capacity are defined and used to develop a size-dependent model for predicting the axial bearing capacity of large, concrete-filled steel tubes. The model is then validated against experimental data.http://dx.doi.org/10.1155/2016/7982365 |
| spellingShingle | Wenjing Wang Zhenyun Tang Zhenbao Li Hua Ma Bearing Capacities of Different-Diameter Concrete-Filled Steel Tubes under Axial Compression Advances in Materials Science and Engineering |
| title | Bearing Capacities of Different-Diameter Concrete-Filled Steel Tubes under Axial Compression |
| title_full | Bearing Capacities of Different-Diameter Concrete-Filled Steel Tubes under Axial Compression |
| title_fullStr | Bearing Capacities of Different-Diameter Concrete-Filled Steel Tubes under Axial Compression |
| title_full_unstemmed | Bearing Capacities of Different-Diameter Concrete-Filled Steel Tubes under Axial Compression |
| title_short | Bearing Capacities of Different-Diameter Concrete-Filled Steel Tubes under Axial Compression |
| title_sort | bearing capacities of different diameter concrete filled steel tubes under axial compression |
| url | http://dx.doi.org/10.1155/2016/7982365 |
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