Finite element modeling of creep behavior of FRP-externally strengthened reinforced concrete beams
| Autor: | Abdelkader Haddi, Mostefa Hamrat, Farid Bouziadi, Chafika Djelal, Bensaid Boulekbache |
|---|---|
| Přispěvatelé: | Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 (LGCgE), Université d'Artois (UA)-Université de Lille-Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-JUNIA (JUNIA), Université d'Artois (UA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Bending Fibre-reinforced plastic Finite element method 0201 civil engineering [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering Creep Flexural strength Rheology 021105 building & construction Ultimate tensile strength Fiber Composite material ComputingMilieux_MISCELLANEOUS Civil and Structural Engineering |
| Zdroj: | Engineering Structures Engineering Structures, Elsevier, 2020, 204, pp.109908. ⟨10.1016/j.engstruct.2019.109908⟩ Engineering Structures, 2020, 204, pp.109908. ⟨10.1016/j.engstruct.2019.109908⟩ |
| ISSN: | 0141-0296 |
| DOI: | 10.1016/j.engstruct.2019.109908⟩ |
| Popis: | In this study, a nonlinear numerical analysis is carried out to predict the creep response of reinforced concrete (RC) beams externally strengthened using carbon fiber-reinforced polymer (CFRP) and glass fiber-reinforced polymer (GFRP) laminates. The beams are tested under static four-point bending; the level of sustained service load is equal to 59% of the ultimate capacities of the un-strengthened beams. The Burger rheological model is used to evaluate the flexural creep response (compressive and tensile creep) and then to validate the findings with experimental results. It is shown that the Burger model effectively predicts the creep of CFRP-bonded RC. Furthermore, parametric studies are performed to investigate the effects of: three fiber orientations of CFRP composites (0°, 45° and 90°), the CFRP thickness, and the type of FRP (CFRP and GFRP) on the flexural creep of FRP-externally retrofitted RC beams based on the Burger rheological model. According to the numerical results, a major reduction in creep strain is obtained with the 45° orientation of CFRP. An increase in CFRP-thickness significantly lowers the creep strain. Moreover, the CFRP laminates prove to be more effective than GFRP in improving the creep response. |
| Databáze: | OpenAIRE |
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