Documents disponibles écrits par cet auteur

Development of a generalised formula for dynamic active earth pressure / W. C. Kim in Géotechnique, Vol. 60 N° 9 (Septembre 2010) 

Public ISBD [article]  in Géotechnique > Vol. 60 N° 9 (Septembre 2010) . - pp. 723-727 Titre : Development of a generalised formula for dynamic active earth pressure Type de document : texte imprimé Auteurs : W. C. Kim, Auteur ; D. Park, Auteur ; B. Kim, Auteur Année de publication : 2011 Article en page(s) : pp. 723-727 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Retaining  walls  Earth  pressure  Dynamics Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The Mononobe–Okabe method is widely used in practice to estimate dynamic active earth pressure. The method, derived from Coulomb's theory, cannot account for the effect of cohesion and hence cannot be used for a cohesive backfill. In addition, the effect of wall adhesion and external load cannot be taken into account. This paper develops a new general formula for dynamic active earth pressure on a yielding wall. The strength of the formula is that it can take into account the effects of cohesion, wall adhesion and external load on dynamic active pressure, while remaining simple in form. The dynamic earth pressures calculated by the proposed formula, the Mononobe–Okabe method, and the graphical solution are compared for validation. The comparisons demonstrate the accuracy of the proposed formula. The formula is used in a parametric study to investigate the influence of cohesion, wall adhesion and external load. This study shows that the additional terms can significantly influence the calculated dynamic active earth pressure. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.09.t.001 [article] Development of a generalised formula for dynamic active earth pressure [texte imprimé] / W. C. Kim, Auteur ; D. Park, Auteur ; B. Kim, Auteur . - 2011 . - pp. 723-727. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 60 N° 9 (Septembre 2010) . - pp. 723-727 Mots-clés : Retaining  walls  Earth  pressure  Dynamics Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The Mononobe–Okabe method is widely used in practice to estimate dynamic active earth pressure. The method, derived from Coulomb's theory, cannot account for the effect of cohesion and hence cannot be used for a cohesive backfill. In addition, the effect of wall adhesion and external load cannot be taken into account. This paper develops a new general formula for dynamic active earth pressure on a yielding wall. The strength of the formula is that it can take into account the effects of cohesion, wall adhesion and external load on dynamic active pressure, while remaining simple in form. The dynamic earth pressures calculated by the proposed formula, the Mononobe–Okabe method, and the graphical solution are compared for validation. The comparisons demonstrate the accuracy of the proposed formula. The formula is used in a parametric study to investigate the influence of cohesion, wall adhesion and external load. This study shows that the additional terms can significantly influence the calculated dynamic active earth pressure. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.09.t.001

Effect of aluminum on the corrosion resistance of low-alloy steel in 10 wt% sulfuric acid solution / N. D. Nam in Materials and corrosion, Vol. 63 N° 11 (Novembre 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 11 (Novembre 2012) . - pp. 1004–1010 Titre : Effect of aluminum on the corrosion resistance of low-alloy steel in 10 wt% sulfuric acid solution Type de document : texte imprimé Auteurs : N. D. Nam, Auteur ; W. C. Kim, Auteur ; J.-G. Kim, Auteur Année de publication : 2014 Article en page(s) : pp. 1004–1010 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Acid  corrosion;  aluminum;  electrochemical  impedance  spectroscopy;  low-alloy  steel;  potentiodynamic Résumé : The aqueous corrosion behavior of low-alloy steel with aluminum contents was examined in a 10 wt% H2SO4 (pH 0.13) solution using electrochemical techniques and surface analyses. The corrosion resistance of the new alloy steel was evaluated in terms of electrochemical parameters, such as passive current density, film, and charge transfer resistances. The results showed that a high Al content in the steel imparted better passivation behavior resulting in a lower corrosion rate. It related to the enrichment of iron carbonate and hydrocarbon by the dissolution of the carbide phase. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106351/abstract [article] Effect of aluminum on the corrosion resistance of low-alloy steel in 10 wt% sulfuric acid solution [texte imprimé] / N. D. Nam, Auteur ; W. C. Kim, Auteur ; J.-G. Kim, Auteur . - 2014 . - pp. 1004–1010. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 11 (Novembre 2012) . - pp. 1004–1010 Mots-clés : Acid  corrosion;  aluminum;  electrochemical  impedance  spectroscopy;  low-alloy  steel;  potentiodynamic Résumé : The aqueous corrosion behavior of low-alloy steel with aluminum contents was examined in a 10 wt% H2SO4 (pH 0.13) solution using electrochemical techniques and surface analyses. The corrosion resistance of the new alloy steel was evaluated in terms of electrochemical parameters, such as passive current density, film, and charge transfer resistances. The results showed that a high Al content in the steel imparted better passivation behavior resulting in a lower corrosion rate. It related to the enrichment of iron carbonate and hydrocarbon by the dissolution of the carbide phase. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106351/abstract