ABSTRACT
Viscous Wall Damper (below VWD) is a wall shaped damper using viscous material and is mainly used in steel frame structures. It is set between the upper and lower beams of a building. A VWD is a damper using viscous resistance where the resistance plate of the entire viscous fluid moves due to the relative displacement between the upper and lower beams of the building which occurs due to wind or earthquakes. In Japan, it is used in approximately 90 buildings since it was put up for sale in 1993. Out of these, about 70 steel framed buildings have been constructed and about 6,000 base VWDs are used in all.
