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Durham Research Online
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Analysis of maximum arching conditions in active plane-strain trapdoors in sand.

Osman, Ashraf S. and Jacobsz, S.W. (2019) 'Analysis of maximum arching conditions in active plane-strain trapdoors in sand.', Computers and geotechnics., 113 . p. 103089.

Abstract

The trapdoor problem is a useful model to understand the stress distribution around geo-structures. This paper focuses on evaluating the conditions of maximum arching (minimum loads on trapdoors) developing during the lowering of plane-strain active trapdoors in cohesionless granular materials. A parametric study using finite element analysis has been performed to investigate various factors affecting the maximum arching conditions in active trapdoors, with a particular focus on the effect of soil dilatancy. The paper also presents rigorous upper bound limit analysis solutions. Previously published solutions dealing with soil non-associativity have been discussed and compared with the finite element results. The finite element analysis shows that using a Mohr Column model with the associative flow rule and reduced strength parameters, overestimates the load reduction on trapdoors compared with a non-associative model with full soil strength parameters.

Item Type:Article
Full text:(AM) Accepted Manuscript
Available under License - Creative Commons Attribution Non-commercial No Derivatives.
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1016/j.compgeo.2019.05.004
Publisher statement:© 2019 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Date accepted:05 May 2019
Date deposited:30 May 2019
Date of first online publication:16 May 2019
Date first made open access:16 May 2020

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