Bridge & Road base isolation lead rubber bearing   

The lead rubber bearing is pressed into the lead core at the center of the RB support
Constitutive. After the lead core is pressed in, the rubber bearing is integrated into the shearing deformation, and the support is a damping device composed of a rubber bearing stabilizing device and a lead energy absorption device. Lead is a kind of metal with good plastic deformation ability and energy absorption capacity. Lead rubber bearing is one of the earliest bearings used in isolation structures. Because of its excellent mechanical properties, simple structure and high cost performance, lead rubber bearing has been widely used in engineering.


Feature:

1.Stiff and strong in vertical direction but flexible in horizontal direction.
2.Allow the buildings to retain their original shapes and position owing to the high elastic force of 
rubber.
3.Capable to adjust damping amount just by changing the number of lead plugs.
4.Excellent vertical load capacity ranging from 5 tons to 2000 tons.
5.Reduce the ground acceleration by extending the structure vibration period.
6.High durable and elasticity of the rubber part - not suffer any damages during and after earthquake.
7.Easy to install without a separated damper.
8.Low maintenance.
9.Stable bilinear behavior.




Technical parameter:

Vertical bearing capacity: 204kN - 21206kN

Design angle: 0.006rad and 0.008rad

Equivalent damping ratio: >10%

The displacement of the bearing: the design displacement of sliding bearing in bridge axial direction is ±100mm and ± 150mm.

The horizontal displacement of the bridge is ±30mm, and the normal shearing strain is 1.0, and the scale of earthquake is about 2.0.

Friction coefficient :the design friction coefficient of sliding bearing is 0.03.

Applicable temperature range: -40ºC-60`ºC
 

Basic performance

1. The energy absorption capacity of lead damper

Rubber is a kind of easy pull, press and deformation material. The bearing made only by rubber will deform greatly after loading .Engineering rubber bearing is composed of multilayer thin steel plate and overlay thin rubber. Steel plate has excellent binding effect on rubber vertical deformation for its high vertical compression rigidity. LRB bearing has low tensile rigidity, which is about 1/7 ~ 1/10 of compression rigidity.

2.The horizontal deformation capacity of LBR bearing
The steel plate can restrain the vertical deformation of rubber but has no effect on its horizontal deformation. At the same time, the lead can follow well of the deformation of bearing and absorb the seismic energy. The LRB bearing has stable horizontal property. Due to the existence of lead in LR bearing, it can limit the horizontal deformation of bearing.

3. Durability of LRB bearing 

Shock insulation rubble even after 100 years of use, it still can keep its inner rubber intact. After 10 years of use, the properties of LRB bearing are almost unchanged.

Packag & Delivery
PP Film pack on pallet , PP Belt reinforced 
For Elastomeric Neoprene rubber bridge support bearing with steel plates
Delivery Time:10-20 days after deposite


Advanced Testing Equipment:

FAQ:

Q 1:How do base isolators work?

Answer:Base isolation is a technique developed to prevent or minimise damage to buildings during an earthquake. It has been used in New Zealand, as well as in India, Japan, Italy and the USA.

A fixed-base building (built directly on the ground) will move with an earthquake's motion and can sustain extensive damage as a result.

When a building is built away (isolated) from the ground, resting on flexible bearings or pads known as base isolators, it will only move a little or not at all during an earthquake.

Q 2: How can I get some samples? 
A: We can provide you the samples but need you to pay the charges.

Q 3:What is the lead time?
A: Sample Order: 1-3 days after receipt of the full payment. 
B:OEM Order:   15-30days after receipt of the deposit.


Contact Information

Nancy Lee

Mobile:+86 18931803806