Seismic Lead Rubber Bearing for Bridge Seismic Isolation System

Product Details
Customization: Available
After-sales Service: Installation Guide
Warranty: 5 Years
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  • Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
  • Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
  • Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
  • Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
  • Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
  • Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
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  • Overview
  • Product Description
  • Product Parameters
  • Detailed Photos
  • Types
  • Packaging & Shipping
  • Company Profile
  • FAQ
Overview

Basic Info.

Model NO.
JT-LRB01
Certification
GB, BS, ASTM, CE, ISO
Usage
Beam Bridge, Highway Bridge, Railroad Bridge, Building
Structure
Laminated Rubber Bearing
Material
Rubber and Steel
Activity
Fixed Bearing
Name
Seismic Lead Rubber Bearing for Construction Build
Leading Time
15days
Top Plate Shape
Square/Circle
Print Stanard
ISO Print Standard
Steel Plate Thickness
22-25mm
Customized
Customized
Transport Package
with Film on Pallet
Specification
LRB300/400/500/600/700/800/900/1000
Trademark
HENGJINGGONG
Origin
China
HS Code
40169990
Production Capacity
10000 PCS Per Year

Packaging & Delivery

Package Size
35.00cm * 35.00cm * 20.00cm
Package Gross Weight
10.000kg

Product Description

Product Description

Seismic Lead Rubber Bearing for Bridge Seismic Isolation SystemSeismic Lead Rubber Bearing for Bridge Seismic Isolation System
Lead rubber bearing
, also called lead core rubber bearing, LNR rubber bearing, has similar structure with high damping rubber bearing. It is an important component of seismic isolation bearing. It is composed of laminated rubber bearing and lead core. The lead core can not only bear the heavy load and horizontal force, but also absorb energy through plastic deformation of hysteresis damping.

Lead rubber bearing can be divided into round and rectangular shapes for different application. Additional, the lead core quantity can be single or multiple to supply maximum flexibility in the bridges or building.

Features

 

  • Stable vertical stiffness and excellent vertical loading capacity.
  • Suitable horizontal stiffness. Satisfy the earthquake vibration and normal displacement. It can enlarge the vibration cycle to 1.5 to 3 seconds.
  • Excellent damping performance.
  • Good energy dissipation capacity.
  • Adjustable lead core area. It can suit different damping ratio through adjusting wire diameter and sectional area.
  • Excellent durability, cycle fatigue resistance, acid and alkali resistance.
  • Long lifespan. 60-80 years long lifespan for durability.
  • Easy installation and replacement for lower maintenance costs.
Working principle
Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
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 rubber bearing has same mechanical properties with laminated rubber bearing. Besides, it has high damping property.      As we all know, the laminated rubber bearing has large displacement deformation in horizontal direction
    In the earthquake, this structure can separate top and bottom structure vibration, enlarge self vibration cycle and reduce seismic force. Besides, the lead core will be squeezed and yielded during the shear process to dissipate Seismic force.
    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.

Performance comparison between lead rubber bearings and ordinary rubber bearings

There are significant differences in damping performance between lead rubber bearings and ordinary rubber bearings. The damping coefficient of the former typically exceeds 15%, while that of the latter is generally below 5%. This excellent damping property allows lead rubber bearings to effectively extend the structural period of bridges and significantly reduce the acceleration response of the superstructure. Under seismic action, lead rubber bearings can significantly improve the stress state of the structure during the earthquake due to their unique mechanical properties, making them particularly suitable for being set in areas with a seismic intensity of 8 degrees or higher.
Seismic Lead Rubber Bearing for Bridge Seismic Isolation System

Product Parameters

Seismic Lead Rubber Bearing for Bridge Seismic Isolation System

Specification

  • Shear modulus: 0.8 MPa, 1.0 MPa, 1.2 MPa.
  • Working temperature range: -25 °C to +60 °C.
  • Lead core quantity: single or multiple.
  • Shape: rectangular and round.
  • Technical parameter

    • Rectangular lead rubber bearing specifications.
    • Round lead rubber bearing specifications.
No Test Item Technology Requirement Unit
1 Hardness (Shore A) 60±5 HD
2 Tensile Strength ≥ 18 MPa
3 Elongation At Break ≥ 550 %
4 Compression Set 709 °C × 24 H ≤ 30 %
5 Brittleness Temperature ≤ -50 °C
6 Ozone Aging(50 PPHM, 20% Elongation, 40 °C × 48 H) No Creak -
7 Air Aging Hardness Change (Shore A) ≤ +6 HD
Tensile Strength Chang Rate ≤ 12 %
- Elongation At Break Chang Rate ≤ 20 %
Detailed Photos

Seismic Lead Rubber Bearing for Bridge Seismic Isolation SystemSeismic Lead Rubber Bearing for Bridge Seismic Isolation System

Types
Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
Packaging & Shipping
Seismic Lead Rubber Bearing for Bridge Seismic Isolation System

 

Company Profile

Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
Hengshui Jingtong Rubber Co., Ltd., located in Hebei Province's Hengshui City, is a professional manufacturer of engineering rubber products. Our product range includes bridge bearings, expansion joints, water stop strips, water stop belts, inflatable cores, building deformation joint device and water plugs, which are widely used in bridge, tunnel, water conservancy, and power engineering projects. The company boasts advanced technology and mature processes to ensure reliable product quality.

We have a professional technical team and a comprehensive after-sales service system to ensure customers receive high-cost-performance products and attentive service. Hengshui Jingtong Rubber Co., Ltd. is committed to continuous innovation to meet market demands and looks forward to establishing long-term cooperative relationships with customers from both domestic and international markets.
Seismic Lead Rubber Bearing for Bridge Seismic Isolation System
Seismic Lead Rubber Bearing for Bridge Seismic Isolation System

FAQ

1.  MOQ?
10 pieces
2. Do you have stock?
no. But our delivery time is vert short, usually 10-15 days. we also accept rash order.
3. what's the price?
It mostly determined by the specification. Also relates to quatity that you need.
So contact me for further!
4. payment terms
T/T, LC etc.
5. Do we have quality guarantee?
Of Course!
--from raw material to manufacturing, we have rigid quality control.
--before delivery, we have strict quality inspection.
--Third party inspection is also available at your request.
--We also have ISO, CE certificates.


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