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Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment

Probabilistic procedures considering the durability with respect to corrosion of reinforcement caused by aggressive substances are widely applied; however, they are based on narrow assumptions. The aspects need to be evaluated both in terms of the search for suitable application of the various exper...

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Detalles Bibliográficos
Autores principales: Lehner, Petr, Horňáková, Marie, Hrabová, Kristýna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8618124/
https://www.ncbi.nlm.nih.gov/pubmed/34832240
http://dx.doi.org/10.3390/ma14226838
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author Lehner, Petr
Horňáková, Marie
Hrabová, Kristýna
author_facet Lehner, Petr
Horňáková, Marie
Hrabová, Kristýna
author_sort Lehner, Petr
collection PubMed
description Probabilistic procedures considering the durability with respect to corrosion of reinforcement caused by aggressive substances are widely applied; however, they are based on narrow assumptions. The aspects need to be evaluated both in terms of the search for suitable application of the various experimental results and in terms of their impact on the result of the stochastic assessment itself. In this article, sensitivity analysis was used as an ideal tool to prove how input parameters affect the results of the evaluation, with consideration of different types of concrete (ordinary or self-compacting with and without fibres). These concretes may be used in aggressive environments, as an industrial floor or as a part of the load-bearing bridge structure. An example of a reinforced concrete bridge deck was selected as the solved structure. The results show that in the case of a classic evaluation, a larger amount of fibre reports a lower resistance of concrete, which contradicts the assumptions. The sensitivity analysis then shows that self-compacting concrete is more sensitive to the values of the diffusion coefficient, and with the consideration of fibres, the effect is even greater.
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spelling pubmed-86181242021-11-27 Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment Lehner, Petr Horňáková, Marie Hrabová, Kristýna Materials (Basel) Article Probabilistic procedures considering the durability with respect to corrosion of reinforcement caused by aggressive substances are widely applied; however, they are based on narrow assumptions. The aspects need to be evaluated both in terms of the search for suitable application of the various experimental results and in terms of their impact on the result of the stochastic assessment itself. In this article, sensitivity analysis was used as an ideal tool to prove how input parameters affect the results of the evaluation, with consideration of different types of concrete (ordinary or self-compacting with and without fibres). These concretes may be used in aggressive environments, as an industrial floor or as a part of the load-bearing bridge structure. An example of a reinforced concrete bridge deck was selected as the solved structure. The results show that in the case of a classic evaluation, a larger amount of fibre reports a lower resistance of concrete, which contradicts the assumptions. The sensitivity analysis then shows that self-compacting concrete is more sensitive to the values of the diffusion coefficient, and with the consideration of fibres, the effect is even greater. MDPI 2021-11-12 /pmc/articles/PMC8618124/ /pubmed/34832240 http://dx.doi.org/10.3390/ma14226838 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lehner, Petr
Horňáková, Marie
Hrabová, Kristýna
Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment
title Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment
title_full Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment
title_fullStr Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment
title_full_unstemmed Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment
title_short Sensitivity Analysis of Stochastic Calculation of SCC Regarding Aggressive Environment
title_sort sensitivity analysis of stochastic calculation of scc regarding aggressive environment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8618124/
https://www.ncbi.nlm.nih.gov/pubmed/34832240
http://dx.doi.org/10.3390/ma14226838
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