Bearing behavior of high-performance concrete-filled high-strength steel tube composite columns subjected to eccentrical load
In order to study the bearing capacity of high-performance concrete-filled high-strength steel tube (HCHST) composite stub columns subjected to eccentrical load, 22 HCHST composite stub columns, 4 concrete-filled steel tube (CFST) composite stub columns and 8 high-performance concrete-filled steel t...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-07-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2022.972811/full |
| _version_ | 1811294667050844160 |
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| author | Liangqin Jiang Weichen Wang Jing Ji Jing Ji Hongguo Ren Qingqin Wang Ruohan Sun Chenyu Yu Huiling Zhang Gan Luo |
| author_facet | Liangqin Jiang Weichen Wang Jing Ji Jing Ji Hongguo Ren Qingqin Wang Ruohan Sun Chenyu Yu Huiling Zhang Gan Luo |
| author_sort | Liangqin Jiang |
| collection | DOAJ |
| description | In order to study the bearing capacity of high-performance concrete-filled high-strength steel tube (HCHST) composite stub columns subjected to eccentrical load, 22 HCHST composite stub columns, 4 concrete-filled steel tube (CFST) composite stub columns and 8 high-performance concrete-filled steel tube (HCST) composite stub columns were designed with the cubic compressive strength of concrete (fcu), the yield strength of steel tube (fy), the thickness of tube wall (t), the eccentricity (e) and slenderness ratio (λ) as the main parameters. Considering the nonlinear constitutive model of concrete and simplified constitutive model of steel, the finite element (FE) model of HCHST composite stub columns was established by ABAQUS software. By comparison with the existing test results, the rationality of the constitutive model and boundary conditions was verified. The variation of ultimate bearing capacity and the typical failure modes of HCHST composite stub columns under different parameters was analyzed. The results show that the specimens exhibit obvious bulge outward at the end of the steel tube and shear failure at the end of concrete. High-performance concrete (HPC) can significantly improve the ultimate eccentrical compression bearing capacity of composite columns, and high-strength steel tubes have better restraint effect on HPC. With the increasing of t, the ultimate eccentrical compression bearing capacity and the load-holding capacity of HCHST columns increases gradually, while the ultimate eccentrical compression bearing capacity decreases gradually with the increasing of λ and e. By introducing the reduction coefficient of eccentricity (φ1) and the reduction coefficient of slenderness ratio (φ2), the calculation formula of the eccentric bearing capacity of HCHST columns is proposed by statistical regression, which can lay a foundation for the application of HCHST columns in practical engineering. |
| first_indexed | 2024-04-13T05:21:47Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-04-13T05:21:47Z |
| publishDate | 2022-07-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Materials |
| spelling | doaj.art-1f03b45c5fee4609b5f3fa86091d5edc2022-12-22T03:00:44ZengFrontiers Media S.A.Frontiers in Materials2296-80162022-07-01910.3389/fmats.2022.972811972811Bearing behavior of high-performance concrete-filled high-strength steel tube composite columns subjected to eccentrical loadLiangqin Jiang0Weichen Wang1Jing Ji2Jing Ji3Hongguo Ren4Qingqin Wang5Ruohan Sun6Chenyu Yu7Huiling Zhang8Gan Luo9Heilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, Daqing, ChinaHeilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, Daqing, ChinaHeilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, Daqing, ChinaKey Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin, ChinaHandan Key Laboratory of Building Physical Environment and Regional Building Protection Technology, School of Architecture and Art, Hebei University of Engineering, Handan, ChinaChina Academy of Building Research Co., Ltd., Beijing, ChinaHandan Key Laboratory of Building Physical Environment and Regional Building Protection Technology, School of Architecture and Art, Hebei University of Engineering, Handan, ChinaHeilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, Daqing, ChinaHeilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, Daqing, ChinaHeilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, Daqing, ChinaIn order to study the bearing capacity of high-performance concrete-filled high-strength steel tube (HCHST) composite stub columns subjected to eccentrical load, 22 HCHST composite stub columns, 4 concrete-filled steel tube (CFST) composite stub columns and 8 high-performance concrete-filled steel tube (HCST) composite stub columns were designed with the cubic compressive strength of concrete (fcu), the yield strength of steel tube (fy), the thickness of tube wall (t), the eccentricity (e) and slenderness ratio (λ) as the main parameters. Considering the nonlinear constitutive model of concrete and simplified constitutive model of steel, the finite element (FE) model of HCHST composite stub columns was established by ABAQUS software. By comparison with the existing test results, the rationality of the constitutive model and boundary conditions was verified. The variation of ultimate bearing capacity and the typical failure modes of HCHST composite stub columns under different parameters was analyzed. The results show that the specimens exhibit obvious bulge outward at the end of the steel tube and shear failure at the end of concrete. High-performance concrete (HPC) can significantly improve the ultimate eccentrical compression bearing capacity of composite columns, and high-strength steel tubes have better restraint effect on HPC. With the increasing of t, the ultimate eccentrical compression bearing capacity and the load-holding capacity of HCHST columns increases gradually, while the ultimate eccentrical compression bearing capacity decreases gradually with the increasing of λ and e. By introducing the reduction coefficient of eccentricity (φ1) and the reduction coefficient of slenderness ratio (φ2), the calculation formula of the eccentric bearing capacity of HCHST columns is proposed by statistical regression, which can lay a foundation for the application of HCHST columns in practical engineering.https://www.frontiersin.org/articles/10.3389/fmats.2022.972811/fullHCHST composite stub columnshigh-performance concretehigh-strength steeleccentrical loadbearing capacity |
| spellingShingle | Liangqin Jiang Weichen Wang Jing Ji Jing Ji Hongguo Ren Qingqin Wang Ruohan Sun Chenyu Yu Huiling Zhang Gan Luo Bearing behavior of high-performance concrete-filled high-strength steel tube composite columns subjected to eccentrical load Frontiers in Materials HCHST composite stub columns high-performance concrete high-strength steel eccentrical load bearing capacity |
| title | Bearing behavior of high-performance concrete-filled high-strength steel tube composite columns subjected to eccentrical load |
| title_full | Bearing behavior of high-performance concrete-filled high-strength steel tube composite columns subjected to eccentrical load |
| title_fullStr | Bearing behavior of high-performance concrete-filled high-strength steel tube composite columns subjected to eccentrical load |
| title_full_unstemmed | Bearing behavior of high-performance concrete-filled high-strength steel tube composite columns subjected to eccentrical load |
| title_short | Bearing behavior of high-performance concrete-filled high-strength steel tube composite columns subjected to eccentrical load |
| title_sort | bearing behavior of high performance concrete filled high strength steel tube composite columns subjected to eccentrical load |
| topic | HCHST composite stub columns high-performance concrete high-strength steel eccentrical load bearing capacity |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2022.972811/full |
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