A simple rotational spring model for laterally loaded rigid piles in sand

Wang, H.; Lehane, B. M.; Bransby, M. F.; Askarinejad, A.; Wang, L. Z.; Hong, Y.

doi:10.1016/j.marstruc.2022.103225

A simple rotational spring model for laterally loaded rigid piles in sand

Title

A simple rotational spring model for laterally loaded rigid piles in sand

Author

Wang, H. (TU Delft Geo-engineering)
Lehane, B. M. (University of Western Australia)
Bransby, M. F. (University of Western Australia)
Askarinejad, A. (TU Delft Geo-engineering)
Wang, L. Z. (Zhejiang University)
Hong, Y. (Zhejiang University)

Date

2022

Abstract

Monopiles are the most popular foundation for offshore wind turbines. These foundations typically have a low length to diameter ratio and undergo a rigid body rotation when subjected to lateral load. This paper presents results from an extensive numerical investigation involving 3D finite element analyses to demonstrate that the lateral moment-rotation response of a monopile in sand can be represented using a single non-linear rotational spring located at a depth of about 0.75 times the pile embedment. Expressions for the elastic rotational stiffness of a monopile under very low rotations are developed and these combined with observations from measured non-linear variations of rotational stiffness, that are supported by the numerical analyses, are used to develop a simple approximate expression that can be used to determine the response of a monopile to a monotonic lateral load in sand.

Subject

Hypoplastic
Lateral load
Pile-soil interaction
Rigid pile
Sands

To reference this document use:

http://resolver.tudelft.nl/uuid:92f35fb0-ea55-4a31-a37d-6c2e15e82130

DOI

https://doi.org/10.1016/j.marstruc.2022.103225

ISSN

0951-8339

Source

Marine Structures, 84

Part of collection

Institutional Repository