Lead Bridge Bearing for Earthquake Resistance

Product Details
Customization: Available
After-sales Service: Installation Guide
Warranty: 2 Years After Leaving The Factory
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  • Lead Bridge Bearing for Earthquake Resistance
  • Lead Bridge Bearing for Earthquake Resistance
  • Lead Bridge Bearing for Earthquake Resistance
  • Lead Bridge Bearing for Earthquake Resistance
  • Lead Bridge Bearing for Earthquake Resistance
  • Lead Bridge Bearing for Earthquake Resistance
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  • Overview
  • Product Description
  • Features
  • Packaging & Shipping
  • Application
  • Certifications
Overview

Basic Info.

Model NO.
Lead bridge bearing 010
Usage
Beam Bridge, Highway Bridge, Railroad Bridge, Building, Bridge Construction
Structure
Laminated Rubber Bearing
Material
Steel Bearing, Steel Structure
Activity
Multi Direction Movable Bearing
Rolling Body
Roller Bearings
The Number of Rows
Multi-Column
Outer Dimension
Medium and Large(120-190mm)
Spherical
Non-Aligning Bearings
Load Direction
Radial Bearing
Separated
Unseparated
Main Material
Rubber+Steel Structure+Lead Core
Size
Customized
Finish
Spray, Galvanized
Color
Grey, Yellow, Red
Load
Accoring to Drawing
Types
Customized
Offer
Drawing
Factory Location
Hegnshui, China
Business Type
Factory Manufacturer
Name and Mark
Jingtong Rubber
Customized
Customized
Transport Package
Plastic Bag, Then Pallet Delivery
Specification
SGS, CE
Trademark
HENGJINGGONG
Origin
Hengshui City, China
HS Code
7604299000
Production Capacity
20 Set, 12 Hours, One Production Line.

Packaging & Delivery

Package Size
40.00cm * 40.00cm * 20.00cm
Package Gross Weight
50.000kg

Product Description

Product Description

 

Description of lead bridge bearing:

Lead rubber bearing, applied to building and bridge constructions, is a practical and cost-effective choice for seismic isolation. It is composed of laminated elastomeric bearing pad, top and bottom sealing & connecting plates and lead plug inserted in the middle of the bearing as shown in the following picture.

Lead Bridge Bearing for Earthquake ResistanceLead Bridge Bearing for Earthquake ResistanceLead Bridge Bearing for Earthquake Resistance
 

Working principle

After the earthquake, the lead rubber bearing can help building restore the normal position through dynamic recovery and recrystallization of lead core and shear strain of laminated rubber bearing.

  • Vertical loading transfer process: beam → top embedded steel plate → top connecting steel plate → top sealing steel plate → laminated rubber bearing with lead core structure → bottom sealing steel plate → bottom connecting steel plate → pier.
  • Horizontal loading transfer process: pier → bottom anchor bolts → bottom connecting steel plate → top sealing steel plate and shear tenon → top connecting steel plate → top embedded steel plate → anchoring components.
Lead Bridge Bearing for Earthquake Resistance

 

Features

Features of pot bridge bearing:

Stiff and strong in vertical direction but flexible in horizontal direction.Absorb earthquake-generated force by changing the bearing's shape.Allow the buildings to retain their original shapes and position owing to the high elastic force of rubber.Capable to adjust damping amount just by changing the number of lead plugs.Excellent vertical load capacity ranging from 5 tonf to 2000 tonf.Reduce the ground acceleration by extending the structure vibration period.High durable and elasticity of the rubber part - not suffer any damages during and after earthquake.Easy to install without a separated damper.Low maintenance.With stable bilinear behavior shown as the above picture.
How does lead rubber bearing work?

During the earthquake, the un-isolated building will vibrate back and forth in varying directions due to the inertial forces and result in deformation and damages of the building. In contrast, the base isolated building will also displace but remains its original shapes and avoid damages - that is because the lead rubber bearing effectively dissipates the inertial force upon the building, extends the building's period of vibration and decrease the acceleration of the building.

The lead plug will slid with laminated rubber during earthquake but convert this energy of movement to heat so that it efficiently reduces the inertial force upon the building, which slow the vibration of the building. Meanwhile, the rubber part will preserve its original shape due to high elasticity.
 

Packaging & Shipping

Lead Bridge Bearing for Earthquake Resistance
  1. Vulcanize the rubber and reinforced steel plate together to form the laminated rubber bearing. During this process, the lead core position should be reserved in advance.
  2. Press the lead core into reserved positions and vulcanize them together.
  3. Vulcanize the top and bottom sealing steel plate.
  4. Connect the top and bottom connecting steel plate with anchor bolts.
  5. Pack the lead rubber bearing with plastic films.

Application

Lead rubber bearing, main branch of seismic isolation system, is widely applied to the large sized structures such as road bridges, rail bridges and nuclear power station to minimize damages from dynamic loads like earthquake.
 

Lead Bridge Bearing for Earthquake Resistance
Lead Bridge Bearing for Earthquake Resistance
Lead Bridge Bearing for Earthquake Resistance

 

Certifications

Lead Bridge Bearing for Earthquake Resistance
Lead Bridge Bearing for Earthquake Resistance
Lead Bridge Bearing for Earthquake Resistance
Lead Bridge Bearing for Earthquake Resistance

 

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