Study on the Bending Performance of High-Strength and High-Ductility CRE-Reinforced Concrete Beams
Constant resistance energy (CRE) steel reinforcement has a yield strength of up to 750 MPa and an ultimate elongation of more than 20%. CRE reinforcement overcomes the contradiction between high yield strength and high uniform elongation of ordinary high-strength bars. This paper explores the flexur...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/11/2746 |
| _version_ | 1797459889082073088 |
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| author | Xiao Zhang Youkun Sun Xiaoxia Yang Lele Sun Peijun Wang |
| author_facet | Xiao Zhang Youkun Sun Xiaoxia Yang Lele Sun Peijun Wang |
| author_sort | Xiao Zhang |
| collection | DOAJ |
| description | Constant resistance energy (CRE) steel reinforcement has a yield strength of up to 750 MPa and an ultimate elongation of more than 20%. CRE reinforcement overcomes the contradiction between high yield strength and high uniform elongation of ordinary high-strength bars. This paper explores the flexural performance and load-carrying mechanisms of CRE-reinforced concrete beams through a series of experiments, while also presenting a theoretical analytical method for such specimens. Flexural tests on six CRE-reinforced concrete beams and two control tests on hot-rolled ribbed bar 400 (HRB400)-reinforced concrete beams were conducted in this paper. The study examines the influence of the shear–span ratio and reinforcement type on the mechanical response of the beams, including cracking load, yield load, and ultimate load, while analyzing the variation patterns of concrete strain and reinforcement strain. The experimental results demonstrate that as the shear–span ratio decreases, the crack resistance and load-carrying capacity of CRE-reinforced concrete beams improve. Under equivalent conditions, CRE-reinforced concrete beams exhibit higher load-carrying capacity compared to HRB-reinforced concrete beams, surpassing the latter by approximately 43% in terms of ultimate load. Additionally, this paper proposes a calculation method for the mechanical response of NPR-reinforced concrete beams and compares the theoretical values with the experimental values. The differences between the two are within 13%, which proves the reliability of the calculation method. |
| first_indexed | 2024-03-09T16:57:22Z |
| format | Article |
| id | doaj.art-20ae8ae120c14b628ea7d498cf43d462 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T16:57:22Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-20ae8ae120c14b628ea7d498cf43d4622023-11-24T14:33:13ZengMDPI AGBuildings2075-53092023-10-011311274610.3390/buildings13112746Study on the Bending Performance of High-Strength and High-Ductility CRE-Reinforced Concrete BeamsXiao Zhang0Youkun Sun1Xiaoxia Yang2Lele Sun3Peijun Wang4School of Qilu Transportation, Shandong University, Jinan 256001, ChinaSchool of Civil Engineering, Shandong University, Jinan 256001, ChinaSchool of Civil Engineering, Shandong University, Jinan 256001, ChinaSchool of Civil Engineering, Shandong University, Jinan 256001, ChinaSchool of Civil Engineering, Shandong University, Jinan 256001, ChinaConstant resistance energy (CRE) steel reinforcement has a yield strength of up to 750 MPa and an ultimate elongation of more than 20%. CRE reinforcement overcomes the contradiction between high yield strength and high uniform elongation of ordinary high-strength bars. This paper explores the flexural performance and load-carrying mechanisms of CRE-reinforced concrete beams through a series of experiments, while also presenting a theoretical analytical method for such specimens. Flexural tests on six CRE-reinforced concrete beams and two control tests on hot-rolled ribbed bar 400 (HRB400)-reinforced concrete beams were conducted in this paper. The study examines the influence of the shear–span ratio and reinforcement type on the mechanical response of the beams, including cracking load, yield load, and ultimate load, while analyzing the variation patterns of concrete strain and reinforcement strain. The experimental results demonstrate that as the shear–span ratio decreases, the crack resistance and load-carrying capacity of CRE-reinforced concrete beams improve. Under equivalent conditions, CRE-reinforced concrete beams exhibit higher load-carrying capacity compared to HRB-reinforced concrete beams, surpassing the latter by approximately 43% in terms of ultimate load. Additionally, this paper proposes a calculation method for the mechanical response of NPR-reinforced concrete beams and compares the theoretical values with the experimental values. The differences between the two are within 13%, which proves the reliability of the calculation method.https://www.mdpi.com/2075-5309/13/11/2746steel-reinforced concrete beamhigh-strength steel reinforcementflexural performanceshear–span ratiocalculation method |
| spellingShingle | Xiao Zhang Youkun Sun Xiaoxia Yang Lele Sun Peijun Wang Study on the Bending Performance of High-Strength and High-Ductility CRE-Reinforced Concrete Beams Buildings steel-reinforced concrete beam high-strength steel reinforcement flexural performance shear–span ratio calculation method |
| title | Study on the Bending Performance of High-Strength and High-Ductility CRE-Reinforced Concrete Beams |
| title_full | Study on the Bending Performance of High-Strength and High-Ductility CRE-Reinforced Concrete Beams |
| title_fullStr | Study on the Bending Performance of High-Strength and High-Ductility CRE-Reinforced Concrete Beams |
| title_full_unstemmed | Study on the Bending Performance of High-Strength and High-Ductility CRE-Reinforced Concrete Beams |
| title_short | Study on the Bending Performance of High-Strength and High-Ductility CRE-Reinforced Concrete Beams |
| title_sort | study on the bending performance of high strength and high ductility cre reinforced concrete beams |
| topic | steel-reinforced concrete beam high-strength steel reinforcement flexural performance shear–span ratio calculation method |
| url | https://www.mdpi.com/2075-5309/13/11/2746 |
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