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Seismic Isolators and Vibration Control Devices
Products for Bridges
The Mechanism of Anti-Seismic Reinforcement for Existing Bridges

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The Mechanism of Anti-Seismic Reinforcement for Existing Bridges

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)

既設の固定・可動支持構造の橋（耐震補強前）

LRB (No Joint Method)

既設の固定・可動支承を、LRBに交換する耐震補強（ノージョイント化）

Practical Examples (BM-S)

Product lineup

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

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

Bearing Plate

Stopper

A stopper is used to prevent bridges from falling

OILES Cable Vibration Damper

A viscous damper to dampen the vibration of cable-stayed bridges and other structures

Oiles 500