Lower Bound Finite Element Limit Analysis of Geo-Structures with Non-Associated Flow Rule
Article
Article Title | Lower Bound Finite Element Limit Analysis of Geo-Structures with Non-Associated Flow Rule |
---|---|
ERA Journal ID | 3466 |
Article Category | Article |
Authors | Payan, Meghdad (Author), Fathipour, Hessam (Author), Hosseini, Maryam (Author), Chenari, Reza Jamshidi (Author) and Shiau, Jim S. (Author) |
Journal Title | Computers and Geotechnics |
Journal Citation | 147, pp. 1-15 |
Article Number | 104803 |
Number of Pages | 15 |
Year | 2022 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0266-352X |
1873-7633 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compgeo.2022.104803 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0266352X22001598 |
Abstract | The use of finite elements and limit analysis in the stability analysis of geo-structures is not uncommon nowadays, with the assumption of associated flow rule and rigid perfectly plastic constitutive soil model. Nevertheless, the simplified assumption may lead to misevaluation of the objective function for the nonlinear optimisation solution, thus giving rise to uncertainty in the design of geo-structures. In this study, the influence of non- associated flow rule on the stability evaluations for obliquely- and eccentrically-loaded shallow foundations, as well as for retaining structures with cohesionless granular backfill, is examined using lower bound finite elements and second-order cone programming (SOCP). A wide range of dilation angles ( ψ ) is considered for the study (e.g., from zero to a maximum of soil internal friction angle φ), and it is generally observed that failing to consider the non-associated flow rule in the soil constitutive model would yield non-conservative designs of geo- structures. These inaccurate predictions and subsequent unreliable stability analysis are more pronounced in cases of large soil internal friction angles. The findings in this study would be of great importance for practical design applications. |
Keywords | Non-associated flow rule; Lower bound; Finite element limit analysis (FELA); Second-order cone programming (SOCP); Bearing capacity; Lateral earth pressure |
ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Guilan, Iran |
School of Engineering | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7529/lower-bound-finite-element-limit-analysis-of-geo-structures-with-non-associated-flow-rule
135
total views4
total downloads1
views this month0
downloads this month