The bridge bearing manufacturer provides you with common types of seismic isolation bearings

Due to the rapid development of social development and cultural life, many new construction machinery and equipment will also appear during the construction project. The following are some common types of vibration isolation bearings, which are introduced by the manufacturer of bridge bearings:

The shock-isolated bearing refers to the supporting equipment set to meet the seismic requirements. The isolation layer shall be hoisted between the superstructure and the subgrade, and the rubber isolation bearing shall be assembled, with soft joints with the pavement. According to this technical feature, it can offset 60%~90% of the kinetic energy of earthquake disasters, and has good seismic protection effect.

Seismic isolation bearings for general engineering buildings are divided into rubber bearings, lead rubber bearings and high damping rubber bearings according to key raw materials

1. Rubber bearing (LNR): plate rubber anti-seismic bearing made of rubber. Rubber isolation bearing has good durability, low cycle time fatigue resistance, high temperature gas aging resistance, ozone aging resistance, alkali resistance and water resistance. Its service life can reach 80~100 years, during which the seismic physical performance is not easy to change significantly.

2. Lead-core rubber bearing (LRB): plate-type rubber isolation bearing with longitudinal lead core in its internal structure. The backward damping plastic deformation caused by lead core can not only bear the structural force and horizontal force, but also absorb energy and give horizontal recovery capacity according to the rubber.

3. High damping rubber bearing (HDR): a plate-type rubber isolation bearing with a variety of mutual admixtures added to the rubber to improve the damping characteristics of the rubber (improve the backward damage of the rubber and reduce its storage strain rate). HDR has good seismic performance and a wide range of applications, with the following advantages: vertical bearing capacity, horizontal recovery capacity, damping (energy absorption) trinity; The hysteretic characteristic (load-deformation curve) of the support is circular, and the energy consumption is obvious; The rubber configuration is improved, and the equivalent circuit damping ratio can reach more than 12%. Low maintenance and management cost (no other damping equipment); The residual deformation after a large earthquake is small, so it does not need to be replaced; Safety and environmental protection, etc.

In addition to the three types of rubber isolation bearings mentioned above, the common engineering building isolation bearings also include engineering building friction pendulum isolation bearings, elastic double rocker bearings, etc.

4. Friction pendulum isolation bearing (FPS) of engineering buildings: a bearing that increases the vibration period and rolling boundary of the structure according to the vibration of the ball, and the friction consumes the kinetic energy of the earthquake disaster to complete the seismic action. The vibration isolation bearing of the friction pendulum is an arc rolling friction management system. The sliding surface design scheme increases the overall vibration period of the structure, thus greatly reducing the driving force amplification effect caused by the earthquake. It has strong resistance to horizontal torsion, strong calibration ability and good reliability. Because of its shape design, self-calibration function, high stability and other advantages, friction pendulum is outstanding in isolation bearings. Photo

5. Elastic double rocker bearing (ESB): a vibration isolation bearing composed of rubber bearing, movable raw materials, movable control panel and upper and lower connecting plates. When the elastic double-rocker bearing is horizontally rolling, the bending stiffness of the driving force is zero, it is not sensitive to the frequency band characteristics of ground motion, and the rolling offset is large, which can be well applied to the seismic resistance of the soft foundation treatment site.

The general types of isolation bearings introduced by the manufacturer of bridge bearings. If you want to know more about isolation bearings, you can leave a message or contact us.