STRUCTURAL SAFETY EVALUATION BY MEANS OF
29th Our World in Concrete and Structures (OWICs) - 2004
V.1. Carbone, Politecnico di Torino, Italy
G. Mancini*, Politecnico di Torino, Italy
F. Tondolo, Politecnico di Torino, Italy
fuzzy, fuzzy-probabilistic, safety factor
The evaluation of the safety level in concrete structures should be done
considering the stochastic behavior of main involved parameters not only in ultimate
conditions but also in serviceability and durability ones. In fact, particularly in
concrete structures, the large variability of fundamental mechanical parameters, may
give rise to important deviations from the behavior expected if a deterministic
approach is used.
On the other hand it is well known that the probability density functions and
their parameters cannot be defined univocally. To overcome this problem the fuzzyprobabilistic
theory may be used in processing stochastic parameters, consideration
taken to the fuzzy nature of their character.
In practice the probabilistic level 3 method may be used but, due to the fuzzy
nature of involved variables, the analysis produces a fuzzy-probabilistic result.
The above procedure is applied to a bridge prestressed beam, to evaluate its
behavior in serviceability condition, with particular attention to the crack formation