Since the outer and inner layers of the steel plates connect to different stories of the structure, the drifting between stories due to wind or earthquake will cause the steel plate to move to opposite direction. Thus, the viscoelastic material between the steel plates will be forced to deform and dissipate the energy. Viscoelastic material was initially designed for vibration control in the aerospace industry. When the viscoelastic material deforms, the kinetic energy is transformed to strain energy and heat, which is then dissipated.

Upon request, our Technical Department can tailor KVM VD with:

Max Out-Put Force: 1,000 kN
Max Displacement: 60 mm

1. Efficient energy dissipation capacity.
2. High reliability and stable hysteresis loops.
3. Low temperature dependence.
4. Cost and space reduction.
5. Easy installation and free maintenance.
6. Long durability.

The KVM VD has been applied both for seismic hazard mitigation of new buildings and for seismic retrofitting of existing buildings. It can be installed in steel or reinforced concrete structures through bolted connection.

Steel plate:
ASTM A709 Gr.50 or equivalent

Viscoelastic material:
High-damping rubber

The high damping rubber does not bounce because it transfers potential energy to heat energy. When impact forces act on the high damping rubber, the molecular interactions convert potentially damaging forces to heat energy via the frictional force.

Anchor bolts:
ENV 1993-1-1GR. 10.9 or above

Corrosion protection:
Metal parts directly exposed to the ambient are protected by unsealed/sealed zinc coating with a dry film thickness of 160μm as per ISO14713