Lead rubber bearing is based on general laminated rubber bearings, pouring the lead into the bearing center, which is seismic bearing damping performance improvement of rubber bearings. By changing the lead core section size of the bearings, lead rubber bearing can change the effective level of equivalent stiffness and equivalent damping ratio.
Products comply with :JT/T822-2011 Lead rubber bearing isolator for highway bridge and GB 20688.3-2006
How does lead rubber bearing work?
During the earthquake, the un—isolated building will vibrate back and forth in varying directions due to the inertial forces and result in deformation and damages of the building. In contrast, the base isolated building will also displace but remains its original shapes and avoid damages - that is because the lead rubber bearing effectively dissipates the inertial force upon the building, extends the building’s period of vibration and decrease the acceleration of the building.
The lead plug will slid with laminated rubber during earthquake but convert this energy of movement to heat so that it efficiently reduces the inertial force upon the building, which slow the vibration of the building. Meanwhile, the rubber part will preserve its original shape due to high elasticity.
Stiff and strong in vertical direction but flexible in horizontal direction, i Absorb earthquake-generated force by changing the bearing’s shape, i Allow the buildings to retain their original shapes and position owing to the high elastic force of rubber, i Capable to adjust damping amount just by changing the number of lead plugs.
Excellent vertical load capacity ranging from 5 tons to 2000 tons, i Reduce the ground acceleration by extending the structure vibration period.
High durable and elasticity of the rubber part 一 not suffer any damages during and after earthquake.
Easy to install without a separated damper.
With stable bilinear behavior shown as the above picture.
Lead Rubber Bearing from 400mm MOOmm to 1750mm*1750mm with capacities of up to 4,000 tons are manufactured. Custom dimensions are available for special applications.
The product has been successfully used in a board range of applications which include: bridge, viaducts, high rise buildings, stadium and dams.
Please contact with:Albert Lu
Mobile & WhatsApp: +8615832830068
Tel & Fax: +863185230068
Add: YAMAO BUILDING, WEST HELPING ROAD, HENGSHUI, HEBEI, CHINA