Parametric numerical study on service-load deflections of reinforced recycled aggregate concrete slabs and beams based on fib Model Code 2010
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hdl:2117/190666
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Data publicació2020-12
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Abstract
Recycled aggregate concrete (RAC) is entering into structural design codes such as the new Eurocode 2. However, serviceability limit state (SLS) behavior of RAC, especially deflections, can be significantly greater than for natural
aggregate concrete. Proposals for deflection control of RAC exist, but there still have not been significant studies on their implications for SLS design. In this paper, a comprehensive numerical parametric study on the sustained serviceload deflections of reinforced RAC slabs and beams is described. First, a concrete material model for the time-dependent analysis of reinforced concrete structures is described, validated, and calibrated, incorporating fib Model Code 2010 creep and shrinkage models in the OpenSees structural analysis program. Then, service-load deflection analyses are conducted on RAC one-way slabs and T-beams considering the amount of coarse recycled concrete aggregate (RCA), concrete strength class, element height, span, statical system, relative
humidity, and quasi-permanent load-to-design load ratio. The results show that RCA begins to have an appreciable effect on deflections only for coarse aggregate replacement percentages above 25%. At 50% replacement, the maximum spans to satisfy deflection limits can be considerably reduced; however, these reductions are smaller for T-beams and higher class concrete. The results confirm the versatility of the numerical model, as well as the applicability and limitations of RAC in SLS design.
Descripció
This is the peer reviewed version of the following article: [ Tošić, N, Kurama, Y. Parametric numerical study on service‐load deflections of reinforced recycled aggregate concrete slabs and beams based on fib Model Code 2010. Structural Concrete. 2020; 1– 15. https://doi-org.recursos.biblioteca.upc.edu/10.1002/suco.202000015], which has been published in final form at https://onlinelibrary.wiley.com/doi/abs/10.1002/suco.202000015. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving
CitacióTosic, N.; Kurama, Y. Parametric numerical study on service-load deflections of reinforced recycled aggregate concrete slabs and beams based on fib Model Code 2010. "Structural Concrete", Desembre 2020, vol. 21, núm. 6, p. 2854-2868.
ISSN1751-7648
Versió de l'editorhttps://onlinelibrary.wiley.com/doi/full/10.1002/suco.202000015
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