... with cones to respect the normality condition imposed by the upper-bound method of the limit analysis theory. These authors presented solutions for collapse and blow-out problems in 1 Professor, IUP Génie Civil et Infrastructures, L.G.C.N.S.N., Bd. de l université, BP 152, 44603 Saint-Nazaire cedex, France...

...). Ten configurations of defects have been made in a GCL Bentomat type AS50. The main characteristics of this GCL are given in table 1. The defects consist in four open circular holes of 10, 17, 30 and 40 cm, and four other circular holes where a cone is inserted. The cones have been used to make...

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... generalIsation oE the MC yield criterion is that proposed by Drucker and Prager (DP). This is a right circular cone and is also shown in Fig. 1 in the forms referred to as the compression, upper bound (circumscribed) cone and the lower bound (inscribed) cone. The DP criterion is expressed by the following yield...

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