Leading Rubber Bearing Seismic Isolation Bridge Bearing with Lead Plug for Sale

• Customization: Available
• After-sales Service: 5years
• Warranty: 5years
• Model NO.: JT/T8
• Certification: GB, BS, ASTM
• Usage: Beam Bridge, Highway Bridge, Railroad Bridge
• Structure: Pull Pressure Bearing
• Material: Lead Bearing
• Activity: Multi Direction Movable Bearing
• Application: Building, Bridge, Highway Bridge
• Shape: Round, Rectangular
• Lead Core: Dia150/170/230mm etc..
• package: Pallet by PE Film
• QA: Factory Test Report
• Transport Package: in Bag, on Pallet
• Specification: color: black, orange, etc.
• Trademark: HengJingGong
• Origin: Hebei, China
• HS Code: 40169990
• Production Capacity: 10000
• Package Size: 50.00cm * 50.00cm * 30.00cm
• Package Gross Weight: 100.000kg

Product Description

Product Description

The Seismic Isolation Rubber Bearing is an advanced structural component widely used in buildings and bridges to mitigate the destructive effects of earthquakes, strong winds, and other dynamic loads on structures. This product is manufactured by alternately laminating thin steel plates and rubber layers, bonded together through high-temperature and high-pressure vulcanization. Its core principle is to effectively dissipate seismic energy by extending the structure's natural vibration period and increasing damping, thereby significantly reducing the seismic force transferred to the upper structure (isolating approximately 80% of the seismic force). This greatly enhances the structural seismic performance, protecting buildings and ensuring human safety.

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.

Working principle

    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.

Function
    *Effective Seismic Isolation: Extends the structural period to avoid the predominant seismic period, significantly reducing the seismic response of the upper structure.
    *Energy Absorption: Efficiently dissipates seismic energy through hysteretic deformation (plastic deformation of the lead core or internal friction of high-damping rubber).
    *Load Support: Provides high vertical load-bearing capacity and stiffness to stably support the weight of the upper structure.
    *Displacement Adaptation: Allows significant horizontal shear deformation to accommodate movements caused by temperature changes, shrinkage, and other factors.

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.

Rectangular lead rubber bearing.

Round lead rubber bearing.

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

Type

Product Details

Applications
This product is suitable for various buildings and infrastructures requiring enhanced seismic performance:

    *Lifeline Projects: Schools, hospitals, elderly care facilities, emergency command centers, and broadcasting centers.
    *Public and Commercial Buildings: Museums, stadiums, airport terminals, shopping malls, and office buildings.
    *Industrial Facilities: Nuclear power plants, LNG storage tanks, and chemical plants.
    *Transportation Infrastructure: Highway bridges, railway bridges, and overpasses.
    *Seismic Retrofitting of Historical Buildings and Prefabricated Building Structures.

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 esta  blishing long-term cooperative relationships with customers from both domestic and international markets.

FAQ

1.When can I get the quotation?
A:We usually quote within 24 hours after we get your inquiry.

2.How long can I expect to get the sample?
A:The samples will be ready for delivery in 5-10days. The samples will be sent to you via express and arrive in 5-7days.

3.How long is the delivery time
A:Usually 10-15 days, depending on the quantity purchased.

4.How can I get a sample to check your quality?
A:After negotiating the price, we will provide you with samples for testing.

5.what can you buy from us?
Bridge Bearing Pad,Seismic isolation bearing,Expansion Joint,Rubber Inflatable Airbag,Waterstop Belt/Strip,Steel Expansion Joint,Butyl Tape

6.What's payment term?
A:T/T, L/C at sight, Western Union

7. 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.