Seismic Isolation Bearing Lrb Lead Rubber Bearing for Bridge and Building

• Customization: Available
• After-sales Service: Technical Guidance
• Warranty: 2 Years After Leaving The Factory
• Model NO.: JT-SIBP-02
• Certification: GB, CE/ISO
• Usage: Beam Bridge, Highway Bridge, Railroad Bridge, Building
• Structure: Laminated Rubber Bearing
• Material: Steel Bearing
• Activity: Multi Direction Movable Bearing
• Application: Building Base Structure
• Surface Treatment: High Temperature Premolding
• Technics: High Temperature Premolding
• Type: Construction Seismic Rubber Products
• Component: Reinforcing Plates, Top and Bottom Plate
• Elongation at Break: ≥450%
• Hardness: 45±5 Shore a
• OEM: Acceptable
• Standard: En 15129, En 1337, En 10025, En 12944
• FPC Test: 30~100%
• Type Test: Available
• Transport Package: Plastic Bag, Pallet, Container
• Specification: LRB 400/450/500/550/600/650/700750/800/900/1000
• Trademark: HengJingGong
• Origin: China
• HS Code: 40169990
• Production Capacity: 100 Sets/Week
• Package Size: 25.00cm * 25.00cm * 15.00cm
• Package Gross Weight: 50.000kg

Product Description

Product Description

Lead Rubber Bearing – Excellent in Absorb Energy Dissipation and Seismic Isolation

    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.

Function of lead core bearing pad

*Top and bottom plates: transfer loading and constraint deformation of lead core.
*Lead plug: dissipate energy and decrease displacement.
*Steel reinforcing plates: increase vertical stiffness and constraint deformation of lead core.
*Internal rubber layers: support structure weight, accommodate rotation and displacement, recovery moving bearing to the original position.
*Rubber cover: protect reinforced steel plates and rubber layers.

Material

    The bearing primarily uses Natural Rubber (NR) or specially formulated synthetic rubber (such as high-damping rubber). Internal thin steel plates serve as reinforcement skeletons to provide sufficient vertical stiffness and load-bearing capacity. Some models (e.g., lead-rubber bearings) incorporate a pure lead core plug at the center to offer higher damping and initial stiffness.

Features

*High Damping Performance: HDR and LRB bearings can achieve an equivalent damping ratio of 10% to 20% or higher, offering remarkable energy dissipation.
*Self-Centering Capability: Exhibits excellent elastic recovery after earthquakes, minimizing residual structural deformation.
*Strong Durability: The product is resistant to aging, fatigue, and harsh weather conditions, with a long design service life comparable to that of the building structure.
*Eco-Friendly Design: HDR bearings do not use lead, avoiding heavy metal pollution and aligning with green building principles.

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	%

Installation

Product Details

Bridge bearings are widely used for:
    *Highway, urban viaduct, LRT and heavy-haul railway concrete or steel box-girder supports;
    *Main-tower lower cross-beam and girder connections of long-span cable-stayed, suspension and continuous rigid-frame bridges;
    *Curved, graded and skew bridges requiring special tapered bearings or spherical steel bearings;
    *Seismic zones ≥ magnitude 7 where isolated bearings enhance bridge resilience;
    *Existing bridge lifting and bearing replacement projects, minimizing road closure time with rapid-exchange systems.

Packaging & Shipping

Company Profile

    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.

FAQ

1. who are we?
We are based in Hebei, China, start from 2013,sell to Domestic Market(40.00%),Southeast Asia(23.00%),Africa(16.00%),North America(7.00%),South America(7.00%),Western Europe(7.00%). There are total about 51-100 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Bridge Expansion Joint,Rubber Waterstop,Swelling Waterstop Strip,Seismic Isolation Bearing,Rubber Bearing Pad

4. why should you buy from us not from other suppliers?
1.More than 20 professional senior technical personnel.
2.There are 10 series,over 200 species and more than 2,000 specifications.
3.All products have been authenticated by the Ministry of Communications.
4.Self-research and development,professional.

5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES;
Accepted Payment Currency:USD,CNY;
Accepted Payment Type: T/T,L/C,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Chinese