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Analysis of maximum arching conditions in active plane-strain trapdoors in sand

Osman, Ashraf S.; Jacobsz, S.W.

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Authors

S.W. Jacobsz



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.

Citation

Osman, A. S., & Jacobsz, S. (2019). Analysis of maximum arching conditions in active plane-strain trapdoors in sand. Computers and Geotechnics, 113, Article 103089. https://doi.org/10.1016/j.compgeo.2019.05.004

Journal Article Type Article
Acceptance Date May 5, 2019
Online Publication Date May 16, 2019
Publication Date Sep 30, 2019
Deposit Date May 30, 2019
Publicly Available Date May 16, 2020
Journal Computers and Geotechnics
Print ISSN 0266-352X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 113
Article Number 103089
DOI https://doi.org/10.1016/j.compgeo.2019.05.004

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