Application of the Cyclic Strain Accumulation Method on Shallow Foundations under Eccentric Cyclic Loading in Sand

authored by: Shuhan Cao, Khalid Abdel-Rahman, Martin Achmus
Abstract: The cyclic loading of foundation structures in sand leads to an accumulation of plastic deformations in the structures. For shallow foundations of high and slender structures such as wind energy converters (WECs), an accumulation of the plastic rotations is expected under cyclic eccentric loading that is imposed by wind loads, which could be crucial for the proof of serviceability. A practical approach to predict the behavior of shallow foundations under high-cycle eccentric loading is under research. In this paper, a numerical approach, the cyclic strain accumulation method (CSAM), which has been validated for cyclically loaded monopiles, is adopted for shallow foundations under eccentric cyclic loading. Modifications to the CSAM are described, which are necessary to apply it to shallow foundations. The results that are gained with the modified method are compared with a medium-scale model test, in which the deformations of a footing with a diameter of 2.0 m under eccentric one-way cyclic loading were investigated. It can be concluded that the CSAM can make realistic predictions and shows satisfying agreement with the measured cyclic behavior. Although more experiments are needed to finally validate the method, the CSAM could be a promising numerical approach to account for the cyclic behavior of shallow foundations under eccentric cyclic loading in sand.
Organisation(s): Institute of Geotechnical Engineering
Type: Article
Journal: International Journal of Geomechanics
Volume: 24
No. of pages: 13
ISSN: 1532-3641
Publication date: 11.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Geotechnical Engineering and Engineering Geology
Electronic version(s): https://doi.org/10.1061/IJGNAI.GMENG-10024 (Access: Closed)

BibTeX

@article{5dd80889be7d4cecb6d0bd12ddc94bc5,
title = "Application of the Cyclic Strain Accumulation Method on Shallow Foundations under Eccentric Cyclic Loading in Sand",
abstract = "The cyclic loading of foundation structures in sand leads to an accumulation of plastic deformations in the structures. For shallow foundations of high and slender structures such as wind energy converters (WECs), an accumulation of the plastic rotations is expected under cyclic eccentric loading that is imposed by wind loads, which could be crucial for the proof of serviceability. A practical approach to predict the behavior of shallow foundations under high-cycle eccentric loading is under research. In this paper, a numerical approach, the cyclic strain accumulation method (CSAM), which has been validated for cyclically loaded monopiles, is adopted for shallow foundations under eccentric cyclic loading. Modifications to the CSAM are described, which are necessary to apply it to shallow foundations. The results that are gained with the modified method are compared with a medium-scale model test, in which the deformations of a footing with a diameter of 2.0 m under eccentric one-way cyclic loading were investigated. It can be concluded that the CSAM can make realistic predictions and shows satisfying agreement with the measured cyclic behavior. Although more experiments are needed to finally validate the method, the CSAM could be a promising numerical approach to account for the cyclic behavior of shallow foundations under eccentric cyclic loading in sand.",
keywords = "Cyclic deformation, Cyclic strain accumulation method, Eccentric loading, Finite-element method, Noncohesive soil, Shallow foundation, Wind energy converter",
author = "Shuhan Cao and Khalid Abdel-Rahman and Martin Achmus",
note = "Publisher Copyright: {\textcopyright} 2024 American Society of Civil Engineers.",
year = "2024",
month = nov,
doi = "10.1061/IJGNAI.GMENG-10024",
language = "English",
volume = "24",
journal = "International Journal of Geomechanics",
issn = "1532-3641",
publisher = "American Society of Civil Engineers (ASCE)",
number = "11",
}