TU Darmstadt / ULB / TUbiblio

Influence of relative acceleration in saturated sand: Analytical approach and simulation of vibratory pile driving tests

Staubach, Patrick ; Machaček, Jan (2019)
Influence of relative acceleration in saturated sand: Analytical approach and simulation of vibratory pile driving tests.
In: Computers and Geotechnics, 112
doi: 10.1016/j.compgeo.2019.03.027
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

In this work, 1 g model tests on vibratory pile driving in saturated sand are simulated, using different coupled element formulations in conjunction with a hypoplastic constitutive model. Owing to the high frequency of the vibrator in the model tests, the influence of the relative acceleration between the solid and water phases cannot be neglected a priori. The frequently applied u-p formulation assumes the relative acceleration to be zero; hence, two additional element formulations (the u-U and u-p-U approaches) are applied. A general investigation regarding the relative acceleration is first conducted using a semi-analytical approach, based on which the impact of the relative acceleration can be expressed by the wave frequency and hydraulic conductivity alone. Further, a threshold level of applicability of the u-p formulation is established. A comparison of the different element formulations used in the simulation of the vibratory driving model tests reveals that the relative acceleration has little impact, and the frequency threshold level obtained by the analytical solution holds. The simulations exhibit strong accordance with the experimental data in terms of pile penetration and pore pressure development. Different numerical aspects of the element formulations are discussed, including problems regarding volumetric locking and conditioning of the stiffness matrices.

Typ des Eintrags: Artikel
Erschienen: 2019
Autor(en): Staubach, Patrick ; Machaček, Jan
Art des Eintrags: Bibliographie
Titel: Influence of relative acceleration in saturated sand: Analytical approach and simulation of vibratory pile driving tests
Sprache: Englisch
Publikationsjahr: 2019
Verlag: Elsevier BV
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Computers and Geotechnics
Jahrgang/Volume einer Zeitschrift: 112
DOI: 10.1016/j.compgeo.2019.03.027
URL / URN: http://www.sciencedirect.com/science/article/pii/S0266352X19...
Kurzbeschreibung (Abstract):

In this work, 1 g model tests on vibratory pile driving in saturated sand are simulated, using different coupled element formulations in conjunction with a hypoplastic constitutive model. Owing to the high frequency of the vibrator in the model tests, the influence of the relative acceleration between the solid and water phases cannot be neglected a priori. The frequently applied u-p formulation assumes the relative acceleration to be zero; hence, two additional element formulations (the u-U and u-p-U approaches) are applied. A general investigation regarding the relative acceleration is first conducted using a semi-analytical approach, based on which the impact of the relative acceleration can be expressed by the wave frequency and hydraulic conductivity alone. Further, a threshold level of applicability of the u-p formulation is established. A comparison of the different element formulations used in the simulation of the vibratory driving model tests reveals that the relative acceleration has little impact, and the frequency threshold level obtained by the analytical solution holds. The simulations exhibit strong accordance with the experimental data in terms of pile penetration and pore pressure development. Different numerical aspects of the element formulations are discussed, including problems regarding volumetric locking and conditioning of the stiffness matrices.

Freie Schlagworte: Relative acceleration, Vibratory pile driving, Element formulations, High frequency, Semi-analytical solution
Fachbereich(e)/-gebiet(e): 13 Fachbereich Bau- und Umweltingenieurwissenschaften
13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut für Geotechnik
Hinterlegungsdatum: 03 Nov 2020 15:16
Letzte Änderung: 20 Nov 2020 12:18
PPN:
Export:
Suche nach Titel in: TUfind oder in Google
Frage zum Eintrag Frage zum Eintrag

Optionen (nur für Redakteure)
Redaktionelle Details anzeigen Redaktionelle Details anzeigen