Multiparametric Limit Analysis of Frames: Part II—Computations

Abstract
A systematic computational approach is developed for the generation of n‐dimensional global‐polyhedral‐limit hypersurfaces for frames. The maximal facets of the polyhedra are shown to correspond to unique failure modes. Algorithmic procedures are described for the identification of limit hypersurfaces and the individual failure modes. Bending‐moment distributions at collapse for each failure mode, load combinations leading to a given mode, and modal correlations can be obtained. Other structural properties of polyhedra are explored and illustrated with examples.

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