Debonding Analysis of FRP-Strengthened Concrete Beam in High-Temperature Environment: An Enhanced Understanding on Sustainable Structure
FRP (fiber-reinforced composite) is generally regarded as the repair and enhancement material for existing concrete structures in extreme service environments such as high temperatures or fire exposure. In order to reveal the effect of high temperatures (i.e., thermal load) on the interfacial debond...
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MDPI AG
2024-12-01
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| Online Access: | https://www.mdpi.com/2075-5309/14/12/4079 |
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| author | Xiaoning Zhang Jianwen Hao Wei Hou Jiancheng Yao Yazhuo Wang Xiaojian Su Xiangyang Li |
| author_facet | Xiaoning Zhang Jianwen Hao Wei Hou Jiancheng Yao Yazhuo Wang Xiaojian Su Xiangyang Li |
| author_sort | Xiaoning Zhang |
| collection | DOAJ |
| description | FRP (fiber-reinforced composite) is generally regarded as the repair and enhancement material for existing concrete structures in extreme service environments such as high temperatures or fire exposure. In order to reveal the effect of high temperatures (i.e., thermal load) on the interfacial debonding behavior of a FRP-strengthened concrete beam, the novel closed-form analytical model was established and validated while considering the interfacial bond-slip constitutive. Based on the analytical model, solutions to the distributions of interfacial slip, interfacial shear stress, and debonding load were derived. Moreover, the effects of temperature variations and the FRP’s bonded thickness and length on interfacial bond behavior were also evaluated. The results indicated that the increase in temperature variations accelerated the development trends of interfacial slip and shear stress, where the affected range was mainly concentrated in the bonded plate end. The relationship between temperature variations and debonding loads presented a changing linear trend, and a prediction model for the debonding load was also proposed. Meanwhile, the increase in the FRP’s bonded thickness decreased the bond performance and accelerated the degradation trend of the debonding load. However, the increase in FRP’s bonded length improved the bearing capacity of the FRP-strengthened concrete beam. This paper provides meaningful guidelines for the sustainable design and construction of FRP-strengthened concrete structures in high-temperature environments. |
| format | Article |
| id | doaj-art-68225863e6a24043aba02dbca31c55f3 |
| institution | DOAJ |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-68225863e6a24043aba02dbca31c55f32025-08-20T02:53:43ZengMDPI AGBuildings2075-53092024-12-011412407910.3390/buildings14124079Debonding Analysis of FRP-Strengthened Concrete Beam in High-Temperature Environment: An Enhanced Understanding on Sustainable StructureXiaoning Zhang0Jianwen Hao1Wei Hou2Jiancheng Yao3Yazhuo Wang4Xiaojian Su5Xiangyang Li6School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaShandong High-Speed Infrastructure Construction Co., Ltd., Jinan 250061, ChinaShandong High-Speed Infrastructure Construction Co., Ltd., Jinan 250061, ChinaShandong High-Speed Infrastructure Construction Co., Ltd., Jinan 250061, ChinaShandong High-Speed Infrastructure Construction Co., Ltd., Jinan 250061, ChinaShandong High-Speed Infrastructure Construction Co., Ltd., Jinan 250061, ChinaDepartment of Global Smart City, Sungkyunkwan University, Suwon 16419, Republic of KoreaFRP (fiber-reinforced composite) is generally regarded as the repair and enhancement material for existing concrete structures in extreme service environments such as high temperatures or fire exposure. In order to reveal the effect of high temperatures (i.e., thermal load) on the interfacial debonding behavior of a FRP-strengthened concrete beam, the novel closed-form analytical model was established and validated while considering the interfacial bond-slip constitutive. Based on the analytical model, solutions to the distributions of interfacial slip, interfacial shear stress, and debonding load were derived. Moreover, the effects of temperature variations and the FRP’s bonded thickness and length on interfacial bond behavior were also evaluated. The results indicated that the increase in temperature variations accelerated the development trends of interfacial slip and shear stress, where the affected range was mainly concentrated in the bonded plate end. The relationship between temperature variations and debonding loads presented a changing linear trend, and a prediction model for the debonding load was also proposed. Meanwhile, the increase in the FRP’s bonded thickness decreased the bond performance and accelerated the degradation trend of the debonding load. However, the increase in FRP’s bonded length improved the bearing capacity of the FRP-strengthened concrete beam. This paper provides meaningful guidelines for the sustainable design and construction of FRP-strengthened concrete structures in high-temperature environments.https://www.mdpi.com/2075-5309/14/12/4079FRPdebonding analysisprediction modelconcrete beamhigh temperature |
| spellingShingle | Xiaoning Zhang Jianwen Hao Wei Hou Jiancheng Yao Yazhuo Wang Xiaojian Su Xiangyang Li Debonding Analysis of FRP-Strengthened Concrete Beam in High-Temperature Environment: An Enhanced Understanding on Sustainable Structure Buildings FRP debonding analysis prediction model concrete beam high temperature |
| title | Debonding Analysis of FRP-Strengthened Concrete Beam in High-Temperature Environment: An Enhanced Understanding on Sustainable Structure |
| title_full | Debonding Analysis of FRP-Strengthened Concrete Beam in High-Temperature Environment: An Enhanced Understanding on Sustainable Structure |
| title_fullStr | Debonding Analysis of FRP-Strengthened Concrete Beam in High-Temperature Environment: An Enhanced Understanding on Sustainable Structure |
| title_full_unstemmed | Debonding Analysis of FRP-Strengthened Concrete Beam in High-Temperature Environment: An Enhanced Understanding on Sustainable Structure |
| title_short | Debonding Analysis of FRP-Strengthened Concrete Beam in High-Temperature Environment: An Enhanced Understanding on Sustainable Structure |
| title_sort | debonding analysis of frp strengthened concrete beam in high temperature environment an enhanced understanding on sustainable structure |
| topic | FRP debonding analysis prediction model concrete beam high temperature |
| url | https://www.mdpi.com/2075-5309/14/12/4079 |
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