Damage assessment of a gradually damaged prestressed concrete bridge using static load tests and non-linear vibration characteristic KU Leuven
The detection of damage in bridges is mainly done by visual examination. However, defects as for instance partial rupture of a prestressing cable cannot be visually observed. It is well known that damage changes dynamic structural parameters like eigenfrequencies, modeshapes and damping. Since the sensitivity of changes in modal properties is sometimes low, this paper presents an approach that makes use of non-linear dynamic behaviour. The basic ...