Seismic Isolator Bearing Hdr High Damping Bridge Rubber Bearing for Construction

Product Description

Product Description

Bridge bearings are the critical load-transferring interface between the superstructure and the piers. Laminated from multi-layer steel plates vulcanized with rubber or assembled with spherical steel crowns and PTFE sliding sheets, they deliver vertical capacities from several meganewtons to tens of meganewtons while accommodating longitudinal expansion, rotation and lateral drift. Elastomeric shear deformation or low-friction sliding surfaces allow the deck to move freely under temperature, creep and braking loads; built-in damping layers or lead cores dissipate seismic energy, cutting peak accelerations and ensuring a "strong-yet-flexible" response.

Bridge Bearing Features
    *High-Strength Materials: Bridge bearings are made from high-quality steel and rubber materials, offering exceptional load-bearing capacity and durability.
    *Flexible Movement Capability: The design allows for a certain degree of displacement in both horizontal and vertical directions, accommodating structural deformation.
    *Excellent Seismic Performance: Bridge bearings effectively resist seismic loads, enhancing the safety of the bridge.
    *Easy Maintenance: The simple structural design facilitates routine inspection and maintenance, reducing long-term operational costs.

Bridge bearings serve as the "joints" between bridge spans and piers, constructed from composite materials such as rubber, steel plates, or polytetrafluoroethylene. They reliably transmit loads of tens of thousands of tons while allowing bridges to freely expand, contract, and rotate. They inherently possess wear resistance, corrosion resistance, and vibration damping properties. Easy to install and replace, they offer full-life-cycle cost efficiency. As core functional components, they ensure the bridge's safety, durability, and smooth vehicle operation under various loads and deformations.

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.

Specification

Parameter Name	Unit	Specification Range
Damping Ratio	%	≥12
Load Capacity	kN	As per design requirement
Vertical Stiffness	kN/m	As per design requirement
Horizontal Stiffness	kN/m	As per design requirement
Vertical Compression Deformation	mm	≤10
Horizontal Deformation	mm	≤30
Durability	-	Fatigue life over 20 million cycles
Temperature Range	℃	-40 to +70

Advantages

Superior Load-Bearing Capacity: Bridge bearings can support heavy traffic loads, ensuring the stability and safety of the bridge structure.

Superior Load-Bearing Capacity: Bridge bearings can support heavy traffic loads, ensuring the stability and safety of the bridge structure.

Wide Applicability: Suitable for highway bridges, railway bridges, tunnels, and other large structures, meeting diverse support requirements.

Detailed picture

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.