The Well-Link Shock Transmission Unit (STU) is a temporary connection device (TCD), velocity dependent, which allows the displacement of elements of a structure in service, but rigidly connect them under shock loads caused by earthquakes or other events. Well-Link STU consists of a cylinder, a piston road and a piston through which an internal fluid flows. Unlike Fluid Viscous Damper (FVD), STU does not absorb or dissipate energy, and it is also known as lock-up device, displacement-control device or snubber, among others.
The principle of functioning of STU is to explote the force generated by flowing the internal fluid through an orifice resulting in two situations:
Service: when loads are slowly applied due to temperature changes or other causes, STU allows the structure to move freely.
Earthquake or other events: when loads are rapidly applied due to earthquake, windstorms or vehicle braking actions, STU acts as a rigid link connecting the elements of the structure.
Upon request, our Technical Department can tailor Well-Link STU with:
Load capacity: 50 – 600 ton
Stroke: 12 – 200 mm
Min activation velocity value: 2 mm/sec