9D System | 2 shake-tables

Developed as part of the “Dipartimenti d’Eccellenza” project of the Scuola Universitaria Superiore di Pavia (IUSS), the 9D system is a unique tool for real-time seismic analysis of non-structural elements. It consists of a six-degree-of-freedom shake-table at the base, supplemented by a three-degree-of-freedom vibrating table placed four metres up, enabling the simulation of two consecutive floors of a building.

Unlike conventional systems with a single base table, this innovative configuration realistically reproduces the effects of an earthquake at any height in a structure by subjecting specimens to simultaneous acceleration and inter-storey deformation movements. This enables the seismic behaviour of non-structural elements such as infills, false ceilings, suspended plant, pressurised piping, air handling units, industrial shelving and server racks to be studied with an unprecedented level of fidelity.

Technical Details

DoF at the top 3
DoF at the base 6
Tables sizes at the top 5.00 m x 7.00 m
Tables sizes at the base 4.80 m x 4.80 m
Displacement capacity in x e y 1 m
Displacement capacity in z 0.140 m
Peak horizontal velocity at the top 3 m/s
Peak horizontal velocity at the base 2 m/s
Interstorey displacement in the longitudinal direction ± 1.7 m
Interstorey displacement in the transversal direction ± 1.1 m
Actuators 14