Issue 50

G. Belokas, Frattura ed Integrità Strutturale, 50 (2019) 354-369; DOI: 10.3221/IGF-ESIS.50.30 367 of many countries for the case of overall stability of natural and cut slopes. According to this, for the drained conditions, the following components are used for deterministic analysis: a) the design strength c d = c k /( γ Μ γ m ), (tan φ ) d =(tanφ) k /( γ Μ γ m ) with γ m =1.0 (irrespectively of the type of analysis) and γ Μ =1.25, b) the permanent actions G d = γ G G k , with γ G =1.0 and c) the mobile design loads are Q d = γ Q Q k , with γ Q =0 or 1.3 for favourable or unfavourable loads respectively. Table 11 shows the results for the deterministic analyses, in which the four characteristic strength values of Table 6 have been used, factored by γ Μ =1.25 for the design strength values. The minimum safety margin ( SM ) and safety factor ( SF ) Figure 9 : Influence of each uncertainty coefficient on the value of SM = SM m - ku SM . Figure 10 : Influence of each uncertainty coefficient on the probability of SM <0. Figure 11 : Influence of each uncertainty coefficient on the value of SF = SF m - ku SF .