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Enhancement of a high‐cycle accumulation model by an adaptive strain amplitude and its application to monopile foundations

Staubach, Patrick ; Machaček, Jan ; Tschirschky, Lisa ; Wichtmann, Torsten (2022)
Enhancement of a high‐cycle accumulation model by an adaptive strain amplitude and its application to monopile foundations.
In: International Journal for Numerical and Analytical Methods in Geomechanics, 2021, 46 (2)
doi: 10.26083/tuprints-00020477
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Enhancement of a high‐cycle accumulation model by an adaptive strain amplitude and its application to monopile foundations
Language: English
Date: 10 February 2022
Place of Publication: Darmstadt
Year of primary publication: 2021
Publisher: John Wiley & Sons
Journal or Publication Title: International Journal for Numerical and Analytical Methods in Geomechanics
Volume of the journal: 46
Issue Number: 2
DOI: 10.26083/tuprints-00020477
Corresponding Links:
Origin: Secondary publication service
Abstract:

The high-cycle accumulation (HCA) model by Niemunis et al. allows the prediction of the mechanical response of sand under millions of load cycles. It has originally been developed with focus on sand under drained high-cyclic loading assuming a constant strain amplitude, which can be periodically updated. In order to apply it for partially drained or fully undrained conditions, an adaptive definition of the strain amplitude is proposed in this work. The proposed extension allows taking into account the influence of rapid changes in soil stiffness on the strain amplitude as encountered, for example, in case of large changes in effective stress during the high-cyclic loading. Two approaches are presented for the update of the strain amplitude: a ‘private’ update in each integration point combined with a nonlocal smoothing algorithm and an update in a separate analysis performed parallel to the simulation using the HCA model. Both approaches are compared to the methodology used in previous work employing so-called update cycles. The importance and advantages of the proposed modifications are demonstrated by the simulation of undrained cyclic triaxial tests and monopile foundations for offshore wind turbines (OWTs) under high-cyclic lateral loading and partially drained conditions.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-204776
Additional Information:

KEYWORDS: high-cycle accumulation model, high-cyclic loading, offshore wind turbine foundations, par-tially drained, Sanisand, strain amplitude

Classification DDC: 500 Science and mathematics > 550 Earth sciences and geology
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Geotechnics
Date Deposited: 10 Feb 2022 13:18
Last Modified: 14 Nov 2023 19:04
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20477
PPN: 500861943
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