Shear strengthening of full-scale RC beams with externally bonded ultra-high performance concrete (UHPC) plates with embedded CFRP strips
This study investigates experimentally the shear behavior of reinforced concrete (RC) beams strengthened with ultra-high performance concrete (UHPC) plates and carbon fiber-reinforced polymer (CFRP) strips. Six full-scale RC beams, including one control specimen and five strengthened with UHPC plate...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525006497 |
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| author | Guolin Wang Lei Gu Jingjiao Nie Tao Qu Chang Wu Yuxuan Zhang Jialin Yang |
| author_facet | Guolin Wang Lei Gu Jingjiao Nie Tao Qu Chang Wu Yuxuan Zhang Jialin Yang |
| author_sort | Guolin Wang |
| collection | DOAJ |
| description | This study investigates experimentally the shear behavior of reinforced concrete (RC) beams strengthened with ultra-high performance concrete (UHPC) plates and carbon fiber-reinforced polymer (CFRP) strips. Six full-scale RC beams, including one control specimen and five strengthened with UHPC plates (with/without embedded CFRP strips), were tested to evaluate the contributions of UHPC plates and CFRP strips. Experimental results demonstrated that all beams failed in shear. Compared to the control beam, the strengthened beams exhibited significant improvements in shear capacity (with a 16.5–31.9 % increase), stiffness, and ductility. The embedded CFRP strips further enhanced cracking resistance of UHPC plates. Experimental findings also revealed that the composite action between UHPC plates and RC beams relies on the bond strength of the adhesive layer and the anchorage constraint of bolts. During the early stages of loading, the structural adhesive plays a dominant role, while in later stages, the bolts dominate, not only providing lateral restraint but also acting as shear connectors to mitigate possible slippage between the beam and the UHPC plate. These findings provide practical guidance for shear strengthening of RC beams with UHPC plates. |
| format | Article |
| id | doaj-art-1b3d51cbea8a42ffbb0d8deaae929908 |
| institution | OA Journals |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-1b3d51cbea8a42ffbb0d8deaae9299082025-08-20T02:00:54ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e0485110.1016/j.cscm.2025.e04851Shear strengthening of full-scale RC beams with externally bonded ultra-high performance concrete (UHPC) plates with embedded CFRP stripsGuolin Wang0Lei Gu1Jingjiao Nie2Tao Qu3Chang Wu4Yuxuan Zhang5Jialin Yang6School of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, China; Shanghai Key Laboratory of Engineering Structure Safety, SRIBS, Shanghai 200032, ChinaSchool of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaSchool of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaKey Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, China; School of Civil Engineering, Southeast University, Nanjing, ChinaKey Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, China; School of Civil Engineering, Southeast University, Nanjing, China; Corresponding author at: Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, China.School of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaSchool of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaThis study investigates experimentally the shear behavior of reinforced concrete (RC) beams strengthened with ultra-high performance concrete (UHPC) plates and carbon fiber-reinforced polymer (CFRP) strips. Six full-scale RC beams, including one control specimen and five strengthened with UHPC plates (with/without embedded CFRP strips), were tested to evaluate the contributions of UHPC plates and CFRP strips. Experimental results demonstrated that all beams failed in shear. Compared to the control beam, the strengthened beams exhibited significant improvements in shear capacity (with a 16.5–31.9 % increase), stiffness, and ductility. The embedded CFRP strips further enhanced cracking resistance of UHPC plates. Experimental findings also revealed that the composite action between UHPC plates and RC beams relies on the bond strength of the adhesive layer and the anchorage constraint of bolts. During the early stages of loading, the structural adhesive plays a dominant role, while in later stages, the bolts dominate, not only providing lateral restraint but also acting as shear connectors to mitigate possible slippage between the beam and the UHPC plate. These findings provide practical guidance for shear strengthening of RC beams with UHPC plates.http://www.sciencedirect.com/science/article/pii/S2214509525006497Reinforced concrete beamUltra-high performance concreteCFRP stripShear strengtheningInterfacial bond strength |
| spellingShingle | Guolin Wang Lei Gu Jingjiao Nie Tao Qu Chang Wu Yuxuan Zhang Jialin Yang Shear strengthening of full-scale RC beams with externally bonded ultra-high performance concrete (UHPC) plates with embedded CFRP strips Case Studies in Construction Materials Reinforced concrete beam Ultra-high performance concrete CFRP strip Shear strengthening Interfacial bond strength |
| title | Shear strengthening of full-scale RC beams with externally bonded ultra-high performance concrete (UHPC) plates with embedded CFRP strips |
| title_full | Shear strengthening of full-scale RC beams with externally bonded ultra-high performance concrete (UHPC) plates with embedded CFRP strips |
| title_fullStr | Shear strengthening of full-scale RC beams with externally bonded ultra-high performance concrete (UHPC) plates with embedded CFRP strips |
| title_full_unstemmed | Shear strengthening of full-scale RC beams with externally bonded ultra-high performance concrete (UHPC) plates with embedded CFRP strips |
| title_short | Shear strengthening of full-scale RC beams with externally bonded ultra-high performance concrete (UHPC) plates with embedded CFRP strips |
| title_sort | shear strengthening of full scale rc beams with externally bonded ultra high performance concrete uhpc plates with embedded cfrp strips |
| topic | Reinforced concrete beam Ultra-high performance concrete CFRP strip Shear strengthening Interfacial bond strength |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525006497 |
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