We are simulating an earthquake in the laboratory and the conditions that occur on a building in the event of a seismic event. The vibrating table used for the Hardware-in-the-loop testing (HIL) of I-Pro 1, in fact, simulates the displacement of the roof of a building (whose numerical model is known) when subjected to an earthquake. A hydraulic actuator transmits the force to the vibrating table, moving the vibrating table exactly as the forces of the earthquake would move the top floor of the building in real conditions. Once ISAAC Protection 1 (I-Pro 1) the control algorithms minimize the movement of the table; in the event of a real earthquake it would mean reducing the damage to the structure to avoid its collapse.
Earthquake simulation in the laboratory: what are the characteristics of the vibrating table used for hardware-in-the-loop tests?
The vibrating table we use to carry out the hardware-in-the-loop tests of I-Pro 1 was made of S235 steel and measures 7x2m; made according to EUROCODE 3, the table is moved by a hydraulic actuator and is capable of supporting loads of 250kN with maximum displacements of +/- 10cm. In order to minimize friction, the SHS45LC linear recirculating ball guides were used.
The simulation of the earthquake in the laboratory and the hardware test in the loop at the department of mechanics MECC of the Politecnico di Milano are the prelude to experimental campaign on a vibrating table #terquakeISAAC in the coming weeks at the laboratories EUCENTRE.