In the recent years, structural monitoring of large infrastructures(buildings, dams, bridges) or more generally man-made structures has raisedan increased attention due to the growing interest about safety and securityissues and risk assessment through early detection. In this framework, aimof the paper is to introduce a new integrated approach which combines twosensing techniques acting on different spatial and temporal scales. Thefirst one is a distributed optic fiber sensor based on the Brillouinscattering phenomenon, which allows a spatially and temporally continuousmonitoring of the structure with a "low" spatial resolution (meter). Thesecond technique is based on the use of Ground Penetrating Radar (GPR),which can provide detailed images of the inner status of the structure (witha spatial resolution less then tens centimetres), but does not allow atemporal continuous monitoring. The paper describes the features of thesetwo techniques and provides experimental results concerning preliminary testcases.
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