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dc.contributor.authorSloan, Scott W.
dc.contributor.authorLyamin, Andrei V.
dc.contributor.authorKrabbenhoft, Kristian
dc.description.abstractThis paper describes an adaptive method for incorporating the pore pressures associated with steady-state seepage in finite element limit analysis. The formulation can model both general seepage conditions, and locating the phreatic surface in unconfined flow presents no special difficulty [1]. Since the proposed method employs the same mesh for the upper analysis, the lower-bound analysis and the pore pressure computation, there is no need to import and interpolate the pore-pressures from another grid (or program). This is a significant practical advantage and leads to an efficient solution process. In the iterative solution method, a Hessian(curvature)-based error estimator is applied to the pore pressure field to generate a mesh which gives accurate pore pressures. Simultaneously, a variant of the ‘bounds gap’ error estimator of [2],[3] is employed to identify a separate mesh which gives accurate upper and lower bounds on the limit load. By combining these two strategies, a hybrid refinement strategy is developed which minimises both the bounds gap and the error in the computed pore pressures.
dc.format.extent12 p.
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits
dc.subject.lcshFinite element method
dc.subject.lcshCoupled problems (Complex systems) -- Numerical solutions
dc.subject.otherFinite Element, Limit Analysis, Pore Pressures, Coupled Problems
dc.titleAdaptive finite element limit analysis incorporating steady state pore pressures
dc.typeConference report
dc.subject.lemacElements finits, Mètode dels
dc.rights.accessOpen Access
local.citation.contributorCOUPLED V
local.citation.publicationNameCOUPLED V : proceedings of the V International Conference on Computational Methods for Coupled Problems in Science and Engineering :

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