For the continuous measurement of static and dynamic parameters of civil and industrial works, SOCOTEC Italia designs, installs and manages structural monitoring systems both with wireless sensor networks and with high-precision automated topographic instruments.
- Static field monitoring (static testing)
- Monitoring in dynamic field (dynamic testing)
- Monitoring of lesions and cracks induced by the vibrations of the structures
- Load tests
- Diagnostics and surveys on structures
- Dynamic analysis and vibration measurements
- Verities of seismic vulnerability
Map cracking monitoring
In a damaged complex it is of primary importance to examine the lesions in their characteristics and in their developments, with the aim of defining the origin of the causes and therefore to prepare an adequate plan of intervention of reorganization or restructuring. The control, at time intervals, of the single injured element is carried out by means of high-sensitivity linear displacement transducers, with manual reading (deformometer), to be periodically affixed to special bases. Applying appropriate displacement transducers in correspondence with the lesions, or in any case at the critical points, it is possible to record the time course of openings / closures and therefore variations in amplitude of the lesions.
Measurements of deformations
Through sensors that allow the measurement of deformations: strain gauges. The electrical resistance strain gauges used are particularly suitable (in addition to measurements in the static field) for dynamic deformation measurements. In these cases the same acquisition systems used in the dynamics are used and able to perform simultaneous sampling on multiple channels, with high frequencies.
Measurements of tension state in masonry
The tests with single flat jack allow to evaluate the tension state existing in the masonry by reading the pressure necessary to restore the convergence of the edges of a flat cut made perpendicularly to the test surface. Tests with double flat jacks determine the behaviour of the masonry subjected to a single-axis compressed stress induced on site through the insertion of flat jacks inside two cuts made perpendicularly to the test surface and the reading of the deformations of the brickwork increase in pressure inside the jacks themselves.
Static field monitoring (viaduct testing)
Loading tests on a bridge or viaduct generally present problems of great complexity. The goal is to reproduce the load conditions that generate the maximum stresses or deformations within the structure. The test load is generally obtained with trucks full of aggregates, while the measurement of vertical displacements is performed using different methodologies depending on the structural type and geographical conditions (the measurement of vertical displacements is performed through centesimal comparators appropriately installed, or through the optical levelling technique)
Monitoring in dynamic field (viaduct testing)
The excitation mode of the work, generally produced by truck traffic and / or their sudden stop, has the purpose of reproducing the stresses generated by road traffic. The instrumentation used for the dynamic characterization of the work consists of tri-axial piezoelectric accelerometers and relative data acquisition system.