Analysis of reynolds number effects on bridge deck sections by the PSE method / Suzhe Yang in European journal of environmental and civil engineering, Vol. 15 N° 1 (Janvier 2011)  

Public ISBD [article]  inEuropean journal of environmental and civil engineering > Vol. 15 N° 1 (Janvier 2011) . - pp. 99-124 Titre : Analysis of reynolds number effects on bridge deck sections by the PSE method Type de document : texte imprimé Auteurs : Suzhe Yang, Auteur ; Christian Crémona, Auteur ; Zhiyong Zhou, Auteur Année de publication : 2011 Article en page(s) : pp. 99-124 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : PSE Vortex methods Reynolds Strouhal Bridge deck cross-sections Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Reynolds numbers play an important role in fluid dynamics, because flow separations and reattachments are often Reynolds-number dependent, even if the bodies have sharp edges. To satisfy Reynolds scaling in experiments, the model scale can be very large. Computational fluid dynamics (CFD) provides an interesting alternative to wind tunnel tests, especially when Reynolds effects have to be assessed for a design stage. In this paper, the particle strength exchange (PSE) of vortex methods is introduced for assessing Reynolds number effects on bridge deck cross-sections. For this purpose, this study analyses how the aerodynamic forces of two different bridges sections are influenced by these effects. The computation results with PSE are compared with wind tunnel tests. The relation between Strouhal numbers and Reynolds numbers are also analyzed and compared with experimental results. All the results show that the particle strength exchange method can be efficiently used to calculate Reynolds effects on 2-dimensional bridge deck sections. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=15666 [article] Analysis of reynolds number effects on bridge deck sections by the PSE method [texte imprimé] / Suzhe Yang, Auteur ; Christian Crémona, Auteur ; Zhiyong Zhou, Auteur . - 2011 . - pp. 99-124. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 1 (Janvier 2011) . - pp. 99-124 Mots-clés : PSE Vortex methods Reynolds Strouhal Bridge deck cross-sections Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Reynolds numbers play an important role in fluid dynamics, because flow separations and reattachments are often Reynolds-number dependent, even if the bodies have sharp edges. To satisfy Reynolds scaling in experiments, the model scale can be very large. Computational fluid dynamics (CFD) provides an interesting alternative to wind tunnel tests, especially when Reynolds effects have to be assessed for a design stage. In this paper, the particle strength exchange (PSE) of vortex methods is introduced for assessing Reynolds number effects on bridge deck cross-sections. For this purpose, this study analyses how the aerodynamic forces of two different bridges sections are influenced by these effects. The computation results with PSE are compared with wind tunnel tests. The relation between Strouhal numbers and Reynolds numbers are also analyzed and compared with experimental results. All the results show that the particle strength exchange method can be efficiently used to calculate Reynolds effects on 2-dimensional bridge deck sections. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=15666

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Application of the reliability theory to the assessment of carbonation-induced corrosion risk of rebars / Mickael Thiery in European journal of environmental and civil engineering, Vol. 16 N° 3-4 (Mars/Avril 2012)  

Public ISBD [article]  inEuropean journal of environmental and civil engineering > Vol. 16 N° 3-4 (Mars/Avril 2012) . - pp. 273-287 Titre : Application of the reliability theory to the assessment of carbonation-induced corrosion risk of rebars Type de document : texte imprimé Auteurs : Mickael Thiery, Auteur ; Christian Crémona, Auteur ; Véronique Baroghel-Bouny, Auteur Année de publication : 2012 Article en page(s) : pp. 273-287 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Carbonation Durability design Probabilistic approach Reliability index Updating Résumé : Deterministic approaches for the prediction of the carbonation penetration have limitations related to the high variability of the input data. This paper deals with two carbonation models which are developed in the framework of a probabilistic approach. The random input data are presented, i.e. materials, environment and engineering design properties. The evaluation of the time-dependent probability of carbonation-induced reinforcement corrosion is assessed by calculating the reliability index for three studied concretes. This probabilistic approach provides a framework for a sensitivity analysis which enables one to identify the most influencing model parameters which have to be determined carefully in order to improve the accuracy of the prediction and to determine the parameters whose variability should be reduced to enhance the durability. Furthermore, a probabilistic approach provides a tool to design the thickness of the concrete cover in order to avoid oversizing. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.667987 [article] Application of the reliability theory to the assessment of carbonation-induced corrosion risk of rebars [texte imprimé] / Mickael Thiery, Auteur ; Christian Crémona, Auteur ; Véronique Baroghel-Bouny, Auteur . - 2012 . - pp. 273-287. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 N° 3-4 (Mars/Avril 2012) . - pp. 273-287 Mots-clés : Carbonation Durability design Probabilistic approach Reliability index Updating Résumé : Deterministic approaches for the prediction of the carbonation penetration have limitations related to the high variability of the input data. This paper deals with two carbonation models which are developed in the framework of a probabilistic approach. The random input data are presented, i.e. materials, environment and engineering design properties. The evaluation of the time-dependent probability of carbonation-induced reinforcement corrosion is assessed by calculating the reliability index for three studied concretes. This probabilistic approach provides a framework for a sensitivity analysis which enables one to identify the most influencing model parameters which have to be determined carefully in order to improve the accuracy of the prediction and to determine the parameters whose variability should be reduced to enhance the durability. Furthermore, a probabilistic approach provides a tool to design the thickness of the concrete cover in order to avoid oversizing. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.667987

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Damage mechanics applied to the modelling of corroded reinforced concrete structures / Frédéric Ragueneau in European journal of environmental and civil engineering, Vol. 14 N° 6-7 (Juin 2010)  

Public ISBD [article]  inEuropean journal of environmental and civil engineering > Vol. 14 N° 6-7 (Juin 2010) . - pp. 869-890 Titre : Damage mechanics applied to the modelling of corroded reinforced concrete structures : Steel, concrete and interface Type de document : texte imprimé Auteurs : Frédéric Ragueneau, Auteur ; Benjamin Richard, Auteur ; Christian Crémona, Auteur Année de publication : 2011 Article en page(s) : pp. 869-890 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Corrosion Damage Plasticity Steel/concrete interface Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Continuum damage mechanics allows accounting at the representative elementary volume for microcracks growth. Nowadays, describing the mechanical behavior of corroded structures remains of primary importance, especially when optimal maintenance policies have to be defined. Expressed within the framework of continuum damage mechanics, three constitutive models to describe the behavior of corroded steel, concrete and steel/concrete interface are exposed in this paper. To highlight the coupling use of these models, a bidimensional structural application is shown. It consists in a corroded RC beam subjected to a four-point bending test. Numerical results appear as encouraging for further developments. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp [article] Damage mechanics applied to the modelling of corroded reinforced concrete structures : Steel, concrete and interface [texte imprimé] / Frédéric Ragueneau, Auteur ; Benjamin Richard, Auteur ; Christian Crémona, Auteur . - 2011 . - pp. 869-890. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 14 N° 6-7 (Juin 2010) . - pp. 869-890 Mots-clés : Corrosion Damage Plasticity Steel/concrete interface Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Continuum damage mechanics allows accounting at the representative elementary volume for microcracks growth. Nowadays, describing the mechanical behavior of corroded structures remains of primary importance, especially when optimal maintenance policies have to be defined. Expressed within the framework of continuum damage mechanics, three constitutive models to describe the behavior of corroded steel, concrete and steel/concrete interface are exposed in this paper. To highlight the coupling use of these models, a bidimensional structural application is shown. It consists in a corroded RC beam subjected to a four-point bending test. Numerical results appear as encouraging for further developments. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp

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