Viscous fluid damper H-SAFE : VD , STU

AGOM antiseismic hydraulic devices, called H-Safe, are basically composed by a cylinder filled by silicon fluid with a movable piston; controlling the fluid flow from one side of the piston to the other it is possible to obtain the required device response law. The hydraulic device response is governed by the velocity and it reacts to the imposed relative movement between its connection points that could be between structure and ground or between two internal nodes of a structure. In general the device is connected to the structure by pins and spherical hinges to allow installation adjustments, structure service rotations and to avoid unwanted parasite bending effects of the piston. Hydraulic seismic devices type VD act as force control devices (VD = Viscous Damper): for slow motion, they give a negligible reaction, in case of fast motion they reaches the target force keeping the force level stable but allowing the movement to dissipate the energy imposed to the structure by the external excitation. They allow to reduce the forces into the structure and to mitigate vibrations and accelerations by damping effect due to energy dissipation.