Abstract
For biaxial states of stress in mass concrete structures, safety can be assessed in terms of the Mohr failure criterion. Safety is generally evaluated by a deterministic factor of safety. When loads vary and material properties are not known with certainty, reliability analysis evaluates safety probabilistically. In this paper, deterministic and probabilistic safety evaluations are compared in terms of levels of uncertainty associated with load and resistance parameters and the extent is indicated to which the probabilistic approach is more informative than the deterministic approach. The effect on this comparison of several characteristics of concrete material is investigated. Three widely recognized design criteria are likewise compared.
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