Creep behaviour and creep recovery of FRP reinforced timber elements
The use of reinforcement in timber beams has been shown to improve the short-term flexural behaviour but the long-term behaviour is often more complex, particularly when subjected to a variable climate condition. In this study, the creep deflection behaviour of unreinforced and basalt fibre reinforc...
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| Published in | Wood material science and engineering Vol. 20; no. 4; pp. 769 - 777 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Taylor & Francis
04.07.2025
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1748-0272 1748-0280 |
| DOI | 10.1080/17480272.2025.2480248 |
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| Abstract | The use of reinforcement in timber beams has been shown to improve the short-term flexural behaviour but the long-term behaviour is often more complex, particularly when subjected to a variable climate condition. In this study, the creep deflection behaviour of unreinforced and basalt fibre reinforced polymer (FRP) reinforced beams were subjected to creep tests at a common maximum compressive stress of 8 MPa over a 450-week (≈ 8.5 years) period. This study built upon data previously presented by the authors for a test period of 75 weeks. Furthermore, the tested elements were unloaded, and the creep recovery data was also presented. A significant reduction in total creep deflection due to the FRP reinforcement was observed in the results obtained in both a variable and constant climate. Once unloaded, the results indicate that a significant proportion of creep can be recovered when subjected to a constant climate, however, when subject to a variable climate, there appears to be a significant proportion of non-recoverable deformation. |
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| AbstractList | The use of reinforcement in timber beams has been shown to improve the short-term flexural behaviour but the long-term behaviour is often more complex, particularly when subjected to a variable climate condition. In this study, the creep deflection behaviour of unreinforced and basalt fibre reinforced polymer (FRP) reinforced beams were subjected to creep tests at a common maximum compressive stress of 8 MPa over a 450-week (≈ 8.5 years) period. This study built upon data previously presented by the authors for a test period of 75 weeks. Furthermore, the tested elements were unloaded, and the creep recovery data was also presented. A significant reduction in total creep deflection due to the FRP reinforcement was observed in the results obtained in both a variable and constant climate. Once unloaded, the results indicate that a significant proportion of creep can be recovered when subjected to a constant climate, however, when subject to a variable climate, there appears to be a significant proportion of non-recoverable deformation. |
| Author | McPolin, Daniel Walsh, Thomas Sikora, Karol Moran, Gary Harte, Annette M. O'Ceallaigh, Conan McGetrick, Patrick J. |
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| SubjectTerms | Basalt fibre creep behaviour creep recovery engineered wood products reinforced timber Sitka spruce |
| Title | Creep behaviour and creep recovery of FRP reinforced timber elements |
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