The Restraint Mechanism of High-Strength Rectangular Spiral Stirrup Confined Fiber Reinforced Concrete
To reveal the confinement mechanism of high-strength rectangular spiral stirrups (HRSSs) on fiber-reinforced concrete, this study designed and conducted axial compression tests on 20 HRSS-confined fiber-reinforced concrete columns. The effects of stirrup spacing, stirrup strength, and concrete stren...
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MDPI AG
2025-04-01
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| author | Pengyu Fan Huajing Zhao Weitong Liu |
| author_facet | Pengyu Fan Huajing Zhao Weitong Liu |
| author_sort | Pengyu Fan |
| collection | DOAJ |
| description | To reveal the confinement mechanism of high-strength rectangular spiral stirrups (HRSSs) on fiber-reinforced concrete, this study designed and conducted axial compression tests on 20 HRSS-confined fiber-reinforced concrete columns. The effects of stirrup spacing, stirrup strength, and concrete strength on the strength and ductility of the columns were analyzed. The experimental results demonstrate that HRSS can significantly improve the performance of fiber-reinforced concrete. The peak strength of concrete exhibited a maximum increase of 2.033 times, and the ductility ratio achieved a maximum increase of 2.588 times. Furthermore, the application of densely spaced high-strength spiral hoops to confine the core concrete not only effectively enhances its compressive strength but also markedly improves its deformability. Based on the stress distribution across the cross-section of HRSS-confined fiber-reinforced concrete columns, this paper proposes a method for delineating the effective confinement area, establishes calculation models for effective lateral confinement stress, effective confinement coefficient, peak stress, and peak strain, and develops a stress-strain constitutive relationship suitable for HRSS-confined fiber-reinforced concrete columns. |
| format | Article |
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| institution | DOAJ |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-04-01 |
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| spelling | doaj-art-69da36bd96fc49fbaaab9bfef6d806592025-08-20T03:14:18ZengMDPI AGBuildings2075-53092025-04-01158134510.3390/buildings15081345The Restraint Mechanism of High-Strength Rectangular Spiral Stirrup Confined Fiber Reinforced ConcretePengyu Fan0Huajing Zhao1Weitong Liu2College of Science, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaCollege of Science, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaCollege of Science, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaTo reveal the confinement mechanism of high-strength rectangular spiral stirrups (HRSSs) on fiber-reinforced concrete, this study designed and conducted axial compression tests on 20 HRSS-confined fiber-reinforced concrete columns. The effects of stirrup spacing, stirrup strength, and concrete strength on the strength and ductility of the columns were analyzed. The experimental results demonstrate that HRSS can significantly improve the performance of fiber-reinforced concrete. The peak strength of concrete exhibited a maximum increase of 2.033 times, and the ductility ratio achieved a maximum increase of 2.588 times. Furthermore, the application of densely spaced high-strength spiral hoops to confine the core concrete not only effectively enhances its compressive strength but also markedly improves its deformability. Based on the stress distribution across the cross-section of HRSS-confined fiber-reinforced concrete columns, this paper proposes a method for delineating the effective confinement area, establishes calculation models for effective lateral confinement stress, effective confinement coefficient, peak stress, and peak strain, and develops a stress-strain constitutive relationship suitable for HRSS-confined fiber-reinforced concrete columns.https://www.mdpi.com/2075-5309/15/8/1345high-strength rectangular spiral stirrupsaxial compression testslateral confinement stresseffective confinement coefficientstress-strain constitutive relationship |
| spellingShingle | Pengyu Fan Huajing Zhao Weitong Liu The Restraint Mechanism of High-Strength Rectangular Spiral Stirrup Confined Fiber Reinforced Concrete Buildings high-strength rectangular spiral stirrups axial compression tests lateral confinement stress effective confinement coefficient stress-strain constitutive relationship |
| title | The Restraint Mechanism of High-Strength Rectangular Spiral Stirrup Confined Fiber Reinforced Concrete |
| title_full | The Restraint Mechanism of High-Strength Rectangular Spiral Stirrup Confined Fiber Reinforced Concrete |
| title_fullStr | The Restraint Mechanism of High-Strength Rectangular Spiral Stirrup Confined Fiber Reinforced Concrete |
| title_full_unstemmed | The Restraint Mechanism of High-Strength Rectangular Spiral Stirrup Confined Fiber Reinforced Concrete |
| title_short | The Restraint Mechanism of High-Strength Rectangular Spiral Stirrup Confined Fiber Reinforced Concrete |
| title_sort | restraint mechanism of high strength rectangular spiral stirrup confined fiber reinforced concrete |
| topic | high-strength rectangular spiral stirrups axial compression tests lateral confinement stress effective confinement coefficient stress-strain constitutive relationship |
| url | https://www.mdpi.com/2075-5309/15/8/1345 |
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