Dynamic response of Tapered piles under axial vibrations

Sonal Singh, Nihar Ranjan Patra

In the proceedings of: GeoOttawa 2017: 70th Canadian Geotechnical Conference; 12th joint with IAH-CNC

Session: Field Cases III

ABSTRACT: In this study, the dynamic response of a conventional concrete tapered pile subjected to simple harmonic axial vibrations is investigated. For a constant volume of the pile, the tapered pile is modeled in two series: Series one with constant pile tip diameter and series two with constant length. The finite element method based software PLAXIS-3D is used to obtain the response curves of the soil-pile system. A comparison is made with the available analytical solution of the tapered pile under vertical vibration. Using the derived response curves the stiffness and the damping ratio of the soil-pile system are calculated. It is observed that the resonant frequency and the stiffness of the soil-pile system increase with the taper angle for the piles of the first series. Whereas, for the second series the resonant frequency and the stiffness decrease with the taper angle. Keywords: Tapered pile; Finite element method; Response curves; Damping; Stiffness

RÉSUMÉ: pieux conique en béton conventionnel, soumis à des vibrations axiales harmoniques simples. Pour un volume constant du pieux, le pieux conique est modélisé en deux séries : série 1 avec diamètre de pointe constant et série deux avec une longueur constante. Le logiciel PLAXIS-3D est utilisé pour obtenir les courbes de réponse du système sol-pieu, basé sur la méthode des éléments finis. Une comparaison est faite avec la solution analytique disponible du pieux conique soumis à des vibrations verticales. La rigidu système sol-pieu en utilisant les courbes de réponse dérivée sont calculés. On observe que la fréquence de résonance et la rigidité du système sol-pieux de la première série. Cependant, pour la deuxième série la fréquence de résonance et la rigidité diminuent avec de conicité.

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Cite this article:
Sonal Singh; Nihar Ranjan Patra (2017) Dynamic response of Tapered piles under axial vibrations in GEO2017. Ottawa, Ontario: Canadian Geotechnical Society.

@article{geo2017Paper683,author = Sonal Singh; Nihar Ranjan Patra,title = Dynamic response of Tapered piles under axial vibrations,year = 2017}