Non-linear and linear models in design of retaining walls
| Autor: | A. Grammatikopoulou, David M. Potts, H. D. St John |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Engineering
business.industry Linear system Linear elasticity Constitutive equation Linear model Stiffness Structural engineering Geotechnical Engineering and Engineering Geology Retaining wall Finite element method Deflection (engineering) Earth and Planetary Sciences (miscellaneous) medicine medicine.symptom business |
| Zdroj: | Proceedings of the Institution of Civil Engineers - Geotechnical Engineering. 161:311-323 |
| ISSN: | 1751-8563 1353-2618 |
| DOI: | 10.1680/geng.2008.161.6.311 |
| Popis: | This paper compares non-linear and linear elasto-plastic models in the numerical analyses of a retaining wall in stiff clay. The paper aims to be applicable to routine design, where often a non-linear elasto-plastic model is not available and instead a linear elasto-plastic model is used. Current guidelines suggest deriving the appropriate linear elastic stiffness from the non-linear soil behaviour, on the basis of the expected straining in the ground. However, it is not always straightforward to choose a representative strain level. The paper presents profiles of linear elastic stiffness, back-calculated to match the maximum wall deflection of the non-linear analyses in the short term. On the basis of the non-linear soil stiffness–strain curve, the paper then derives a corresponding strain level for each linear elastic stiffness profile. Three different support systems are examined: a single-propped wall, a double-propped wall, and a top-down construction. A number of non-linear stiffness–strain curves are considered for the stiff clay and two K0 profiles are examined. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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