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Lead Rubber Bearing
LRB_Dimension Table.pdf
 



LRB is the elastomeric bearing to absorb and scatter the horizontal energy generated during earthquakes. LRB solves problems for temperature dependency, durability and repeated loads by inserting a leadcore into the bearing composed of rubber and steel plate. Moreover, LRB improves functions of the elastomeric bearing by inserting Lead Protecting Rings




- For LRB, a lead plug is inserted into the center of the elastomeric bearing to absorb and scatter the horizontal energy generated during earthquakes.

- When earthquakes occurs, LRB can extend the natural period of a bridge and reduce the horizontal power caused by the weight. It can be a guideline to economical lower structure designs





- LRB can resist against short-term weights such as wind power or braking load by utilizing the elastomeric stiffness of lead. It has stability against all time weights. It easily adjusts to slow displacement such as temperature displacement and does not deliver large weights to the lower structure

- By using the plastic deformation property of lead, it absorbs and scatters earthquakes energy.

- It can restore its original position after earthquakes are stopped. No additional repair or maintenance required.

- When an LRB is applied normal force or take place shearing deformation, to stick out lead can prevent by inserting Lead Protecting Rings.












- LRB is the most frequently used bearing for earthquakes.

- From the functional perspectives of a bridge, it supports excellent design of a continuous bridge.

- The lead molecules that experience earthquakes revert to the original molecular structure at room temperature.

- Due to the features of lead, it has high resistivity against winds or braking load (short-term weight) to improve the usability and less temperature ability (long-term weight) is applied.

- LRB can improve flexibility in your design by arbitrarily adjusting the weight and reducing power for each bridge characteristics.

- The reverting power of rubber does not generate residual displacement after earthquake.

- LRB is a kind of rubber bearing, it absorbs shock loads to improve the durability of the structure and it is advantageous in the noise.