ABSTRACT
Assessing the structural health of ancient masonry constructions via vibration measurements has become a common practice. This chapter focuses on a vibration measurements campaign performed on the medieval Maddalena Bridge in Borgo a Mozzano, near Lucca, also known as "Ponte del Diavolo", one of the most fascinating old masonry bridges in Italy. The monitoring system has been mainly aimed at evaluating the dynamic response of the bridge to vibrations originating in the adjacent railway and two nearby roads. The chapter discusses a vibration measurement campaign on the Maddalena Bridge, also known as "Ponte del Diavolo", in Borgo a Mozzano near Lucca. The bridge was instrumented with four SARA threeaxial seismometric stations. Each seismic station contains a SL06 24-bit digitizer coupled to a SS20 seismometer. A sampling frequency of 100 Hz was chosen to acquire the structure's response to ambient excitation.
