Experimental Study on Fatigue Behaviour of BFRP-Concrete Bond Interfaces under Bending Load
Basalt fiber reinforced polymer (BFRP) composites are increasingly being used to retrofit concrete structures by external bonding. For such strengthened members, the BFRP-concrete interface plays the crucial role of transferring stresses. This study aims to investigate the fatigue behaviour of the i...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2018/7497061 |
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| _version_ | 1832556184466358272 |
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| author | Jianhe Xie Jianglin Li Zhongyu Lu Huan Zhang |
| author_facet | Jianhe Xie Jianglin Li Zhongyu Lu Huan Zhang |
| author_sort | Jianhe Xie |
| collection | DOAJ |
| description | Basalt fiber reinforced polymer (BFRP) composites are increasingly being used to retrofit concrete structures by external bonding. For such strengthened members, the BFRP-concrete interface plays the crucial role of transferring stresses. This study aims to investigate the fatigue behaviour of the interface under bending load. A series of tests were conducted on BFRP-concrete bonded joint, including static, fatigue, and postfatigue loading. The fatigue failure modes, the development of deflection, the evolution of BFRP strains, and the propagation of interfacial cracks were analysed. In addition, the debonding-induced fatigue life of BFRP-concrete bonded joints was studied. Finally, a new model of fatigue life was proposed by defining the effective fatigue bond stress. The results showed that the fatigue experience has a significant effect on the BFRP strength especially near the root of concrete transverse crack and on the bond performance of the adhesive near the interface crack tip. There are two main fatigue failure modes: BFRP rupture and BFRP debonding. The fatigue damage development of the bond interface has three stages: rapid, stable, and unstable growth. The proposed model for the debonding-induced fatigue life is more conservative for the BFRP-concrete bonded joints under pure shear load than for those under bending load. |
| format | Article |
| id | doaj-art-53a6d36055da47a295e96929e6c3649a |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-53a6d36055da47a295e96929e6c3649a2025-02-03T05:46:01ZengWileyShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/74970617497061Experimental Study on Fatigue Behaviour of BFRP-Concrete Bond Interfaces under Bending LoadJianhe Xie0Jianglin Li1Zhongyu Lu2Huan Zhang3School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, Guangdong 510006, ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, Guangdong 510006, ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, Guangdong 510006, ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, Guangdong 510006, ChinaBasalt fiber reinforced polymer (BFRP) composites are increasingly being used to retrofit concrete structures by external bonding. For such strengthened members, the BFRP-concrete interface plays the crucial role of transferring stresses. This study aims to investigate the fatigue behaviour of the interface under bending load. A series of tests were conducted on BFRP-concrete bonded joint, including static, fatigue, and postfatigue loading. The fatigue failure modes, the development of deflection, the evolution of BFRP strains, and the propagation of interfacial cracks were analysed. In addition, the debonding-induced fatigue life of BFRP-concrete bonded joints was studied. Finally, a new model of fatigue life was proposed by defining the effective fatigue bond stress. The results showed that the fatigue experience has a significant effect on the BFRP strength especially near the root of concrete transverse crack and on the bond performance of the adhesive near the interface crack tip. There are two main fatigue failure modes: BFRP rupture and BFRP debonding. The fatigue damage development of the bond interface has three stages: rapid, stable, and unstable growth. The proposed model for the debonding-induced fatigue life is more conservative for the BFRP-concrete bonded joints under pure shear load than for those under bending load.http://dx.doi.org/10.1155/2018/7497061 |
| spellingShingle | Jianhe Xie Jianglin Li Zhongyu Lu Huan Zhang Experimental Study on Fatigue Behaviour of BFRP-Concrete Bond Interfaces under Bending Load Shock and Vibration |
| title | Experimental Study on Fatigue Behaviour of BFRP-Concrete Bond Interfaces under Bending Load |
| title_full | Experimental Study on Fatigue Behaviour of BFRP-Concrete Bond Interfaces under Bending Load |
| title_fullStr | Experimental Study on Fatigue Behaviour of BFRP-Concrete Bond Interfaces under Bending Load |
| title_full_unstemmed | Experimental Study on Fatigue Behaviour of BFRP-Concrete Bond Interfaces under Bending Load |
| title_short | Experimental Study on Fatigue Behaviour of BFRP-Concrete Bond Interfaces under Bending Load |
| title_sort | experimental study on fatigue behaviour of bfrp concrete bond interfaces under bending load |
| url | http://dx.doi.org/10.1155/2018/7497061 |
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