Rotation and moment redistribution capacity of fiber-reinforced concrete beams: parametric analysis and code compliance
| Autor: | Albert de la Fuente, Alejandro Nogales, Nikola Tošić |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Enginyeria de la Construcció, Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. EC - Enginyeria de la Construcció |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Materials science
Parametric analysis business.industry Enginyeria civil::Materials i estructures::Materials i estructures de formigó [Àrees temàtiques de la UPC] Deformation capacity Building and Construction Fiber-reinforced concrete Structural engineering Moment redistribution Rotation law.invention Ultimate limit state Formigó armat -- Propietats mecàniques Fiber-reinforced concrete -- Mechanical properties Mechanics of Materials law Code (cryptography) General Materials Science Ductility business Civil and Structural Engineering |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | Fiber-reinforced concrete (FRC) has been proved to be a competitive solution for structural purposes. Extensive research has highlighted the benefits of adding fibers on the post-cracking strength, reduced crack spacing and crack width, and improved durability, among others. However, these aspects are related to serviceability limit states, and significant work remains to be done in terms of ultimate limit state behavior of FRC members. As recent publications have emphasized, reinforced concrete beams with low reinforcement ratios may result in a reduction of deformation capacity and, hence, to a loss of ductility. To further investigate this topic, this paper presents the results of a numerical parametric study of simply and continuous supported hybrid-reinforced concrete (HRC) beams made with different amounts of fibers and reinforcement ratios. The deformation, rotational, and moment redistribution capacity of those were assessed by means of a finite-element model previously calibrated using experimental results available in the literature. The results showed that there is a significant reduction of rotation capacity and moment redistribution for lightly reinforced (hybrid) members. Finally, the paper contains practical recommendations in terms of minimum reinforcement ratios that guarantee adequate rotation and redistribution capacity of HRC members. As such, the results of this study can provide a contribution toward more reliable structural designs of HRC members. The authors express their gratitude to the Spanish Ministry of Economy, Industry and Competitiveness for the financial support received under the scope of the project CREEF (PID2019-108978RB-C32). Likewise, the first author acknowledges the Spanish Ministry of Science, Innovation and University for providing support through the PhD Industrial Fellowship (DI-17-09390) in collaboration with Smart Engineering Ltd. (UPC's Spin-Off). |
| Databáze: | OpenAIRE |
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