Liu, S, Wang, J, Wanatowski, D orcid.org/0000-0002-5809-0374 et al. (1 more author) (2019) Effect of Material Stiffness Variation on Shakedown Solutions of Soils Under Moving Loads. In: Sustainable Civil Infrastructures. The GeoChina 2018 International Conference, 23-25 Jul 2018, HangZhou, China. Springer, Cham , pp. 73-82. ISBN 9783319957586
Abstract
Shakedown limits of pavements and railway foundations can be calculated based on shakedown theorems. These values can be used to guide the thickness designs of pavement and railway constructions considering material plastic properties. However, most existing shakedown analyses were carried out by assuming a unique stiffness value for each material. This paper mainly concentrates on the influence of stiffness variation on the shakedown limits of pavements and railway foundations under moving loads. Finite element models as well as a user-defined material subroutine UMAT are first developed to obtain the elastic responses of soils considering a linearly increasing stiffness modulus with depth. Then, based on the lower-bound shakedown theorem, shakedown solutions are obtained by searching for the most critical self-equilibrated residual stress field. It is found that for a single-layered structure, the rise of a stiffness changing ratio will give a larger shakedown limit; and the increase is more pronounced when the friction angle is relatively high. For multi-layered pavement and railway systems, neglecting the stiffness variation may overestimate the capacity of the structures.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Springer International Publishing AG, part of Springer Nature 2019. This is an author produced version of an article published in Sustainable Civil Infrastructures. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Shakedown Solution; Variable Stiffness; Varying Material Stiffness; Shakedown Limit; Shakedown Theorem |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > SWJTU Joint School (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 24 Mar 2021 15:45 |
Last Modified: | 24 Mar 2021 16:01 |
Status: | Published |
Publisher: | Springer, Cham |
Identification Number: | 10.1007/978-3-319-95759-3_6 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:172334 |