Vibration-controlled Bridges - OILES CORPORATION

What is a vibration-controlled bridge?

A vibration-controlled bridge uses a vibration control device to suppress the displacement response of and the forces acting on structural members even in the event of a major earthquake.

Differences among seismically isolated bridges, vibration-controlled bridges, and load-dispersing bridges

Laminated rubber (isolator)

The ability to bear a load and absorb rotation

Rubber reinforced with steel plates firmly supports the bridge.

Compared to rubber alone, it is more rigid in the vertical direction and it provides stable support for a structure.

Bearing a load

An overview of vibration control technology

Diagram of a vibration-controlled bridge

Dampers have two major roles. These are “damping” and “redirection” of energy. When dampers are installed between the upper and lower structures, damping reduces the seismic inertia force transmitted to the lower structure and it suppresses the displacement of the upper structure. Redirection of energy allows the horizontal force on the lower structure to be adjusted as desired.

Product lineup

Bridge-Use Lead Rubber Bearing, LRB

Lead is press-fitted into a laminated rubber bearing to provide a seismic isolation bearing that dampens vibrations

Bridge-Use Rubber Bearing, RB

A bearing with alternating layers of rubber and steel plates that disperses horizontal force

Bingham Material-Stopper, BM-S

A cylindrical damper that uses the flow resistance of a special filler