Closed-form dynamic stiffness formulation for modal and dynamic response analysis of pile group foundations

Simple item page
dc.contributor.authorLiu, Xiang
dc.contributor.authorZhao, Yaxing
dc.contributor.authorLu, Tao
dc.contributor.authorXu, Hao
dc.contributor.authorYang, Liang
dc.date.accessioned2023-05-16T14:17:45Z
dc.date.available2023-05-16T14:17:45Z
dc.date.issued2023-04-24
dc.description.abstractA closed-form dynamic stiffness (DS) formulation is proposed for pile group foundations. This model consists of a rigid cap and an arbitrary number of flexible piles. The rigid cap, connecting to all piles, is modeled as a rigid body resting on an elastic foundation. For each pile, a longitudinal soil–pile model and a preloaded Timoshenko beam on viscoelastic Pasternak foundation are adopted to describe the longitudinal and transverse vibration, respectively. The piles can be either friction piles or end-bearing piles, and pile sections surrounded by different soil layers can be easily modeled by the assembly of pile elements with different parameters. The proposed DS formulations essentially use very few degrees of freedom to, nevertheless, describe the broadband dynamic behaviors of complex pile group foundations in a highly accurate manner. The DS formulation is then used for modal and dynamic response analysis. For modal analysis, the Wittrick–Williams algorithm is applied, with the key issue count problems resolved. The proposed method is verified against some existing results. This research provides an exact and highly efficient modal and response analysis tool for pile group foundations, which can be used for the dynamic analysis of pile foundations subjected to earthquake or traffic excitations.en_UK
dc.identifier.citationLiu X, Zhao Y, Lu T, et al., (2023) Closed-form dynamic stiffness formulation for modal and dynamic response analysis of pile group foundations. Computers and Geotechnics, Volume 159, July 2023, Article number 105481en_UK
dc.identifier.issn0266-352X
dc.identifier.urihttps://doi.org/10.1016/j.compgeo.2023.105481
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19657
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectPile group foundationsen_UK
dc.subjectViscoelastic Pasternak foundationen_UK
dc.subjectDynamic stiffness methoden_UK
dc.subjectWittrick–Williams algorithmen_UK
dc.subjectModal analysisen_UK
dc.subjectFrequency response analysisen_UK
dc.titleClosed-form dynamic stiffness formulation for modal and dynamic response analysis of pile group foundationsen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
response_analysis_of_pile_group_foundations-2023.pdf
Size:
2.32 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SWEE)