Most of the railway bridges in Europe were built during the twentieth century with designs in which the boundary conditions are far from the current conditions. The new scenario in terms of higher speeds and loads, particularly linked to the TEN, requires an in-depth review of structural condition of the old bridges and a prognosis of their behaviour for the new conditions. This paper describes two complementary methodologies for the determination of the current and future structural condition of railway bridges based on the use of data and statistical approaches without the need of complex simulation models, developed within the Shift2Rail IN2TRACK project. These methodologies aim at supporting the decision process of infrastructure managers at the time of evaluation of the needs of refurbishment or re-strengthening in this type of infrastructures in an efficient and reliable way.

Data-driven structural assessment of railway bridges by Empirical Green Functions and Fragility Curves