Spherical Bridge Bearing Seismic Isolation Bearings for Buildings and Bridges

Product Description

Product Description

Product Introduction
    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.

Process
Rubber mixing → Steel plate shot blasting → Adhesive coating → Alternate rubber-steel lamination → Flat vulcanization (150-160℃×60min) → Lead core pressing (for LRB) → Upper/lower connection plate assembly → Mechanical testing → Final inspection. Vulcanization pressure 18MPa ensures reliable bonding.

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%

Features
*High Vertical Stiffness: Vertical compression modulus 800-1000MPa, withstands building weight

*Horizontal Flexibility: Shear modulus 0.4-0.8MPa for effective isolation

*Large Deformation Capacity: Design shear strain ≥200%, ultimate strain ≥350%

*Excellent Durability: Anti-aging and ozone resistant, 50-year design life matching building lifecycle

*Temperature Adaptation: Stable performance from -40℃ to +60℃

Specification

Material	Steel and PTFE sliding plate.
Working temperature range	Normal type: -25 °C to +60 °C. Cold resistant type: -40 °C to +60 °C.
Friction coefficient	(In condition of PTFE layer with silicon grease lubrication and stresses about 30 MPa) Normal temperature: 0.03. Low temperature: 0.05.
Bearing horizontal force	Guided type: Horizontal force is 10% vertical bearing capacity. Fixed type: horizontal force is 10% vertical bearing capacity.
Vertical bearing capacity	1000, 1500, 2000, 2500, 3000, 4000, 5000, 6000, 8000, 9000, 10000, 12500, 15000, 17500, 2000 kN.
Displacement	In longitudinal direction 1000–2500 kN, 50/100 mm. 3000–20000 kN, 50/100/150 mm. In transverse direction: ± 40 mm.
Popular specifications	Fixed type spherical bridge bearing. Guided type spherical bridge bearing. Free sliding type spherical bridge bearing.

Detailed picture

Customer Visit

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.