Lead rubber bearing

Lead Rubber Bearings (LRB) are advanced seismic isolation devices engineered to protect bridges, buildings, and other critical structures from earthquake damage by minimizing vibrations and dissipating seismic energy. These bearings are made of alternating layers of natural or neoprene rubber and reinforced steel plates, with a lead core securely embedded in the center. The rubber layers provide flexibility and allow controlled horizontal movement, while the steel plates ensure high vertical load-bearing capacity. During seismic events, the lead core undergoes plastic deformation, absorbing and converting seismic energy into heat, which reduces structural acceleration and lengthens the vibration period. Widely applied in highway bridges, railway systems, high-rise buildings, and essential infrastructure, lead rubber bearings offer superior load distribution, long-lasting durability, and cost-effective seismic protection.

Features of Lead Rubber Bearings

• High Damping Performance: Damping ratio up to 30%, much higher than ordinary rubber bearings.

• Excellent Vertical Load Capacity: Supports 5 tons to 2000 tons while maintaining horizontal flexibility.

• Energy Dissipation: Lead core absorbs seismic energy through plastic deformation.

• Durability & Low Maintenance: Resistant to aging, corrosion, and fatigue under repeated loads.

• Seismic Isolation Efficiency: Reduces ground acceleration by extending the structural vibration period to 1.5–3.0 seconds.

• Temperature Resistance: Operates reliably in temperatures from -25 °C to +60 °C.

• Convenient Installation: No separate damper is required, making it ideal for space-constrained structures.

Round lead rubber bearingRectangular lead rubber bearing