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.

Aohong is a professional manufacturer of Lead Rubber Bearings, providing high-performance seismic isolation solutions for bridges, buildings, and critical infrastructure. Lead Rubber Bearings (LRB) are composed of alternating layers of natural or neoprene rubber and reinforced steel plates, with a 99.9% pure lead core embedded in the center. The rubber layers offer flexibility and allow horizontal movement, while the steel plates provide high vertical load capacity. The lead core deforms plastically during seismic events, absorbing and converting kinetic energy into heat, which reduces structural acceleration and prolongs the vibration period. Known for durability, excellent damping, and maintenance-free operation, these bearings are widely used in highway bridges, railway bridges, high-rise buildings, and nuclear power plants to minimize earthquake damage and extend service life.

Structure of Lead Rubber Bearings

Lead Rubber Bearings are designed as laminated rubber pads combined with a central lead core for enhanced energy dissipation.

• Standard Type: Natural or chloroprene rubber with steel reinforcement.
• Sliding Type: Laminated rubber with Teflon plates for larger displacement.
• Shapes: Round and rectangular to suit different structural requirements.
• Lead Core: Single or multiple cores can be used, depending on design loads and damping requirements.

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.