Research on the Shear Performance of Concrete Beams Strengthened with Lateral External Prestressing
Urban renewal and improving the structural resilience of infrastructure are the hotspots of attention in all walks of life. The structural resilience of existing infrastructure and engineering structures is deteriorating with the increase in service life. In order to quickly improve the structural r...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
|
| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/15/9/1482 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849312895767150592 |
|---|---|
| author | Zhenhua Ren Yuzhu Wang Wei Chen Xiantao Zeng Xuanming Ding |
| author_facet | Zhenhua Ren Yuzhu Wang Wei Chen Xiantao Zeng Xuanming Ding |
| author_sort | Zhenhua Ren |
| collection | DOAJ |
| description | Urban renewal and improving the structural resilience of infrastructure are the hotspots of attention in all walks of life. The structural resilience of existing infrastructure and engineering structures is deteriorating with the increase in service life. In order to quickly improve the structural resilience and service life of existing engineering structures, a new method of rapid reinforcement for in-service concrete beams is proposed in this paper, which is the external prestressed reinforcement method of the side façade. The specific procedure involves creating a penetration hole at each end of the side surface of the concrete beam, inserting a prestressed support rod into the hole and subsequently installing a prestressed long bolt within the support rod. External prestress is applied to the side façade of the concrete beam through prestressed bolts. A total of 21 reinforced concrete beams were designed and manufactured, including 3 contrast beams of ordinary concrete, 9 concrete beams reinforced with traditional external prestressing steel and 9 concrete beams reinforced with externally prestressed steel on side façades. Different initial prestressing forces were applied to the reinforced beams, and flexural shear tests and numerical analyses were carried out on the concrete beams. The failure modes and shear resistances were analyzed. This research demonstrates that, in comparison with the control beam, the ultimate bearing capacity of the traditionally externally prestressed concrete beams increased by 137.8% to 140.8%, depending on the initial prestress difference. For the externally prestressed concrete beams applied to the side façade, these increases range from 42.6% to 52.0%. Furthermore, the cracking load and yield load of the reinforced concrete beams are significantly enhanced, thereby improving their operational performance. Additionally, the numerical results confirm that the theoretical calculations align well with the experimental findings. |
| format | Article |
| id | doaj-art-87a4178f35ea4ba8ade949f1d3ff7f56 |
| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-87a4178f35ea4ba8ade949f1d3ff7f562025-08-20T03:52:56ZengMDPI AGBuildings2075-53092025-04-01159148210.3390/buildings15091482Research on the Shear Performance of Concrete Beams Strengthened with Lateral External PrestressingZhenhua Ren0Yuzhu Wang1Wei Chen2Xiantao Zeng3Xuanming Ding4Hunan Provincial Key Laboratory of Intelligent Disaster Prevention–Mitigation and Ecological Restoration in Civil Engineering, Hunan Institute of Engineering, Xiangtan 411104, ChinaHunan Provincial Key Laboratory of Intelligent Disaster Prevention–Mitigation and Ecological Restoration in Civil Engineering, Hunan Institute of Engineering, Xiangtan 411104, ChinaHunan Provincial Key Laboratory of Intelligent Disaster Prevention–Mitigation and Ecological Restoration in Civil Engineering, Hunan Institute of Engineering, Xiangtan 411104, ChinaHunan Provincial Key Laboratory of Intelligent Disaster Prevention–Mitigation and Ecological Restoration in Civil Engineering, Hunan Institute of Engineering, Xiangtan 411104, ChinaCollege of Civil Engineering, Chongqing University, Chongqing 400045, ChinaUrban renewal and improving the structural resilience of infrastructure are the hotspots of attention in all walks of life. The structural resilience of existing infrastructure and engineering structures is deteriorating with the increase in service life. In order to quickly improve the structural resilience and service life of existing engineering structures, a new method of rapid reinforcement for in-service concrete beams is proposed in this paper, which is the external prestressed reinforcement method of the side façade. The specific procedure involves creating a penetration hole at each end of the side surface of the concrete beam, inserting a prestressed support rod into the hole and subsequently installing a prestressed long bolt within the support rod. External prestress is applied to the side façade of the concrete beam through prestressed bolts. A total of 21 reinforced concrete beams were designed and manufactured, including 3 contrast beams of ordinary concrete, 9 concrete beams reinforced with traditional external prestressing steel and 9 concrete beams reinforced with externally prestressed steel on side façades. Different initial prestressing forces were applied to the reinforced beams, and flexural shear tests and numerical analyses were carried out on the concrete beams. The failure modes and shear resistances were analyzed. This research demonstrates that, in comparison with the control beam, the ultimate bearing capacity of the traditionally externally prestressed concrete beams increased by 137.8% to 140.8%, depending on the initial prestress difference. For the externally prestressed concrete beams applied to the side façade, these increases range from 42.6% to 52.0%. Furthermore, the cracking load and yield load of the reinforced concrete beams are significantly enhanced, thereby improving their operational performance. Additionally, the numerical results confirm that the theoretical calculations align well with the experimental findings.https://www.mdpi.com/2075-5309/15/9/1482external prestressing of side façadestrengtheningconcrete beamshear resistanceABAQUS finite element analysis |
| spellingShingle | Zhenhua Ren Yuzhu Wang Wei Chen Xiantao Zeng Xuanming Ding Research on the Shear Performance of Concrete Beams Strengthened with Lateral External Prestressing Buildings external prestressing of side façade strengthening concrete beam shear resistance ABAQUS finite element analysis |
| title | Research on the Shear Performance of Concrete Beams Strengthened with Lateral External Prestressing |
| title_full | Research on the Shear Performance of Concrete Beams Strengthened with Lateral External Prestressing |
| title_fullStr | Research on the Shear Performance of Concrete Beams Strengthened with Lateral External Prestressing |
| title_full_unstemmed | Research on the Shear Performance of Concrete Beams Strengthened with Lateral External Prestressing |
| title_short | Research on the Shear Performance of Concrete Beams Strengthened with Lateral External Prestressing |
| title_sort | research on the shear performance of concrete beams strengthened with lateral external prestressing |
| topic | external prestressing of side façade strengthening concrete beam shear resistance ABAQUS finite element analysis |
| url | https://www.mdpi.com/2075-5309/15/9/1482 |
| work_keys_str_mv | AT zhenhuaren researchontheshearperformanceofconcretebeamsstrengthenedwithlateralexternalprestressing AT yuzhuwang researchontheshearperformanceofconcretebeamsstrengthenedwithlateralexternalprestressing AT weichen researchontheshearperformanceofconcretebeamsstrengthenedwithlateralexternalprestressing AT xiantaozeng researchontheshearperformanceofconcretebeamsstrengthenedwithlateralexternalprestressing AT xuanmingding researchontheshearperformanceofconcretebeamsstrengthenedwithlateralexternalprestressing |