DAMAGE IDENTIFICATION IN A BENCHMARK CABLE-STAYED BRIDGE USING THE INTERPOLATION METHOD

In this paper the damage localization algorithm based on Operational Deformed Shapes (ODS) and known as Interpolation Damage Detection Method (IDDM), is applied to the numerical model of a cable stayed bridge. Frequency response functions (FRFs) have been calculated basing on the responses of the bridge to low intensity seismic excitation and used to recover the ODS both in the transversal and in the vertical direction. The analysis have been carried in the undamaged configuration and repeated in several different damaged configurations Results show that the method is able to provide the correct location of damage, provided an accurate estimation of the ODSs is available.