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- W2110178314 abstract "A simple analytical solution is developed for computing the dynamic impedances of floating rigidly-capped pile groups with due consideration to pile-soil-pile interaction. The method introduces some sound physical approximations and considers the interference of cylindrical wave fields originating along each pile shaft and spreading radially outward. Axial, lateral, and rocking oscillations of rigidly-capped pile groups are studied parametri-cally. Results are presented for the dynamic stiffness and damping of the whole group, and for the distribution of dynamic loads amongst the individual piles. The predictions of the simple method for vertical and rocking oscillations compare extremely well with rigorous numerical solutions, thereby offering a valuable insight into the nature of pile-soil-pile interaction. It is demonstrated and explained how the dynamic efficiency may far exceed unity at certain resonant frequencies due to destructive wave interference. The proposed method can be readily applied by engineers already familiar with the use of static interaction factors in the design of pile groups. Une solution analytique très simple est développée pour calculer les impédances dynamiques de groupes de pieux flottants à têtes rigides dans le cadre de à l'interaction pieux/sol/pieux. La méth-ode introduit des approximations physiques val-ables et prend en considération l'interference de champs d'ondes cylindriques qui ont leur origine le long de chaque fût de pieux et se propagent radi-alement vers l'exterieur. L'article étudie sous l'aspect paramétrique les sollicitations axiales, latérales et oscillants de groupes de pieux à casques rigides. Des résultats sont présentés pour la rigidité dynamique et 1'amortissement du groupe entier et pour la distribution des charges dynamiques entre les pieux individuels. Les prédictions par cette méthode très simple des oscillations verti-cales et basculantes supportent extrêmement bien la comparaison avec celles des solutions numér-iques rigoureuses, ce qui donne un aperçu valable de la nature de l'interaction pieux-sol-pieux. On démontre et explique comment le groupe dynamique représentant l'effet utile peut dépasser de beaucoup l'unite à certaines fréquences de résonance à cause de l'interférence destructive des ondes. La méthode proposée peut être facilement appliquée par des ingénieurs qui connaissent déjà bien I'emploi de facteurs statiques d'interaction dans la construction de groupes de pieux." @default.
- W2110178314 created "2016-06-24" @default.
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- W2110178314 date "1988-12-01" @default.
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- W2110178314 title "Simple method for dynamic stiffness and damping of floating pile groups" @default.
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- W2110178314 doi "https://doi.org/10.1680/geot.1988.38.4.557" @default.
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