Connolly, DP and Yu, HS orcid.org/0000-0003-3330-1531 (2021) A shakedown limit calculation method for geogrid reinforced soils under moving loads. Geotextiles and Geomembranes, 49 (3). pp. 688-696. ISSN 0266-1144
Abstract
A method to calculate the elastic shakedown limit of transportation systems (e.g. pavements and railways) supported by geogrid reinforced soils is presented. For the first time, lower-bound shakedown theory is combined with a strength-based geogrid simulation approach, resulting in a rapid method to quantify the benefit of geogrids on the elastic shakedown limit. It allows decoupling of elastic stress generation and shakedown calculations, meaning it is straightforward to implement, and requires minimal computational effort. Therefore it presents a useful tool to optimise geogrid design for transportation structures such as highway pavements and railways. To show the capability of the method, shakedown limits are calculated for a variety of geogrid configurations using elastic stresses induced by a moving Hertz load. The effect of geogrid depth, soil cohesion, soil friction angle and loading type (normal versus tangential) are investigated for reinforced and non-reinforced soils. It is found that the optimum depth is sensitive to the soil strength properties. Regarding loading, it is shown that for highly tangential loads, shallower geogrids are effective, while for loads with a minimal tangential component, deeper geogrids are effective.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 Elsevier Ltd. All rights reserved. This is an author produced version of an article published in Geotextiles and Geomembranes. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Highway pavement design; Geogrid reinforced soil; Shakedown limit theory; Moving cyclic loading; Railway track subgrade |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 28 Jan 2021 12:10 |
Last Modified: | 30 Dec 2021 01:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.geotexmem.2020.11.009 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:170467 |