Vertical Vibration of Piles

by Roger L. Kuhlemeyer, (Aff.M.ASCE), Assoc. Prof.; Dept. of Civ. Engrg., Univ. of Calgary, Calgary, Alberta, Canada,

Serial Information: Journal of the Geotechnical Engineering Division, 1979, Vol. 105, Issue 2, Pg. 273-287

Document Type: Journal Paper


Finite element results obtained using an established elastic half space model are presented for the vertical response of pile-soil systems. A simplified lumped mass (LM) model of the pile-soil system similar to a model previously described by Novak is described; results of vertical pile response obtained using this LM model compare: (1)Excellently with the response calculated based upon the finite element method; and (2)compare within 5% of the results presented by Novak for an incompressible soil. The standard dimensionless magnification factor response curves are shown to depend strongly upon: (1)The ratio of pile and soil Young's moduli; (2)pile length to radius ratio; and (3)static load on pile. Graphs are presented for use in preliminary design that provide estimates of the frequency of maximum response, aom, and of the magnification factor at aom, Mrm, as functions of the most significant material and geometric variables. The computer program used to solve for the response of the LM model is available elsewhere.

Subject Headings: Finite element method | Vertical loads | Vibration | Piles | Computer models | Soil-pile interaction | Load factors | Elastic analysis

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