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| Name | Isolation rubber bearing |
| Vibration isolation rubber bearing is an important structural seismic technology, which can reduce the impact and damage of earthquake on building structures by using the elastic and damping properties of rubber. Vibration isolation rubber bearings mainly include plate rubber bearings and lead core vibration isolation rubber bearings (LRB lead core vibration isolation rubber bearings) two types, they play a key role in building earthquake isolation. |
1. Plate rubber support: This support is composed of multiple layers of natural rubber and at least two layers of the same thickness of thin steel plate inlaid, bonded, vulcanized, mainly used for Bridges and other structures. It can withstand vibration and seismic loads during operation, and absorb and disperse seismic energy through elastic deformation of rubber, thus protecting the superstructure from damage. |
| 2. Lead core isolation rubber bearing (LRB lead core isolation rubber bearing) : This is a support for isolation structures, by pressing lead core into the center of the RB support. Lead core has good plastic deformation capacity and energy absorption capacity, and can be integrated with rubber bearings to follow shear deformation. The bearing combines the stability recovery device of rubber bearing and the energy absorption device of lead to form a vibration isolation device with a damping mechanism. LRB bearing adjusts the damping size by the size of lead core, has good mechanical properties, simple structure and high cost performance, and has been widely used in engineering. | |
| Features | 1. Structural requirements: The seismic isolation rubber bearing is composed of the respective advantages of steel plate and rubber, and the lead rod or viscous material is added in the manufacturing process to provide the appropriate damping ratio and lateral stiffness. |
| 2. Durability and basic mechanical properties: Vibration isolation rubber bearing has good aging resistance, oxidation resistance and high temperature resistance. Engineering investigations in Japan and other countries show that LRB supports are basically the same as RB supports, and even after 100 years of use, its internal rubber is still intact. | |
| Application scenario | Seismic isolation rubber bearings are widely used in schools, hospitals, airport terminals, museums and other important buildings and lifeline projects. By extending the natural vibration period of the structure and increasing the damping of the structure, the upward transmission of seismic energy is reduced, and the earthquake damage is greatly reduced. |
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