Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression
This study bridges the knowledge gap regarding the eccentric compression behavior of circular ultra-high-strength concrete filled high-strength steel tube (CuFShT) columns. Tests on 12 medium-length CuFShT specimens with varying steel contents and load eccentricities revealed their failure modes, lo...
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| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525005601 |
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| author | Xia Luo Xinye Yu Jiangang Wei Chenchen Jiang Yan Yang |
| author_facet | Xia Luo Xinye Yu Jiangang Wei Chenchen Jiang Yan Yang |
| author_sort | Xia Luo |
| collection | DOAJ |
| description | This study bridges the knowledge gap regarding the eccentric compression behavior of circular ultra-high-strength concrete filled high-strength steel tube (CuFShT) columns. Tests on 12 medium-length CuFShT specimens with varying steel contents and load eccentricities revealed their failure modes, load-deflection responses, and steel strains. Finite element models were developed to analyze the effects of load eccentricity, slenderness ratio, and cross-sectional parameters on the ultimate load-bearing capacity. Calculation methods for the ultimate capacity, including an evaluation of existing design codes, are discussed, and an explicit method for engineering applications is proposed. The results show that an increased steel content enhances the flexural stiffness and load-bearing capacity, whereas a higher eccentricity significantly reduces the load-bearing capacity. The combined influence of the eccentricity and slenderness ratio suggests the need for an overall reduction factor in the design calculations. After normalizing the slenderness, the cross-sectional parameters showed a minimal impact. Among the existing design codes, including AISC 360–16, AIJ-2008, and T/CECS 987–2021, the European standard EN 1994–1–1 provides the most accurate predictions for CuFShT columns. By incorporating the Perry-Robertson formula, the coupled effects of the eccentricity and slenderness ratio were effectively captured, enabling a precise estimation of the ultimate load-bearing capacity for eccentrically-compressed CuFShT columns using the explicit calculation formula. |
| format | Article |
| id | doaj-art-42b8e3f78a854ea7934a2a6b39a2e733 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
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| series | Case Studies in Construction Materials |
| spelling | doaj-art-42b8e3f78a854ea7934a2a6b39a2e7332025-08-20T03:49:32ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e0476210.1016/j.cscm.2025.e04762Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compressionXia Luo0Xinye Yu1Jiangang Wei2Chenchen Jiang3Yan Yang4School of Civil Engineering, Fujian University of Technology, Fujian 350118, ChinaSchool of Civil Engineering, Fujian University of Technology, Fujian 350118, ChinaSchool of Civil Engineering, Fujian University of Technology, Fujian 350118, China; College of Civil Engineering, Fuzhou University, Fujian 350108, China; Corresponding author at: School of Civil Engineering, Fujian University of Technology, Fujian 350118, China.College of Civil Engineering, Fuzhou University, Fujian 350108, ChinaCollege of Civil Engineering, Fuzhou University, Fujian 350108, ChinaThis study bridges the knowledge gap regarding the eccentric compression behavior of circular ultra-high-strength concrete filled high-strength steel tube (CuFShT) columns. Tests on 12 medium-length CuFShT specimens with varying steel contents and load eccentricities revealed their failure modes, load-deflection responses, and steel strains. Finite element models were developed to analyze the effects of load eccentricity, slenderness ratio, and cross-sectional parameters on the ultimate load-bearing capacity. Calculation methods for the ultimate capacity, including an evaluation of existing design codes, are discussed, and an explicit method for engineering applications is proposed. The results show that an increased steel content enhances the flexural stiffness and load-bearing capacity, whereas a higher eccentricity significantly reduces the load-bearing capacity. The combined influence of the eccentricity and slenderness ratio suggests the need for an overall reduction factor in the design calculations. After normalizing the slenderness, the cross-sectional parameters showed a minimal impact. Among the existing design codes, including AISC 360–16, AIJ-2008, and T/CECS 987–2021, the European standard EN 1994–1–1 provides the most accurate predictions for CuFShT columns. By incorporating the Perry-Robertson formula, the coupled effects of the eccentricity and slenderness ratio were effectively captured, enabling a precise estimation of the ultimate load-bearing capacity for eccentrically-compressed CuFShT columns using the explicit calculation formula.http://www.sciencedirect.com/science/article/pii/S2214509525005601Concrete filled steel tubeHigh strengthEccentric compressionSlender columnBearing capacity |
| spellingShingle | Xia Luo Xinye Yu Jiangang Wei Chenchen Jiang Yan Yang Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression Case Studies in Construction Materials Concrete filled steel tube High strength Eccentric compression Slender column Bearing capacity |
| title | Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression |
| title_full | Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression |
| title_fullStr | Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression |
| title_full_unstemmed | Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression |
| title_short | Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression |
| title_sort | mechanical response of slender ultra high strength concrete filled high strength steel tube columns under eccentric compression |
| topic | Concrete filled steel tube High strength Eccentric compression Slender column Bearing capacity |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525005601 |
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