Experiment and numerical analysis of prestressed unequal-walled rectangular concrete-filled steel box beams
Abstract When long-span beams undergo large, the strength of the beam material cannot be fully utilized. To solve this problem, a prestressed unequal-walled rectangular concrete-filled steel box (PURCFSB) beam is proposed in this paper. The prestressing is added to the concrete-filled steel tubular...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-84473-2 |
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| author | Qi Su Guangyuan Fu Jian Yang Siping Li |
| author_facet | Qi Su Guangyuan Fu Jian Yang Siping Li |
| author_sort | Qi Su |
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| description | Abstract When long-span beams undergo large, the strength of the beam material cannot be fully utilized. To solve this problem, a prestressed unequal-walled rectangular concrete-filled steel box (PURCFSB) beam is proposed in this paper. The prestressing is added to the concrete-filled steel tubular (CFST) beam and the section is designed. This beam is an improved concrete-filled steel tubular (CFST) beam with flanges of unequal thickness; the upper part of the steel box contains concrete, and the lower part is fitted with prestressed steel bars. Bending tests on ten PURCFSB beams with different concrete filling ratios and prestress levels revealed that prestressing can increase the yield bending moment and delay the cracking of concrete. The appropriate filling ratio can improve the structure’s yield moment and ultimate bearing capacity and reduce its self-weight while avoiding concrete cracking within the scope of work. Finite element analysis of the whole bending process of PURCFSB beams, carried out using ABAQUS software, yields results that are in good agreement with the experimental results. Parametric analysis (based on the validated finite element model) of the effects of the filling ratio and prestress level on the bending performance revealed that PURCFSB beams have good bearing capacity and deformation performance. |
| format | Article |
| id | doaj-art-f45cb7d6bd0540d2b524e42a971078f2 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
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| spelling | doaj-art-f45cb7d6bd0540d2b524e42a971078f22025-01-05T12:19:00ZengNature PortfolioScientific Reports2045-23222025-01-0115111510.1038/s41598-024-84473-2Experiment and numerical analysis of prestressed unequal-walled rectangular concrete-filled steel box beamsQi Su0Guangyuan Fu1Jian Yang2Siping Li3School of Naval Architecture Ocean & Civil Engineering, Shanghai Jiao Tong UniversitySchool of Naval Architecture Ocean & Civil Engineering, Shanghai Jiao Tong UniversitySchool of Naval Architecture Ocean & Civil Engineering, Shanghai Jiao Tong UniversitySchool of Naval Architecture Ocean & Civil Engineering, Shanghai Jiao Tong UniversityAbstract When long-span beams undergo large, the strength of the beam material cannot be fully utilized. To solve this problem, a prestressed unequal-walled rectangular concrete-filled steel box (PURCFSB) beam is proposed in this paper. The prestressing is added to the concrete-filled steel tubular (CFST) beam and the section is designed. This beam is an improved concrete-filled steel tubular (CFST) beam with flanges of unequal thickness; the upper part of the steel box contains concrete, and the lower part is fitted with prestressed steel bars. Bending tests on ten PURCFSB beams with different concrete filling ratios and prestress levels revealed that prestressing can increase the yield bending moment and delay the cracking of concrete. The appropriate filling ratio can improve the structure’s yield moment and ultimate bearing capacity and reduce its self-weight while avoiding concrete cracking within the scope of work. Finite element analysis of the whole bending process of PURCFSB beams, carried out using ABAQUS software, yields results that are in good agreement with the experimental results. Parametric analysis (based on the validated finite element model) of the effects of the filling ratio and prestress level on the bending performance revealed that PURCFSB beams have good bearing capacity and deformation performance.https://doi.org/10.1038/s41598-024-84473-2PrestressedPartially filledSteel box-concreteStatic testBending performance |
| spellingShingle | Qi Su Guangyuan Fu Jian Yang Siping Li Experiment and numerical analysis of prestressed unequal-walled rectangular concrete-filled steel box beams Scientific Reports Prestressed Partially filled Steel box-concrete Static test Bending performance |
| title | Experiment and numerical analysis of prestressed unequal-walled rectangular concrete-filled steel box beams |
| title_full | Experiment and numerical analysis of prestressed unequal-walled rectangular concrete-filled steel box beams |
| title_fullStr | Experiment and numerical analysis of prestressed unequal-walled rectangular concrete-filled steel box beams |
| title_full_unstemmed | Experiment and numerical analysis of prestressed unequal-walled rectangular concrete-filled steel box beams |
| title_short | Experiment and numerical analysis of prestressed unequal-walled rectangular concrete-filled steel box beams |
| title_sort | experiment and numerical analysis of prestressed unequal walled rectangular concrete filled steel box beams |
| topic | Prestressed Partially filled Steel box-concrete Static test Bending performance |
| url | https://doi.org/10.1038/s41598-024-84473-2 |
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