Kinematic pile response to vertical P-wave seismic excitation

George Mylonakis, George Gazetas

Research output: Contribution to journalArticlepeer-review

63 Scopus citations


An analytical solution based on a rod-on-dynamic-Winkler-foundation model is developed for the response of piles in a soil layer subjected to vertical seismic excitation consisting of harmonic compressional waves. Closed-form solutions are derived for: (1) the motion of the pile head; (2) the peak normal strain in the pile, and (3) the group effect between neighboring piles. The solutions are expressed in terms of a dimensionless kinematic response factor 1ν, relating pile-head motion and free-field soil surface motion, a dimensionless strain transmissibility factor 1ε, relating pile and soil peak normal strains, and a pile-to-pile interaction factor α measuring group effects. It is shown that a pile foundation may significantly reduce the vertical seismic excitation transmitted to the base of a structure.

Original languageBritish English
Pages (from-to)860-867
Number of pages8
JournalJournal of Geotechnical and Geoenvironmental Engineering
Issue number10
StatePublished - Oct 2002


  • Excitation
  • Kinematics
  • Pile foundations
  • Piles


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