Three-dimensional limit analysis of rigid blocks assemblages. Part I: Torsion failure on frictional interfaces and limit analysis formulation

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Limit analysis of masonry vaults by means of curved shell finite elements and homogenization (2008, background): “This violates one of the hypotheses of classic limit analysis theory (see for instance Ferris and Tin-Loi, 2001; Orduña and Lourenço, 2003, 2005), implying that the uniqueness of the ultimate load may be lost and a multiplicity of solutions may exist for limit analysis problems, see for instance…”
Modeling Strategies for the Computational Analysis of Unreinforced Masonry Structures: Review and Classification (2019, methodology): “Later, Orduña and Lourenço [116, 117] proposed a solu-tion procedure for the non-associated limit analysis of rigid block masonry assemblages, incorporating non-associated flow rules and a coupled yield surface.”
Discrete Element Modeling of Masonry Structures (2007, methodology): “Analysis methods for 3D systems were developed by Baggio and Trovalusci (2000) and Orduña and Lourenço (2005).”