Dynamic load test simulating an earthquake. Seismic isolation devices: Steel Damper. It utilizes the elasto-plasticity property of steel. The hysteretic loop contributes to energy dissipation. There are two types of steel dampers, one is square in section and other is round in section of the rods. What is seismic isolation? “Seismic isolation” is a method of protecting a building from major earthquakes. “Isolators” are installed between a building and the ground to reduce vibrations that transmi