Underside of Curved Bridge for UNR test
Curved Bridge with Trucks on it for UNR Test
DIS Isolator
DIS Develops 3-Dimensional Low Mass Isolation
RENO, NEVADA - Dynamic Isolation Systems has developed technology RENO, NEVADA - Dynamic Isolation Systems has developed technology which provides protection against vertical accelerations in low mass applications during a seismic event.

Seismic isolation is generally engineered to protect against horizontal accelerations in an earthquake, however in certain applications, significant vertical accelerations are present as well and, until now, there has been no effective solution to minimize the resulting forces and motions.

Recently, DIS was approached by the engineers of a major hydro-electric dam project seeking protection for the dams' operational equipment, which is located atop the structure. The equipment was designed to meet IEEE 693 high performance spectra.

Engineers at DIS developed a system which provides X, Y, and Z isolation far in excess of the anticipated needs of the project. The spectral accelerations were reduced by a factor of 18, protecting the equipment against the most extreme conditions.

Dynamic Isolation Systems President, Konrad Eriksen, predicts that this technology will be very useful in protecting critical equipment. "This is exactly the solution that has been needed.' he said.

"Every project is different." Eriksen said, "We are confident that an engineering solution can be found to protect any equipment against earthquakes".
DIS Conducts Tests For NRC
Kobe, Japan. Dynamic Isolation Systems recently tested a full-size structure on the world's largest shake table in Japan. The project was conducted for the Nuclear Regulatory Commission to study ground motions at US Nuclear sites. The NRC tests clearly showed the benefits of incorporating DIS isolation systems into nuclear facilities. The accelerations were reduced by more than a factor of 3 in the building.

Tests conducted used earthquakes that are likely to occur at various nuclear facilities around the United States and some recent strong motions, including the 2011 Tohoku Earthquake.

The test facility in Kobe, Japan is a $500MM facility with the largest shake table in the world. The table is capable of replicating a Magnitude 8.0 earthquake while supporting a full-scale structure weighing up to 1000 tons.

The video shown here is of the 175% MCE test for the Vogtle site in Georgia. The peak ground acceleration for this motion was 1.6g.
DIS Viscous Wall Damper

DIS Viscous Wall Damper lowered into place
First North America Viscous Wall Damper Installed
Geary Van Ness Medical Center

The first Viscous Wall Dampers in North America, built by DIS, are being installed on the Geary Van Ness Medical Center in San Francisco. The Wall Dampers were featured on CBS SF Bay Area News channel
on Aug 17, 2015.

The Wall Dampers are being fabricated and tested in Dynamic Isolation Systems’ plant in Reno, Nevada.

For more information about Viscous Wall Dampers, contact Dynamic Isolation Systems, 775-359-3333.

To view or download the VWD Modeling guidelines - click here.