Research Article
Mar 1982
Horizontal Stiffness and Damping of Single Piles
Authors: Ricardo Dobry, M.ASCE, Ernesto Vicenti, Michael J. O'Rourke, M.ASCE, and Jose M. Roesset, M.ASCEAuthor Affiliations
Publication: Journal of the Geotechnical Engineering Division
Volume 108, Issue 3
Abstract
Simple expressions are developed for the equivalent horizontal spring and damping coefficients at the top of an end-bearing pile embedded in a uniform linear soil. Beam on elastic foundation (BEF) and dynamic finite element analyses are used for this purpose. It is demonstrated that, for long end-bearing piles, the top displacement response at high frequencies is independent of the pile length, and the pile behaves identically to a long floating pile in a half-space. A numerical criterion is presented to decide when a pile is long or short. All results are expressed as a function of the pile and soil Young's Moduli, Ep and Es, and they are valid for a range of Poisson's Ratios of the soil between 0.25 and 0.49. Finally, expressions are also presented for the soil springs and dashpots required for more complicated BEF analyses of piles in multilayer soils. The results presented in the paper show good agreement with previous studies.
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Published In
Journal of the Geotechnical Engineering Division
Volume 108 • Issue 3 • March 1982
Pages: 439 - 459
Copyright
© 1982 American Society of Civil Engineers.
History
Published in print: Mar 1982
Published online: Feb 11, 2021
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Authors
Affiliations
Ricardo Dobry, M.ASCE
Prof., Dept. of Civ. Engrg. Rensselaer Polytechnic Inst., Troy, N.Y. 12181
Ernesto Vicenti
Grad. Student, Dept. of Civ. Engrg., Rensselaer Polytechnic Inst., Troy, N.Y. 12181
Michael J. O'Rourke, M.ASCE
Assoc. Prof., Dept. of Civ. Engrg., Rensselaer Polytechnic Inst., Troy, N.Y. 12181
Jose M. Roesset, M.ASCE
Prof., Dept. of Civ. Engrg., Univ. of Texas, Austin, Tex. 78712
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