Abstract
The paper presents the preliminary results of an ongoing research on a masonry arch bridge in the neighborhood of Todi (Umbria, Italy). A multidisciplinary approach integrating geometric survey, dynamic testing and numerical modeling is presented aimed to assess the structural performance of the ancient bridge.A photogrammetric survey based on high resolution images provided by UAV (Unmanned Aerial Vehicle) has been processed in order to obtain a 3D numerical model and to map the crack layout. Ambient and forced vibration tests have been carried out using laser vibrometer, radar interferometer and seismic accelerometers. Experimental data have been processed by operational modal analysis and the results have been compared with the numerical results given by a simplified model.
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