Experimental study on the residual interfacial bonding performance between CFRPs and concrete after high temperatures
Abstract Carbon fibre reinforced polymer (CFRP) are widely used in bridge reinforcement projects. However, delamination at the CFRP-concrete interface caused by frequent fires significantly impacts structural safety, severely restricting the further and extensive development of CFRP in bridge engine...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-06-01
|
| Series: | Advances in Bridge Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s43251-025-00168-2 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849469863497564160 |
|---|---|
| author | Yushi Yin Qinhua Yang Zhihui Zhang Haiyang Luan Chen Li |
| author_facet | Yushi Yin Qinhua Yang Zhihui Zhang Haiyang Luan Chen Li |
| author_sort | Yushi Yin |
| collection | DOAJ |
| description | Abstract Carbon fibre reinforced polymer (CFRP) are widely used in bridge reinforcement projects. However, delamination at the CFRP-concrete interface caused by frequent fires significantly impacts structural safety, severely restricting the further and extensive development of CFRP in bridge engineering. In this paper, the sand filling method is used to quantitatively evaluate the roughness of the concrete beam's surface, and the interfacial normal and tangential bonding stresses between CFRPs and concrete after exposure to elevated temperatures were investigated. The strength grade of the concrete, concrete surface roughness and temperature were analysed to explore the behaviour of the CFRP composites. First, before the CFRP sheets were pasted, the concrete interfacial roughness was quantitatively evaluated, and 135 CFRP-concrete interfacial bonding tests were carried out. Then, two bonding models based on an elevated temperature field were proposed. Finally, the interfacial bonding failure mechanism was analysed by scanning electron microscope (SEM). The research results showed that the concrete surface roughness more significantly affects the interfacial bonding stress than does the strength grade of the concrete. The interfacial separation between CFRPs and epoxy resin occurs at 110 °C, and the glass transition temperature (Tg) is the critical factor determining the decrease in the bonding performance of CFRP composites. The two models proposed in this study exhibit high prediction accuracy and certain safety reserves and are applicable to the prediction of CFRP reinforcement design and construction after exposure to high temperatures. These models also have additional potential applications. |
| format | Article |
| id | doaj-art-83f84ee1daae4ff29d0719929e0636ec |
| institution | Kabale University |
| issn | 2662-5407 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Advances in Bridge Engineering |
| spelling | doaj-art-83f84ee1daae4ff29d0719929e0636ec2025-08-20T03:25:19ZengSpringerOpenAdvances in Bridge Engineering2662-54072025-06-016112210.1186/s43251-025-00168-2Experimental study on the residual interfacial bonding performance between CFRPs and concrete after high temperaturesYushi Yin0Qinhua Yang1Zhihui Zhang2Haiyang Luan3Chen Li4College of Architectural Engineering, Yangzhou Polytechnic InstituteSchool of Mechanics and Engineering, Liaoning Technical UniversitySchool of Mechanics and Engineering, Liaoning Technical UniversitySchool of Transportation Engineering, Dalian Jiaotong UniversityCollege of Architectural Engineering, Yangzhou Polytechnic InstituteAbstract Carbon fibre reinforced polymer (CFRP) are widely used in bridge reinforcement projects. However, delamination at the CFRP-concrete interface caused by frequent fires significantly impacts structural safety, severely restricting the further and extensive development of CFRP in bridge engineering. In this paper, the sand filling method is used to quantitatively evaluate the roughness of the concrete beam's surface, and the interfacial normal and tangential bonding stresses between CFRPs and concrete after exposure to elevated temperatures were investigated. The strength grade of the concrete, concrete surface roughness and temperature were analysed to explore the behaviour of the CFRP composites. First, before the CFRP sheets were pasted, the concrete interfacial roughness was quantitatively evaluated, and 135 CFRP-concrete interfacial bonding tests were carried out. Then, two bonding models based on an elevated temperature field were proposed. Finally, the interfacial bonding failure mechanism was analysed by scanning electron microscope (SEM). The research results showed that the concrete surface roughness more significantly affects the interfacial bonding stress than does the strength grade of the concrete. The interfacial separation between CFRPs and epoxy resin occurs at 110 °C, and the glass transition temperature (Tg) is the critical factor determining the decrease in the bonding performance of CFRP composites. The two models proposed in this study exhibit high prediction accuracy and certain safety reserves and are applicable to the prediction of CFRP reinforcement design and construction after exposure to high temperatures. These models also have additional potential applications.https://doi.org/10.1186/s43251-025-00168-2Bridge engineeringFireElevated temperatureCFRPConcreteEpoxy resin |
| spellingShingle | Yushi Yin Qinhua Yang Zhihui Zhang Haiyang Luan Chen Li Experimental study on the residual interfacial bonding performance between CFRPs and concrete after high temperatures Advances in Bridge Engineering Bridge engineering Fire Elevated temperature CFRP Concrete Epoxy resin |
| title | Experimental study on the residual interfacial bonding performance between CFRPs and concrete after high temperatures |
| title_full | Experimental study on the residual interfacial bonding performance between CFRPs and concrete after high temperatures |
| title_fullStr | Experimental study on the residual interfacial bonding performance between CFRPs and concrete after high temperatures |
| title_full_unstemmed | Experimental study on the residual interfacial bonding performance between CFRPs and concrete after high temperatures |
| title_short | Experimental study on the residual interfacial bonding performance between CFRPs and concrete after high temperatures |
| title_sort | experimental study on the residual interfacial bonding performance between cfrps and concrete after high temperatures |
| topic | Bridge engineering Fire Elevated temperature CFRP Concrete Epoxy resin |
| url | https://doi.org/10.1186/s43251-025-00168-2 |
| work_keys_str_mv | AT yushiyin experimentalstudyontheresidualinterfacialbondingperformancebetweencfrpsandconcreteafterhightemperatures AT qinhuayang experimentalstudyontheresidualinterfacialbondingperformancebetweencfrpsandconcreteafterhightemperatures AT zhihuizhang experimentalstudyontheresidualinterfacialbondingperformancebetweencfrpsandconcreteafterhightemperatures AT haiyangluan experimentalstudyontheresidualinterfacialbondingperformancebetweencfrpsandconcreteafterhightemperatures AT chenli experimentalstudyontheresidualinterfacialbondingperformancebetweencfrpsandconcreteafterhightemperatures |