LNR Horizontally Force-Dispersed Rubber Bearings: Advanced Bridge Isolation Solution
LNR horizontally force-dispersed rubber bearings are a patented innovative bridge component, engineered to address the critical limitations of traditional plate rubber bearings for highway and municipal bridges. Compliant with GB 20688.2-2006 and European EN standards, these bearings are ideal for seismic intensity zones of 7-degree (0.10g) and below, excelling in curved bridges, wide spans and interchange ramps where horizontal force distribution is paramount.
Crafted from vulcanized natural rubber and laminated stiffened steel plates with a robust rubber protective layer, LNR bearings come in two core types: fixed (LNR) and sliding (LNR(H)), available in circular and rectangular shapes. Fixed bearings leverage rubber shear deformation (ultimate shear strain 250%) for force dispersion, while sliding variants integrate PTFE-stainless steel friction pairs (static friction coefficient ≤0.03) to accommodate large horizontal displacements (±100/150mm), with cold-resistant options for -40℃ to +60℃ environments.
Their defining advantage is pier coordinated stress, which evenly distributes horizontal forces from earthquakes, temperature changes and braking, eliminating single-pier stress concentration and reducing curved bridge pier stress imbalance by over 30%. The optimized anchoring structure-sleeve-bolt for fixed, rebar-weld for sliding-ensures reliable connection with bridge superstructures and substructures, preventing slip or detachment, while the high-quality rubber delivers excellent reset performance with no residual deformation after shear.
Engineered for durability, the heavy-duty rubber coating resists ozone, UV and corrosion, and the modular design enables easy installation, pre-assembled embedded components and straightforward maintenance. Regular inspections and 2-year anchor oiling ensure long service life, with simple replacement procedures that minimize traffic disruption.
Beyond standard specifications, customizable bearing capacity, displacement and dimensions are available to meet project-specific needs, supported by professional technical guidance and 24-hour after-sales service. As a cost-effective, high-performance isolation solution, LNR bearings redefine bridge structural reliability, ensuring safe, stable and long-term operation for modern bridge infrastructure worldwide.
