The application of seismic isolation devices, such as LRB or BM-S, and dampers for replacing the bearings for existing fixed or moving support structure bridges will reduce the loading on the fixed piers owing to the dispersion of seismic force to the movable piers as well.
LRB and BM-S will provide the flexible selection on resisting force characteristics in accordance with the durability of the movable bridge pier.
The high energy absorbing performance of the LRB and BM-S will reduce the seismic force and displacement.
It also provides with the simpler solution for anti-seismic reinforcement with no requirement for replacement of existing bearings.
Movable / Fixed (Existing Bridges)
LRB (No Joint Method)
Practical Examples (BM-S)
Bridge-Use Lead Rubber Bearing, LRB
Seismic isolation bearing with lead press-fitted into a laminated rubber bearing to provide damping action
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
High Performance Bearing, HPB
The sliding material has a low coefficient of friction, so this sliding bearing can withstand high surface pressures and high speeds
OILES Cable Vibration Damper
A viscous damper to dampen the vibration of cable-stayed bridges and other structures