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# A-posteriori error estimation in axisymmetric geotechnical analyses

journal contribution
posted on 18.08.2009, 15:03 by Ashraf El-Hamalawi, M.D. Bolton
In this paper, an a-posteriori error estimator suitable for use in axisymmetric geotechnical analyses has been developed. The consolidation superconvergent patch recovery with equilibrium and boundaries (CSPREB) method, developed for plane-strain coupledconsolidation problems, is extended to axisymmetric analyses. The use of pore pressures in the error estimator was found to improve results when predicting consolidation. Collapse loads under undrained soil conditions are known to be over-predicted due to “locking”, especially in axial symmetry where there are further displacement constraints. The proposed solution technique reduced locking slightly, but could not eliminate it, as it is inherent in the displacement formulation for lower order elements.

## School

• Architecture, Building and Civil Engineering

## Citation

EL-HAMALAWI, A. and BOLTON, M.D., 2002. A-posteriori error estimation in axisymmetric geotechnical analyses. Computers and Geotechnics, 29(8), pp. 587-607.

## Version

AM (Accepted Manuscript)

2002

## Notes

This article was published in the journal, Computers and Geotechnics [© Elsevier] and the definitive version is available at: www.elsevier.com/locate/issn/0266352X

0266-352X

en
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