One of the key issues related to the stability and durability of modern buildings and such infrastructural works as masterpieces or places of historical interest, is represented by the assessment of the response to dynamic stresses they may be subjected to in the course of their lives as a result of those phenomena that can be continuous or constant over the time (such as the effect of the vehicular traffic, the wind on a bridge or the seismic events). In these cases it is necessary to accurately measure both speeds and accelerations that the structures can hold up without any significant damage. In order to measure the movements produced by dynamic stresses, it is necessary to use real-time sensors, because speed and frequency of the movements are so high to require data acquisition architectures usually made up of accelerometers with characteristics that vary depending on the investigated object and connected to high resolution acquisition systems. Below the main targets of the dynamic surveys on structures:
- Checking the project’s validity and consequent compliance to it in the realization of the work performed
- Dynamic characterization of infrastructures, buildings, historical monuments affected by temporary or permanent vibrations induced by: urban, rail or any kind of heavy traffic
- Real response of the structures to events of hydrologic or seismic instability.
- Monitoring of damages or breaks of structural elements caused by induced vibrations