The Multi Unit Friction Damper is Damptech's signature damper, used in many configurations. The V-Bracing was first entrusted to protect two sacred temples in Japan in 2001, using Damptech's original patented rotational damper. Now we use high capacity dampers in V-shaped Bracing in steel, concrete or wood structures, both new build and retrofit.
How the damper works:
When a lateral external force excites a frame structure with a large force, the top of the frame structure starts to displace horizontally due to this force. The V-bracing system and the frictional forces developed between the frictional surfaces of steel plates and friction pad materials will resist the horizontal motion.
See Video Below:
When the frame structure is moved to the right the right damper is lengthened while the left damper is shortened and the dampers dissipate energy. During an earthquake a frame structure in a building will be moved from left to right repeatedly and thus dissipating energy as the dampers are lengthened and shortened.
The movement of a single damper device when the frame structure is displaced to the maximum horizontal displacement can be seen in the figure here.