Seismic Isolation Rubber Bearing

Seismic isolation rubber bearings are structural components designed to reduce seismic forces and horizontal displacements transmitted to bridges and buildings during earthquakes. These bearings typically include high damping rubber bearings and lead rubber bearings, each offering different energy dissipation properties. High damping rubber bearings absorb vibrations effectively, while lead rubber bearings provide high ductility, enabling quick recovery after seismic events. By introducing a flexible layer between the superstructure and foundation, seismic isolation bearings extend the vibration period of the structure, reduce acceleration, and protect structural integrity. They are widely applied in highways, railway bridges, residential complexes, hospitals, and critical infrastructure across various seismic zones and soil conditions.

Aohong is a leading manufacturer of Seismic Isolation Rubber Bearings, specifically engineered to protect bridges, buildings, and critical infrastructure from seismic impacts. Our Seismic Isolation Rubber Bearings effectively isolate structural elements, reducing earthquake-induced forces and displacements, and significantly enhance the safety and longevity of structures. Combining advanced damping and flexible rubber materials with integrated steel reinforcement, these bearings reliably dissipate seismic energy, minimizing structural damage during earthquakes.

Working Principle of Seismic Isolation Rubber Bearings

Our Seismic Isolation Rubber Bearings function by separating the superstructure from its foundation, forming a flexible isolation layer. During seismic activity, these bearings absorb horizontal movements, significantly reducing energy transfer to the structure. By extending the building’s vibration period and effectively decreasing its acceleration, our bearings ensure minimal structural deformation and prevent permanent damage.

Types and Specifications

High Damping Rubber Bearings (HDRBs)

Our High Damping Rubber Bearings feature specialized high-damping rubber compounds that deliver exceptional energy absorption with damping ratios typically ranging from 10% to 20%. These bearings effectively reduce vibration amplitudes without the need for additional dampers.

Common Specifications:

• Vertical Load Capacity: 200 kN – 10,000 kN
• Horizontal Displacement: ±100 mm to ±500 mm
• Temperature Range: -30°C to +50°C
• Shape: Round or Rectangular (e.g., Ø500 mm, 600 mm × 600 mm)

Lead Rubber Bearings (LRBs)

Our Lead Rubber Bearings integrate laminated rubber and steel plates with a central lead core. The lead core yields plastically under seismic loading, dissipating energy and swiftly returning the bearing to its original position after seismic events.

Common Specifications:

• Vertical Load Capacity: 500 kN – 15,000 kN
• Horizontal Displacement: ±100 mm to ±600 mm
• Temperature Range: -25°C to +50°C
• Shape: Round or Rectangular (e.g., Ø600 mm, 700 mm × 700 mm)

Structural Components of Seismic Isolation Rubber Bearings

• Laminated Rubber Layers: Provide flexibility and horizontal displacement capacity.
• Steel Reinforcement Plates: Ensure vertical load-bearing capability and dimensional stability.
• Lead Core (for LRBs): Enhances energy dissipation through plastic deformation.
• Protective Rubber Cover: Shields inner materials from environmental factors like ozone, UV radiation, and temperature variations.