Flexural Response of Axially Restricted RC Beams: Numerical and Theoretical Study
Reinforced concrete (RC) frame beams are subject to axial restriction at the ends, which plays an important role in the nonlinear behavior of these beams. This paper presents a numerical and theoretical investigation into the flexural behavior of RC beams axially restricted with external steel or fi...
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MDPI AG
2022-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/17/6052 |
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| author | Han Hu Sergio M. R. Lopes Adelino V. Lopes Tiejiong Lou |
| author_facet | Han Hu Sergio M. R. Lopes Adelino V. Lopes Tiejiong Lou |
| author_sort | Han Hu |
| collection | DOAJ |
| description | Reinforced concrete (RC) frame beams are subject to axial restriction at the ends, which plays an important role in the nonlinear behavior of these beams. This paper presents a numerical and theoretical investigation into the flexural behavior of RC beams axially restricted with external steel or fiber reinforced polymer (FRP) reinforcement. A numerical procedure for RC beams axially restricted with external reinforcement has been developed and it is verified against available experimental results. A numerical parametric study is then performed on axially restricted RC beams, focusing on the effect of type, area, and depth of external reinforcement. The results show that axial restriction increases the post-cracking stiffness and ultimate load-carrying capacity but reduces the flexural ductility. The ultimate stress in external reinforcement is substantially impacted by reinforcement type, area, and depth. A simplified model is developed to predict the ultimate load of RC beams axially restricted with external steel/FRP reinforcement. The predictions of the proposed simplified model agree favorably with the numerical results. The correlation coefficient for the ultimate load is 0.984, and the mean difference is −2.11% with a standard deviation of 3.62%. |
| first_indexed | 2024-03-10T01:36:03Z |
| format | Article |
| id | doaj.art-fac74886f3dd4a1c995ef67bde03fc64 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T01:36:03Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-fac74886f3dd4a1c995ef67bde03fc642023-11-23T13:34:43ZengMDPI AGMaterials1996-19442022-09-011517605210.3390/ma15176052Flexural Response of Axially Restricted RC Beams: Numerical and Theoretical StudyHan Hu0Sergio M. R. Lopes1Adelino V. Lopes2Tiejiong Lou3School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, ChinaCEMMPRE, Department of Civil Engineering, University of Coimbra, 3030-788 Coimbra, PortugalINESC, Department of Civil Engineering, University of Coimbra, 3030-788 Coimbra, PortugalSchool of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, ChinaReinforced concrete (RC) frame beams are subject to axial restriction at the ends, which plays an important role in the nonlinear behavior of these beams. This paper presents a numerical and theoretical investigation into the flexural behavior of RC beams axially restricted with external steel or fiber reinforced polymer (FRP) reinforcement. A numerical procedure for RC beams axially restricted with external reinforcement has been developed and it is verified against available experimental results. A numerical parametric study is then performed on axially restricted RC beams, focusing on the effect of type, area, and depth of external reinforcement. The results show that axial restriction increases the post-cracking stiffness and ultimate load-carrying capacity but reduces the flexural ductility. The ultimate stress in external reinforcement is substantially impacted by reinforcement type, area, and depth. A simplified model is developed to predict the ultimate load of RC beams axially restricted with external steel/FRP reinforcement. The predictions of the proposed simplified model agree favorably with the numerical results. The correlation coefficient for the ultimate load is 0.984, and the mean difference is −2.11% with a standard deviation of 3.62%.https://www.mdpi.com/1996-1944/15/17/6052flexural behavioraxial restrictionbeamnumerical analysis |
| spellingShingle | Han Hu Sergio M. R. Lopes Adelino V. Lopes Tiejiong Lou Flexural Response of Axially Restricted RC Beams: Numerical and Theoretical Study Materials flexural behavior axial restriction beam numerical analysis |
| title | Flexural Response of Axially Restricted RC Beams: Numerical and Theoretical Study |
| title_full | Flexural Response of Axially Restricted RC Beams: Numerical and Theoretical Study |
| title_fullStr | Flexural Response of Axially Restricted RC Beams: Numerical and Theoretical Study |
| title_full_unstemmed | Flexural Response of Axially Restricted RC Beams: Numerical and Theoretical Study |
| title_short | Flexural Response of Axially Restricted RC Beams: Numerical and Theoretical Study |
| title_sort | flexural response of axially restricted rc beams numerical and theoretical study |
| topic | flexural behavior axial restriction beam numerical analysis |
| url | https://www.mdpi.com/1996-1944/15/17/6052 |
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