| The price of rubber bearings for isolated buildings is competitive |
Hengshui Zhentai is a professional manufacturer of bearings and various shock absorption products. The price of bearings is complete. The manufacturer has strong technology and large specifications. Old manufacturers can place orders with confidence.
High damping isolation rubber bearing, that is, domestic high resistance isolation rubber bearing, also called HDR bearing, is designed according to the national standard GB20688 Natural rubber Various additives are added to improve the damping performance of rubber (increase hysteresis loss and reduce its storage modulus), and then the rubber with damping effect is made of a kind of rubber bearing similar to the ordinary rubber bearing structure steel plate And rubber through thermal vulcanization.
This product has good isolation performance and wide application range. It is a new type of bridge and housing construction product with high cost performance ratio. Because of its simple manufacturing process and reliable mechanical properties, it has been widely used and developed after the 5.12 earthquake.
1、 Product features
1. Trinity of vertical bearing capacity, horizontal restoring force and damping (energy absorption);
2. Hysteresis characteristics of bearing (load deformation curve) are full and energy consumption is significant;
3. The rubber formula is improved, and the equivalent damping ratio can reach more than 12%;
4. Low maintenance management cost (no need other Damping device);
5. The residual deformation is small after a major earthquake, so replacement is unnecessary;
6. 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. The 50 year equivalent damping ratio is reduced by less than 2%;
7. HDR high damping rubber has low temperature dependence and is widely used in different climatic regions;
8. HDR high damping rubber has superior creep performance as natural rubber;
9. Environmental protection and purity.
2、 Design Principle
Vertical bearing: provide stable and reliable vertical bearing capacity through stiffening steel plate to ensure the safety and reliability of daily use of buildings.
Horizontal force: natural rubber has high strength and reliable bonding force with steel plate. In the horizontal direction, when withstanding daily vibration, wind load and huge shock wave shock in earthquake, it ensures that the building will not lose its function due to sudden internal damage.
Theoretical basis of seismic isolation design: use the special damping formula performance to consume the horizontal vibration energy transmitted in the earthquake. When the earthquake comes, provide vertical support for the building. The horizontal direction will not transfer all the energy to the building, and convert the vibration energy into heat to consume in the seismic wave revival action, It can greatly reduce the wave damage effect of horizontal seismic force borne by buildings. Thus, the destructive ability of the earthquake to the building body is reduced.
3、 Technical parameters
Vertical bearing capacity: 204kN-21206kN
Design angle: 0.006rad and 0.008rad
Equivalent damping ratio:>10%
Bearing displacement: the design displacement of sliding bearing along the bridge direction is ± 100mm and ± 150mm, and the design displacement across the bridge direction is ± 30mm; The normal design shear strain of fixed type is 1.0, and the earthquake is 2.0
Friction coefficient: sliding bearing design friction coefficient is 0.03
Applicable temperature range: - 40 ℃ - 60 ` C
