Abstract
Since its introduction, FRC has gained quite high attention from precast industry for the potential advantages resulting from partial or total removal of conventional reinforcement, especially related to shear. As compared to non-prestressed elements, the use of precompression may allow to significantly reduce the required amount of transversal reinforcement, taking advantage of the shear force carried by prestressing tendons/cable. As proved by several research studies, the adoption of fibers may further reduce shear reinforcement, which could be only limited to support areas or to those regions where the prestressing action is not fully developed.
The current structural codes are generally very conservative in predicting the shear strength of these elements. Therefore, new research studies are needed to improve the accuracy of models for calculating the shear strength. Special focus could be also done to existing prestressed structures, which might benefit from more refined models in terms of reduction of structural repairing costs.
This paper presents a database of shear tests of prestressed FRC members, emphasizing the rather conservative predictions of the prEN 1992-1-1 (2020) and fib Model Code 2020 drafts. A critical discussion will follow.
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References
Heek, P., Look, K., Minelli, F., Mark, P., Plizzari, G.: Datenbank fur querkraftbeanspruchte Stahlfaserbetonbauteile: bewertung der Bemessungsansätze nach DAfStb-Richtlinie und fib Model Code 2010. BETON- UND STAHLBETONBAU 112, 144–154 (2017). https://doi.org/10.1002/best.201600075. ISSN: 1437–1006
fib Model Code for Concrete Structures 2010: Fédération Internationale du Béton. Ernst & Sohn, Lausanne (2013)
Annex L to prEN 1992–1–1–2020. CEN TC 250/SC2/WG1/TG2 D4
fib Model Code for Concrete Structures 2020 – Draft Volume 1V, 2020
EN 1992–2: Eurocode 2. Design of Concrete Structures. Part 2: Concrete bridges: design and detailing rules (2005)
Bentz, E.C., Vecchio, F.J., Collins, M.P.: The simplified MCFT for calculating the shear strength of reinforced concrete elements. ACI Struct. J. 103(4), 614–624 (2006)
EN 14651: Test Method for Metallic Fibre Concrete – Measuring the Flexural Tensile Strength (Limit of Proportionality (LOP), Residual). European Standard (2007)
Moraes Neto, B.N., Barros, J.A., Melo, G.S.: Model to simulate the contribution of fiber reinforcement for the punching resistance of RC slabs. J. Mater. Civ. Eng. 26(7), 04014020 (2014)
Venkateshwaran, A., Tan, K.H., Li, Y.: Residual flexural strengths of steel fiber reinforced concrete with multiple hooked-end fibers. Struct. Concr. 19(2), 352–365 (2018)
Faccin, E., Facconi, L., Minelli, F., Plizzari, G.: Predicting the residual strength of concrete reinforced with hooked-end steel fibers: new empirical equations. In: Proceedings of the RILEM-fib X International Symposium on Fibre Reinforced Concrete BEFIB2021, Valencia (Spain), 20 to 22 September 2021 (2021)
Voo, Y.L., Foster, S.J.: Shear strength of steel fiber reinforced ultra-high performance concrete beams without stirrups. In: Proceedings of the 5th International Specialty Conference on Fibre Reinforced Materials, vol. 136, no. 11, pp. 177–184 (2009)
Voo, J.Y.L., Foster, S.J.: Tensile fracture of fiber reinforced concrete: variable engagement model. In: Proceedings of the 6th Rilem Symposium on Fiber Reinforced Concrete (FRC), RILEM, Bagneux, France, pp. 875– 884 (2004)
Tan, K.H., Paramasivam, P., Murugappan, K.: Steel fibers as shear reinforcement in partially prestressed beams. ACI Struct. J. 92(6), 643–652 (1995)
Hegger, J., Tuchlinsky, D., Kommer, B.: Bond anchorage behavior and shear capacity of ultra high performance concrete beams. In: Proceedings of the International Symposium on Ultra High Performance Concrete, pp. 351–360 (2004)
Meda, A., Minelli, F., Plizzari, G.A., Riva, P.: Shear behavior of steel fibre reinforced concrete beams. Mater. Struct. 38, 343–351 (2005). ISSN 1359–5997
Hegger, J., Bertram, G.: Shear carrying capacity of Ultra-High Performance Concrete beams. In: Tailor Made Concrete Structures – Walraven & Stoelhorst (eds), Taylor & Francis Group, London, pp. 341–347 (2008). ISBN 978-0-415-47535-8
Cuenca, E., Serna, P.: Shear behavior of prestressed precast beams made of self-compacting fiber reinforced concrete. Constr. Build. Mater. 45, 145–156 (2013)
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Mantelli, S.G. et al. (2022). Code Provisions for Shear Strength in Prestressed FRC Members: A Critical Review. In: Serna, P., Llano-Torre, A., MartÃ-Vargas, J.R., Navarro-Gregori, J. (eds) Fibre Reinforced Concrete: Improvements and Innovations II. BEFIB 2021. RILEM Bookseries, vol 36. Springer, Cham. https://doi.org/10.1007/978-3-030-83719-8_50
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DOI: https://doi.org/10.1007/978-3-030-83719-8_50
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