Construction Projects

1. Brife introduction

High Damping Rubber Bearing is constituted of a series of vulcanized rubber layers separated by reinforcing steel plates, support vertical load and is receptible to deformation and rotation simultaneously.
In addition, this seismic bearing can control deformations of superstructure and reduce the seismic force which delivered to substructure by viscous damping and friction of rubber molecules due to mixing rubber and viscous materials together.

2. Feature

a. Support hysteresis characteristics, significant energy consumption;
b. Rubber formula improvement, the equivalent damping ratio can reach more than 12%;
c. Maintenance cost is low (no need other damping device);
d. Large residual deformation after the earthquake, don& acute;t need to change;
e. High damping bearing surface covered with rubber cover, is not affected by ozone, ultraviolet ray, protect the internal rubber has better aging resistance, 50 years of equivalent damping ratio less than 2%;
f. The temperature dependency of HDR high damping rubber is low, it is widely used in different climate regions;
g. HDR high damping rubber and natural rubber has a superior creep properties;
h. The environmental protection free from contamination.

3. Properties of HDRB

- Low hardness : shear modulus 0.8MPa / Damping Rate 15%
- Mid-hardness : shear modulus 1.0MPa / Damping Rate 15%
- High hardness : shear modulus 1.2MPa / Damping Rate 14%