Seismic Isolation and Vibration Control Sliding System

To improve the seismic performance of a bridge as a whole, increase its long-term durability, and reduce construction costs

What is seismic isolation and vibration control sliding system?

Definition

“A system that uses seismic isolation bearings and vibration dampers in the substructure of specific spans to control the behavior of a multi-span continuous girder bridge that is unlikely to collapse during an earthquake. Sliding bearings are installed between abutments to isolate the superstructure and substructure. This seismic-resistant structure is less susceptible to statically indeterminate forces caused by temperature changes and other factors.

Effects

No need to adjust horizontal displacement during construction, e.g., post-sliding
Reduces the effects of statically indeterminate forces due to temperature changes and other factors on the seismic performance of bridges
Reduces seismic inertia with a longer period than that of the bridge
Use of low-friction sliding bearings in footings enables slimming down of footing columns and foundation piles
Seismic isolation bearings and vibration dampers can provide significant damping performance

How the seismic isolation and vibration control sliding system works

A seismic isolation and vibration control sliding system provides a combination of seismic isolation, sliding, and vibration control in a single bridge.

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

High Performance Bearing, HPB

A sliding bearing that is more compact due to the lower friction and higher surface pressure of the sliding material.

Bingham Material-Stopper, BM-S

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