HDRB High Damper Rubber Bearing

◆◆ The characteristics of high damping rubber bearings are as follows:

1. Integration of vertical bearing capacity, horizontal restoring force, and damping (energy absorption) in one.

2. The hysteretic behavior (load-deformation curve) of the bearing is full, with significant energy dissipation.

3. With improved rubber formulation, the equivalent damping ratio can reach more than 12%.

4. Low maintenance and management costs (no need for additional damping devices).

5. Minimal residual deformation after a major earthquake, no need for replacement.

6. The surface of the high damping bearing is covered with a rubber protective layer, which protects the internal rubber from ozone and ultraviolet radiation, resulting in better aging resistance. The equivalent damping ratio decreases by less than 2% over 50 years.

7. HDR high damping rubber has low temperature dependence, making it widely used in different climatic regions.

8. Similar to natural rubber, HDR high damping rubber has excellent creep performance.

9. Environmentally friendly and non-polluting.

10. High damping isolation rubber bearing is a new type of isolation bearing with energy dissipation performance.

11. High damping rubber bearings not only possess all the properties of板式支座 (plate-type bearings) but also have excellent isolation performance, which can effectively reduce the damage to bridges caused by earthquakes.

12. The hysteretic curve of high damping rubber bearings is relatively full, with good energy dissipation effect, and their energy dissipation capacity does not show a decreasing trend after multiple cyclic loadings.

◆◆ Application Fields of HDR High-Damping Isolation Rubber Bearings

1. Bridge Engineering

HDR high-damping isolation rubber bearings can be applied to various types of highway bridges, such as beam bridges, arch bridges, cable-stayed bridges, and suspension bridges. Installing these bearings between the bridge piers and the bridge span structure can absorb and dissipate seismic energy, reduce the impact of seismic forces on the bridge structure, protect the structural safety of the piers, and ensure the rapid recovery of highway traffic after an earthquake.

2. Building Construction

In high-rise and super high-rise buildings, as well as residential areas and residential buildings, HDR high-damping isolation rubber bearings can be placed between the foundation and the superstructure of the building. They effectively isolate the energy transmission of seismic waves, reduce the shaking and damage of the building during an earthquake, and ensure the safety of personnel and the normal use function of the building.

3. Industrial Buildings

Important industrial plants, such as chemical plants, electronics factories, and machinery factories, have high requirements for the seismic performance of buildings. HDR high-damping isolation rubber bearings can provide stable vertical bearing capacity and horizontal restoring force, while consuming seismic energy through damping effects to protect the structure and equipment safety of industrial plants.

4. Cultural and Sports Facilities

Cultural and sports facilities such as museums, libraries, and gymnasiums usually have important cultural value or functional needs. HDR high-damping isolation rubber bearings can provide them with excellent seismic performance, ensuring safety and stability during natural disasters such as earthquakes.

5. Special-Function Buildings

Buildings with special functional requirements, such as hospitals, railway stations, and airports, need to ensure their normal operation during an earthquake. For example, installing HDR high-damping isolation rubber bearings in hospital buildings can reduce the vibration of medical equipment during an earthquake, ensuring that these devices can be quickly put into use after the earthquake to provide timely medical treatment for the injured. In railway station and airport buildings, these bearings can protect the safety of building structures and facilities, ensuring the normal operation of transportation.

6. Special Environment Areas

HDR high-damping isolation rubber bearings can also be applied to areas with special environmental requirements, such as expressways, high-tech industrial parks, and national nature reserves. These areas have high requirements for the seismic performance and environmental protection of buildings, and HDR high-damping isolation rubber bearings can meet these requirements and provide stable and reliable isolation effects.

◆◆ The installation process of high-damping rubber bearings can be divided into the following detailed steps:  

1. Before installing the high-damping rubber bearings, an inspection of the bearings is required. This includes verifying that the corresponding pier/abutment position of the bearing matches its specifications, checking whether the connection status of the bearing is normal, inspecting the identification and installation direction of the bearing, and ensuring that the upper and lower surfaces of the bearing that are in close contact with concrete or cement mortar are clean and free of dust and oil stains.  

2. During the installation process, grouting materials, usually non-shrink epoxy resin mortar, need to be used to ensure a tight connection between the bearing and the pier/abutment. Before grouting, the upper surface of the bearing pad stone should be chiseled to expose the aggregate, and debris in the pre-reserved holes should be removed. Then, the mortar is poured into the pre-reserved holes through grouting pipes, and a vibrator is used to compact the mortar to eliminate air bubbles, ensuring that all gaps are fully filled with mortar.  

3. After grouting is completed, curing of the bearing is required to ensure that the mortar can fully harden. During the curing period, the surface of the mortar should be kept moist, and vibration or impact should be avoided. The curing time is usually 7 days, but it may need to be extended in cases of low temperature or high humidity.  

4. After completing the above steps, the installation quality of the bearing needs to be inspected. The inspection contents include checking whether the position, elevation, and levelness of the bearing meet the design requirements, and whether the grouting material is fully filled and hardened. If any problems are found, adjustments or repairs should be made in a timely manner.

1. What are your main products?

Our main products include:  Anti-Seismic Flexible Pipelines ；Bridge Bearings  Bridge Expansion Joints ；Sealants ； Waterstops ；

2. Can you provide customized products?

Absolutely! We offer tailored solutions based on your project’s specific requirements, covering everything from material selection (such as NBR, EPDM, and more) to structural design. All custom orders come with detailed technical drawings and professional installation guides to ensure seamless implementation.

3. What certifications does your company possess?

We hold ISO certifications for quality, environmental, and occupational health management systems, ensuring strict compliance with GB/T 17955-2019 and other national standards.

4. Do you offer installation support?

Yes, we provide after-sales support, including remote video guidance for installation.