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Heng Shui Kang Qiao Rubber Co., Ltd.

Seismic Isolator, Lrb, Seismic Isolation manufacturer / supplier in China, offering Seismic Isolation Device Lead Rubber Bearing Sold to Italy, Hot Sale Lead Rubber Bearing /Isolation Device for Bridge Construction, Seismic Isolation Bearing for Bridge and Building Construction and so on.

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Seismic Isolation Device Lead Rubber Bearing Sold to Italy

FOB Price: US $150 / Piece
Min. Order: 20 Pieces
Min. Order FOB Price
20 Pieces US $150/ Piece
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Port: Tianjin, China
Production Capacity: 5000PCS Per Month
Payment Terms: L/C, T/T, Western Union

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Basic Info
  • Model NO.: KQ-LRB50
  • Usage: Earthquake Resistance
  • Model Number: Dimension 200-1500mm
  • Application: Earthquake Resistance
  • Function: Bridge Seismic Isolation, Pressure Bearing
  • Trademark: KANGQIAO
  • Specification: As Customer′s Drawing
  • Certification: ISO9001, SGS, Ce
  • Material: Rubber Bearing
  • Forming Way: Rubber Layers with Internal Steel Plates
  • Shape: Round and Rectangular
  • Product Name: Lead Core Rubber Bearing
  • Transport Package: in Pallets or Wooeden Cases
  • Origin: China
Product Description

LRB lead rubber bearing for bridges construction
Lead Rubber Bearing consist of a laminated rubber and steel bearing with steel flange plates for mounting to the structure. 90% of our isolators have an energy dissipating lead core. 
The rubber in the isolator acts as a spring. It is very soft laterally but very stiff vertically. The high vertical stiffness is achieved by having thin layers of rubber reinforced by steel shims. These two characteristics allow the isolator to move laterally with relatively low stiffness yet carry significant axial load due to their high vertical stiffness. The lead core provides damping by deforming plastically when the isolator moves laterally in an earthquake. Isolators from 200 to 1500 mm in diameter and capacities of up to 3000 tons are manufactured. Custom dimensions are available for special applications. 
The shims for isolators are cut to exacting tolerances by laser. The steel mounting plates are machined by computer controlled milling machines that give high production throughput and accuracy. Molding each bearing takes 8 to 48 hours depending on the size of the bearing. The curing phase is continuously monitored to ensure that the rubber is uniformly cured throughout the bearing. 

Seismic Isolation Device Lead Rubber Bearing Sold to Italy
Seismic Isolation Device Lead Rubber Bearing Sold to Italy
Seismic Isolation Device Lead Rubber Bearing Sold to Italy
Seismic Isolation Device Lead Rubber Bearing Sold to Italy
Seismic Isolation Device Lead Rubber Bearing Sold to Italy

Technical parameter

Vertical bearing capacity: 204kN - 21206kN

Design angle: 0.006rad and 0.008rad

Equivalent damping ratio: >10%

The displacement of the bearing: The design displacement of sliding bearing in bridge axial direction is ±100mm and ± 150mm. 

The horizontal displacement of the bridge is ±30mm, and the normal shearing strain is 1.0, and the scale of earthquake is about 2.0. 

Friction coefficient: The design friction coefficient of sliding bearing is 0.03. 

Applicable temperature range: -40ºC-60`ºC

Basic performance

1. The energy absorption capacity of lead damper

Rubber is a kind of easy pull, press and deformation material. The bearing made only by rubber will deform greatly after loading. Engineering rubber bearing is composed of multilayer thin steel plate and overlay thin rubber. Steel plate has excellent binding effect on rubber vertical deformation for its high vertical compression rigidity. LRB bearing has low tensile rigidity, which is about 1/7 ~ 1/10 of compression rigidity. 

2. The horizontal deformation capacity of LBR bearing

The steel plate can restrain the vertical deformation of rubber but has no effect on its horizontal deformation. At the same time, the lead can follow well of the deformation of bearing and absorb the seismic energy. The LRB bearing has stable horizontal property. Due to the existence of lead in LR bearing, it can limit the horizontal deformation of bearing. 

3. Durability of LRB bearing

Shock insulation rubble even after 100 years of use, it still can keep its inner rubber intact. After 10 years of use, the properties of LRB bearing are almost unchanged. 

Application& function: 

Isolator rubber bearing is applied to building and bridge construction. 

During earthquake, the base isolated building and bridges will remain its original shapes and avoid damages. Because lead rubber bearing effectively reduces the inertial force upon building, which slow the vibration.  

Seismic Isolation Device Lead Rubber Bearing Sold to Italy



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