Operational Modal Analysis as a Support for the Development of Digital Twin Models of Bridges

Many transportation infrastructures all around the world are facing new challenges in terms of ageing and loss performance. The infrastructural asset managers required to perform scrupulous control health condition over time execute maintenance works. In this context, digital twin models should have a key role simplify speed up procedures for proper maintenance. This paper discusses advantages developing management infrastructures, with focus on bridges. particular, dynamic tests performed bridges development is addressed, paying attention test requirements. Issues such as quality instrumentation, numerosity, layout sensors, acquisition post-processing addressed through applications two real bridge case studies. Both multi-span pre-stressed RC that were dynamically tested after restoration seismic upgrading Results ambient vibration operational modal analyses described, providing an idea requirements, well their use within framework model creation.