Documents disponibles écrits par cet auteur

Load-settlement response of rectangular and circular piles in multilayered soil / H. Seo in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N°3 (Mars 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N°3 (Mars 2009) . - pp. 420–430 Titre : Load-settlement response of rectangular and circular piles in multilayered soil Type de document : texte imprimé Auteurs : H. Seo, Auteur ; B. Basu, Auteur ; M. Prezzi, Auteur Année de publication : 2009 Article en page(s) : pp. 420–430 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Elastic  analysis  Piles  Settlement  Layered  soils  Variational  principles Résumé : Traditionally, analyses developed for circular piles have also been used for rectangular piles by replacing in calculations the rectangular pile with a circular pile of equivalent area. In this paper, we present a settlement analysis that applies to piles with either rectangular or circular cross sections installed in multilayered soil deposits. The analysis follows from the solution of the differential equations governing the displacements of the pile-soil system obtained using variational principles. The input parameters needed for the analysis are the pile geometry and the elastic constants of the soil and pile. Pile displacements and vertical soil displacements calculated using this analysis match well those from finite-element analysis. A parametric study highlights some important insights for rectangular and circular piles in multilayered soil. A user-friendly spreadsheet program (ALPAXL) was developed to facilitate the use of the analysis. Examples illustrate the use of the analysis in design. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A3%2842 [...] [article] Load-settlement response of rectangular and circular piles in multilayered soil [texte imprimé] / H. Seo, Auteur ; B. Basu, Auteur ; M. Prezzi, Auteur . - 2009 . - pp. 420–430. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N°3 (Mars 2009) . - pp. 420–430 Mots-clés : Elastic  analysis  Piles  Settlement  Layered  soils  Variational  principles Résumé : Traditionally, analyses developed for circular piles have also been used for rectangular piles by replacing in calculations the rectangular pile with a circular pile of equivalent area. In this paper, we present a settlement analysis that applies to piles with either rectangular or circular cross sections installed in multilayered soil deposits. The analysis follows from the solution of the differential equations governing the displacements of the pile-soil system obtained using variational principles. The input parameters needed for the analysis are the pile geometry and the elastic constants of the soil and pile. Pile displacements and vertical soil displacements calculated using this analysis match well those from finite-element analysis. A parametric study highlights some important insights for rectangular and circular piles in multilayered soil. A user-friendly spreadsheet program (ALPAXL) was developed to facilitate the use of the analysis. Examples illustrate the use of the analysis in design. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A3%2842 [...]

Resistance factors for use in load and resistance factor design of driven pipe piles in sands / K. C. Foye in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N°1 (Janvier 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N°1 (Janvier 2009) . - pp. 1–13 Titre : Resistance factors for use in load and resistance factor design of driven pipe piles in sands Type de document : texte imprimé Auteurs : K. C. Foye, Auteur ; G. Abou-Jaoude, Auteur ; M. Prezzi, Auteur Année de publication : 2009 Article en page(s) : pp. 1–13 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Load  factors  Limit  states  Foundation  design  Load  and  resistance  factor  design  Driven  piles  Axial  loads  Cone  penetration  test  Sand Résumé : Load and resistance factor design of foundations is done in the offshore industry and is now being done in bridge projects in the United States. Common methods used to establish resistance factors include calibration to assumed factors of safety and reliability analysis using field load test databases. Reliability analyses are the preferred tools for this work but the needed probabilistic information regarding design method uncertainty is difficult to obtain. Furthermore, field load test databases, while relatively attractive for assessing design uncertainty, are not able to discriminate between uncertainties caused by soil variability, test methods, and model design relationships. In contrast to previous efforts, this paper illustrates an approach to uncertainty assessment that seeks to isolate the various sources of uncertainty. Using this approach, reliability analysis is used to develop resistance factors for the design of driven pipe piles in sand. The resistance factor results are used to highlight some of the differences between design methods that are exposed by the proposed uncertainty assessment technique. A brief design example is also given that illustrates the use of the resistance factors. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A1%281% [...] [article] Resistance factors for use in load and resistance factor design of driven pipe piles in sands [texte imprimé] / K. C. Foye, Auteur ; G. Abou-Jaoude, Auteur ; M. Prezzi, Auteur . - 2009 . - pp. 1–13. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N°1 (Janvier 2009) . - pp. 1–13 Mots-clés : Load  factors  Limit  states  Foundation  design  Load  and  resistance  factor  design  Driven  piles  Axial  loads  Cone  penetration  test  Sand Résumé : Load and resistance factor design of foundations is done in the offshore industry and is now being done in bridge projects in the United States. Common methods used to establish resistance factors include calibration to assumed factors of safety and reliability analysis using field load test databases. Reliability analyses are the preferred tools for this work but the needed probabilistic information regarding design method uncertainty is difficult to obtain. Furthermore, field load test databases, while relatively attractive for assessing design uncertainty, are not able to discriminate between uncertainties caused by soil variability, test methods, and model design relationships. In contrast to previous efforts, this paper illustrates an approach to uncertainty assessment that seeks to isolate the various sources of uncertainty. Using this approach, reliability analysis is used to develop resistance factors for the design of driven pipe piles in sand. The resistance factor results are used to highlight some of the differences between design methods that are exposed by the proposed uncertainty assessment technique. A brief design example is also given that illustrates the use of the resistance factors. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A1%281% [...]