Repeated axial compressive performance of GCFST columns: Test investigation and numerical analysis
Abstract Geopolymer concrete (GC) is green and environmentally friendly. In order to comprehensively study the mechanical properties and influence mechanism of geopolymer concrete-filled steel tubular (GCFST) columns under various working conditions, this study takes the strength grade of geopolymer...
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| Format: | Article |
| Language: | English |
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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/s41598-025-86516-8 |
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| author | Cun Hui Jianwei Zhang Yun Cao Xiang Chen Ran Hai |
| author_facet | Cun Hui Jianwei Zhang Yun Cao Xiang Chen Ran Hai |
| author_sort | Cun Hui |
| collection | DOAJ |
| description | Abstract Geopolymer concrete (GC) is green and environmentally friendly. In order to comprehensively study the mechanical properties and influence mechanism of geopolymer concrete-filled steel tubular (GCFST) columns under various working conditions, this study takes the strength grade of geopolymer concrete, length-diameter ratio and wall thickness of steel tube as design parameters. Eight GCFST columns are designed and the compressive performances are conducted under repeated axial compression. The load–displacement curve, the skeleton curve, the characteristic load and displacement, the ductility, and the energy dissipation were analyzed. Furthermore, the numerical analysis models were established through finite element software and the test results were compared with the simulation results to verify the accuracy of the finite element model. The results indicate that under different length-diameter ratios, the variation trends of the load–displacement curves for the specimens are slightly different, while the stiffness degradation curves present similar variation laws. The design parameters have significant effects on the bearing capacity, average compressive force, and energy dissipating capacity of the specimens. The simulation results are in good agreement with the experimental results. Research results show the excellent bearing capacity of GCFST columns and the precision of finite element calculation results, which can provide a reference for related experimental research. |
| format | Article |
| id | doaj-art-7a6d9ffe1dfb4623aad61c2740c2f2cd |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-7a6d9ffe1dfb4623aad61c2740c2f2cd2025-01-26T12:29:19ZengNature PortfolioScientific Reports2045-23222025-01-0115111210.1038/s41598-025-86516-8Repeated axial compressive performance of GCFST columns: Test investigation and numerical analysisCun Hui0Jianwei Zhang1Yun Cao2Xiang Chen3Ran Hai4School of Intelligent Construction and Civil Engineering, Zhongyuan University of TechnologySchool of Civil Engineering, Beijing University of TechnologySchool of Intelligent Construction and Civil Engineering, Zhongyuan University of TechnologySchool of Intelligent Construction and Civil Engineering, Zhongyuan University of TechnologySchool of Materials Science and Engineering, Henan University of Science and TechnologyAbstract Geopolymer concrete (GC) is green and environmentally friendly. In order to comprehensively study the mechanical properties and influence mechanism of geopolymer concrete-filled steel tubular (GCFST) columns under various working conditions, this study takes the strength grade of geopolymer concrete, length-diameter ratio and wall thickness of steel tube as design parameters. Eight GCFST columns are designed and the compressive performances are conducted under repeated axial compression. The load–displacement curve, the skeleton curve, the characteristic load and displacement, the ductility, and the energy dissipation were analyzed. Furthermore, the numerical analysis models were established through finite element software and the test results were compared with the simulation results to verify the accuracy of the finite element model. The results indicate that under different length-diameter ratios, the variation trends of the load–displacement curves for the specimens are slightly different, while the stiffness degradation curves present similar variation laws. The design parameters have significant effects on the bearing capacity, average compressive force, and energy dissipating capacity of the specimens. The simulation results are in good agreement with the experimental results. Research results show the excellent bearing capacity of GCFST columns and the precision of finite element calculation results, which can provide a reference for related experimental research.https://doi.org/10.1038/s41598-025-86516-8Geopolymer concrete filled steel tubular columnRepeated axial compression testFailure modeStructural behaviorFinite element simulation |
| spellingShingle | Cun Hui Jianwei Zhang Yun Cao Xiang Chen Ran Hai Repeated axial compressive performance of GCFST columns: Test investigation and numerical analysis Scientific Reports Geopolymer concrete filled steel tubular column Repeated axial compression test Failure mode Structural behavior Finite element simulation |
| title | Repeated axial compressive performance of GCFST columns: Test investigation and numerical analysis |
| title_full | Repeated axial compressive performance of GCFST columns: Test investigation and numerical analysis |
| title_fullStr | Repeated axial compressive performance of GCFST columns: Test investigation and numerical analysis |
| title_full_unstemmed | Repeated axial compressive performance of GCFST columns: Test investigation and numerical analysis |
| title_short | Repeated axial compressive performance of GCFST columns: Test investigation and numerical analysis |
| title_sort | repeated axial compressive performance of gcfst columns test investigation and numerical analysis |
| topic | Geopolymer concrete filled steel tubular column Repeated axial compression test Failure mode Structural behavior Finite element simulation |
| url | https://doi.org/10.1038/s41598-025-86516-8 |
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