Gad Bridge (object state)
A condition of an object at a particular time, reflecting the object's ability to fulfil it's requirements.
Properties
Element type
:
Object state
Summary
:
The Gerber saddles were subject to attention in the past due to the presence of strenghtening works to restore the shear resistance, not sufficient for a lack of shear reinforcement. Strengthening works were necessary, the solution chosen was the adoption of prestressing transversal dywidag bars. The saddles show local cracks and presence of corrosion signs. The Sacertis SHM system installed in March 2019 was developed for both the short and long-term monitoring. Each Gerber saddle is equipped with a chain made by five biaxial MEMS clinometers and four IoT crackmeters. The system is completed by two gateways, one per carriageway and a power line communication to connect all the devices to the network. In each sensor box are present a temperature and humidity detectors, to perform the signal compensation. Prior information available were drawings, design documents, results of periodical visual inspections. The real-time monitoring system controls the response of both clinometers and crackmeters, and an automatic alerting system activates a direct communication to the road operator in case of thresholds levels exceedance.
Prior information
:
Design standards, Drawings, Design documents, Previous inspections, Monitoring data, Numerical models
Performance indicator
:
Deformation, Displacement, Cracks (width/length/pattern)
Inspection method
:
IoT and sensor systems
Relations with other elements
:
The inspection method used in this case study to determine the object state was "IoT and sensor systems". This can include any of the following surveying technologies. Click one of the links below for more information:
IoT and sensor systems