High Damping Rubber Bearing for Bridge Vibration Isolating Rubber Bearing

• Customization: Available
• After-sales Service: Technical Guidance
• Warranty: 2 Years After Leaving The Factory
• Model NO.: JT125ER
• Certification: BV, CE, ISO, SGS
• Usage: Beam Bridge, Highway Bridge, Railroad Bridge, Bridge Construction
• Structure: Laminated Rubber Bearing
• Material: Steel Structure
• Activity: Multi Direction Movable Bearing
• Main Material: High Damping Rubber Bearing for Jingtong Quality J
• 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.
• Package Size: 30.00cm * 30.00cm * 20.00cm
• Package Gross Weight: 60.000kg

Product Description

Product Description

    Seismic isolation rubber bearing is the core component of building isolation systems, installed between foundation and superstructure. It extends structural natural period through horizontal flexibility to avoid seismic frequency bands, while utilizing damping energy dissipation to significantly reduce seismic energy transmission (50%-80% reduction). This effectively protects building structures and interior facilities, representing a major development direction in modern seismic technology.

Material
    Premium natural rubber (NR) or high damping rubber (HDR) as base material, hardness 50±5 Shore A, tensile strength ≥18MPa. Embedded reinforcement: Q355B steel plates, 3-12mm thick, hot-dip galvanized or rubber-coated for corrosion protection. Lead core: 99.9% pure lead (lead-rubber type only). Bonding system ensures rubber-steel peel strength ≥8kN/m.

Product Types

*Laminated Natural Rubber Bearing (LNR): Damping ratio ≈5%, for low seismic intensity zones

*Lead Rubber Bearing (LRB): Built-in lead core, damping ratio 20%-25%, most widely used

*High Damping Rubber Bearing (HDR): Special rubber formula, damping ratio 15%-20%, lead-free and eco-friendly

*Frictional Pendulum System (FPS): Curved sliding design with strong self-centering capability

*Hybrid Bearing: Rubber + FPS combination for large displacement applications

Working principle

During earthquake, the vibration from various directions will impact fixed base building and results in deformation and building or bridge damages. The high damping bearing pad is improved through high damping material, which the damping ratio can approach to 15% to 18%.

When the earthquake comes, the high damping rubber bearing will increase the horizontal displacement through rubber shear deformation and reduce friction coefficient. The large displacement can weaken the vibration from all direction and reduce the damage of building and bridges.

Functions
    *Period Extension: Horizontal stiffness 0.5-2.0kN/mm, extends structural period by 2-3 times

    *Energy Dissipation: Full hysteresis loops with equivalent damping ratio 15%-25%

    *Load Support: Vertical capacity 500-30,000kN, stably supports superstructure

    *Self-centering: Automatically returns to initial position, residual deformation <5%

    *Displacement Limiting: Limit device activates at large deformation to prevent falling off

Specification

Characteristics		Requirements
G Modulus (MPa)		0.7	0.9a	1.15
Tensile strength (MPa)	Moulded Test Piece	≥16	≥16	≥16
	Test Piece From Bearing	≥14	≥14	≥14
Minimum Elongation at Break (%)	Moulded Test Piece	450	425	300
	Test Piece from Bearing	400	375	250
Minimum Tear Resistance (kN/m)	CR	≥7	≥10	≥12
	NR	≥5	≥8	≥10
Compression Set (%)	CR 24 h, 70 °C	≤15
	NR 24 h, 70 °C	≤30
Accelerated Ageing (Maximum change from unaged value)
Hardness (IRHD)	NR 7d, 70 °C	-5+10
	CR 3d, 100 °C	±5
Tensile strength (%)	NR 7d, 70 °C	±15
	CR 3d, 100 °C	±15
Elongation at break (%)	NR 7d, 70 °C	±25
	CR 3d, 100 °C	±25
Ozone Resistance	Elongation: 30%, 96 h	No cracks
	40±2 °C
	NR 25 pphm
	CR 100 pphm

Installation

Product Details

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.