ABSTRACT
Assessment of structural conditions of bridges by means of dynamic testing is a crucial task in every effective maintenance program. However, mainly due to economic reasons, bridge structures and infrastructures are usually monitored through visual inspections without performing any experimental test. Dynamic forced vibrations are carried out only in special cases, when the relevance of the structure is high or the damage conditions are critical. On the contrary, dynamic testing in operational conditions is directly related to low costs and simplification of in-situ surveys suitable for a large number of bridges.
