Progetto di TMDs per la limitazione delle vibrazioni del ponte Parkbos (Belgio) soggetto ad azione dinamica dei pedoni

This thesis aims are to modeling and assess the vibration serviceability of the Parkbos footbridge, in Ghent, Belgium. The reliability of the predicted response depends on both the adoption of adequate models to simulate pedestrian loads and the capability of representing the actual footbridge behaviour. The footbridge modeling is obtain using the program Ansys and after, thanks to the in situ measurement, it was possible to calibrate this structural numerical model and to obtain a better representation of the real structure. The procedure includes also an experimental investigations to identify the footbridge dynamic behavior, as the natural frequencies, the mode shapes and the damping ratio. Furthermore, the adoption of suitable mathematical models to simulate pedestrian loads is important. The human-induce vibration are modeling considering a load that is based on the assumption that both feet produce exactly the same force and that force is periodic. This loading also neglects the interactions and the different characteristics of each pedestrian. It is assess the vibration serviceability, after the model calibration and the determination of the dynamic behaviour of the structure. Finally, the design of the damping device is performed to obtain an acceptable comfort level of the pedestrian on the footbridge.