High damping rubber bearing, which is to add various compounding agents to natural rubber to improve the damping performance of rubber (increase hysteresis loss, reduce its storage modulus), and then use this rubber with damping effect to It is a laminated product formed by hot vulcanization of steel plate and rubber with similar structure of ordinary rubber bearing. The product has good seismic isolation performance and a wide range of applications. It is a new type of building isolation product with high cost performance.
High damping rubber bearing (HDR), similar with lead rubber bearing, belongs to seismic isolation bearing. It is composed of special rubber with excellent damping attribute, sandwiched together with layers of steel. Damping is an influence within or upon an oscillatory system that has the effect of reducing, restricting or preventing its oscillations. Thus, bridge bearing made of high damping rubber has excellent vibration reduction ability. Available with excellent flexibility and high restoring ability, high damping rubber bearing can absorb some input energy of the earthquake before the energy is transmitted to the substructure and can be restored after the earthquake.
High damping rubber bearing structure
Through improving the rubber formula, the damping of rubber material is increased, thus, the damping ratio of high damping rubber bearing can approach to 15% - 18%. During the earthquake, the high damping rubber bearing will have excellent seismic effect by producing large deformation and small rigidity. Because the elastic stiffness of high damping rubber bearing relies on its deformation degree. When the deformation is small, the stiffness is large, otherwise, the deformation is large and the stiffness will be small. And the high damping rubber bearing utilizing this principle generates excellent seismic isolation function.
● High damping rubber bearing features high vertical loading capacity, b recovery ability and high damping ability.
● Full of hysteretic behavior, high damping rubber bearing can produce seismic isolation effect for small, middle or big earthquake.
● High damping rubber bearing, itself producing the seismic isolation function, does not need install other devices. Thus, the cost of maintenance and repair is reduced.
● Temperature influences on the flexibility and damping performance of the high damping rubber bearing is extremely small, thus, high damping rubber bearing has a wide range of applied field.
● Due to adopting the new developed nature rubber, high damping rubber bearing has excellent creep property.
● Covered with EPDM, the internal rubber of the high damping rubber bearing is completely protected which is resistant to the ozone and ultraviolet, thus, the high damping rubber bearing has better aging-resistant ability.
● Vertical bearing capacity, horizontal restoring force, and damping (energy absorption) in one; 2. The hysteretic characteristics of the bearing (load-deformation curve) are full and the energy consumption is significant;
● The rubber formula is improved, and the equivalent damping ratio can reach more than 12%;
● Low maintenance and management costs (no need for other damping devices);
● The residual deformation after the big earthquake is very small, no need to replace;
● The surface of the high damping bearing is covered with a rubber protective layer, which protects the internal rubber from ozone and ultraviolet rays, and has better aging resistance, and the equivalent damping ratio in 50 years is reduced by less than 2%;
● HDR high damping rubber has low temperature dependence and is widely used in different climatic regions;
● HDR high damping rubber has the same superior creep performance as natural rubber;
● Environmental protection and no pollution.
