George Anoyatis
Dynamic pile impedances for fixed-tip piles
Anoyatis, George; Laora, Raffaele Di; Lemnitzer, Anne
Authors
Raffaele Di Laora
Anne Lemnitzer
Abstract
© 2017 Elsevier Ltd The behavior of a laterally loaded pile with fixed-tip boundary condition (i.e., displacement and rotation, are perfectly restrained) is evaluated using a recently proposed, improved Tajimi-type model. The model performance in both, static and dynamic regime is first validated against rigorous finite element solutions and subsequently compared with Winkler model results for a selected range of pile-soil system parameters. In addition, pile impedances for fixed-tip piles are compared with previously proposed impedance expressions for hinged-tip piles. Results indicate that pile tip fixity has moderate impact on the pile stiffness in rotation but show stronger influence for pile stiffness in swaying and cross-swaying. The effect of tip fixity on pile impedances diminishes when piles are longer than approximately ten pile diameters. The proposed expressions for damping were evaluated across a wide range of frequencies, and damping was found to be most pronounced in rotation across the entire spectrum of pile-soil stiffness ratios examined. Winkler based formulations from literature almost exclusively over-predict damping for fixed tip piles.
Citation
Anoyatis, G., Laora, R. D., & Lemnitzer, A. (2017). Dynamic pile impedances for fixed-tip piles. Soil Dynamics and Earthquake Engineering, 97, 454-467. https://doi.org/10.1016/j.soildyn.2017.03.025
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 15, 2017 |
Online Publication Date | Apr 5, 2017 |
Publication Date | Jun 1, 2017 |
Deposit Date | Apr 7, 2017 |
Publicly Available Date | Mar 29, 2024 |
Journal | Soil Dynamics and Earthquake Engineering |
Print ISSN | 0267-7261 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 97 |
Pages | 454-467 |
DOI | https://doi.org/10.1016/j.soildyn.2017.03.025 |
Keywords | soil–pile interaction, lateral loading, fixed tip, dynamic pile impedances, Tajimi model, dynamics |
Public URL | https://uwe-repository.worktribe.com/output/896773 |
Publisher URL | http://doi.org/10.1016/j.soildyn.2017.03.025 |
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