Abstract
A full-scale steel fibre reinforced self-compacting concrete elevated slab was built and tested up to failure. The experimental slab (without any conventional reinforcement), consisted of four continuous panels of 3.1 × 3.1 m2 each, supported by columns two meters above ground. The nominal thickness was 130 mm. 90 kg/m3 of steel fibres were used. For the slab testing, two opposite panels were punctually loaded. Simultaneously, displacements were recorded and crack pattern registered. Results show a fan type cracking pattern, corresponding to what is reported by literature. The maximum loads obtained were Fmax,1 = 156.4 kN and Fmax,2 = 211.8 kN, (δcentral ≈ 20 mm), and the ultimate loads FU,1 = 117.3 kN and FU,2 = 187.9 kN (δcentral ≈ 60 mm), i.e. for displacements approximately three times larger than the one registered at peak load, the slab could carry more than 75% of the peak load, showing good overall ductility. A simple software, capable of modelling yield line theory, and suitable for routine applications, was used to model the slab. The software input is the slab geometry, boundary conditions, and plastic moments. The results showed that using reasonable simplifications, a good agreement between theoretical models and experimental results can be obtained if characteristic material properties are used in the model.
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Acknowledgements
The authors would like to thank ABENGOA-TEYMA for financial support, physical resources and the assistance of their staff (especially Mauricio Montaña, Ramiro Rodriguez and Ignacio Horta without whom this work could never have been completed). The authors also thank the collaboration of the following companies and institutions: Laboratorio de Vialidad, MTOP, where testing of small specimens was carried out; Ferrocement, for supplying the fibres; Atenko, for supplying the scaffolding; and Guardia Republicana – Ministerio del Interior, on whose premises the slab was built. The authors thankfully acknowledge the students, assistants and professors that helped during the project. Funding was also made available from the Agencia Nacional de Investigación e Innovación (ANII), Uruguay, through the Research Project Herramientas para la innovación - 2017 – “HPI_X_2017_1_141290”.
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Segura-Castillo, L., Figueredo, D., Rodríguez, I., García, N. (2021). First Experimental Full-Scale Elevated FRSCC Slab in South America. In: Serna, P., Llano-Torre, A., Martí-Vargas, J.R., Navarro-Gregori, J. (eds) Fibre Reinforced Concrete: Improvements and Innovations. BEFIB 2020. RILEM Bookseries, vol 30. Springer, Cham. https://doi.org/10.1007/978-3-030-58482-5_77
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DOI: https://doi.org/10.1007/978-3-030-58482-5_77
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