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Dynamic analysis of multilayered soils to water waves and flow / Ping-Cheng Hsieh in Journal of engineering mechanics, Vol. 133 N°3 (Mars 2007) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 133 N°3 (Mars 2007) . - pp.357–366. Titre : Dynamic analysis of multilayered soils to water waves and flow Type de document : texte imprimé Auteurs : Ping-Cheng Hsieh, Auteur ; Wen-Po Hsieh, Auteur Année de publication : 2007 Article en page(s) : pp.357–366. Note générale : Applied mechanics Langues : Anglais (eng) Mots-clés : Water  waves  Viscoelasticity  Seepage  Multimedia Résumé : In nature, a soil profile generally consists of several heterogeneous layers. This study is aimed at discussing the interactive problem of oscillatory water waves and flow passing over multilayered soils. The soil behavior is considered as viscoelastic in the present mathematical model modified from Biot’s poroelastic theory. Employing this model, the dynamic response including the profiles of pore water pressure and effective stress in the multilayered soils is discussed. The results reveal that the perturbed pore pressure is different from that inside a single-layered soil where the thickness of the first soil layer is less than the water wavelength. The discrepancy of the vertical effective stresses between multilayered and single-layered soils is even much more apparent under the same conditions. Moreover, seepage force is examined and is found to be larger near the bed surface and the bottom of the first soil layer where soils are easily disturbed by external disturbance. The locations where soil failure might happen are found near the troughs of surface water waves. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A3%2835 [...] [article] Dynamic analysis of multilayered soils to water waves and flow [texte imprimé] / Ping-Cheng Hsieh, Auteur ; Wen-Po Hsieh, Auteur . - 2007 . - pp.357–366. Applied mechanics Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 133 N°3 (Mars 2007) . - pp.357–366. Mots-clés : Water  waves  Viscoelasticity  Seepage  Multimedia Résumé : In nature, a soil profile generally consists of several heterogeneous layers. This study is aimed at discussing the interactive problem of oscillatory water waves and flow passing over multilayered soils. The soil behavior is considered as viscoelastic in the present mathematical model modified from Biot’s poroelastic theory. Employing this model, the dynamic response including the profiles of pore water pressure and effective stress in the multilayered soils is discussed. The results reveal that the perturbed pore pressure is different from that inside a single-layered soil where the thickness of the first soil layer is less than the water wavelength. The discrepancy of the vertical effective stresses between multilayered and single-layered soils is even much more apparent under the same conditions. Moreover, seepage force is examined and is found to be larger near the bed surface and the bottom of the first soil layer where soils are easily disturbed by external disturbance. The locations where soil failure might happen are found near the troughs of surface water waves. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A3%2835 [...]