I need methods that do not need long-term monitoring.
The significant advances achieved in the modal identification, sensors, and structural monitoring of bridges have motivated the bridge engineering community to develop damage detection methods based on vibration monitoring. Some of these methods have already been demonstrated under certain conditions in bridges with deliberate damage. However, the performance of these methods for damage detection in bridges has not been fully proven so far and more research needs to be done in this direction. In some articles, six damage detection methods based on vibration monitoring are evaluated. The dynamic simulation and modal parameters of a cracked composite bridge can be obtained. The damage detection methods can be evaluated under different crack depth, the extension of the damage, and the noise level. Also, the damage can be identified in a reinforced concrete bridge. The damage detection methods, which do not require a comparison between different structural conditions, may be applied. In some cases the damage detection methods could detect damage for all the damage scenarios; however, their performance can be notably affected when noise is introduced to the vibration parameters. Depending on the target accuracy the monitoring period may be short-term up to long-term.
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