What is the principle of seismic isolation bearings

Seismic isolation bearings are a device used in building structures, whose main principle is to reduce or eliminate the transmission of external forces such as earthquakes and wind loads to buildings, thereby reducing structural vibration and damage.

Seismic isolation bearings are usually composed of materials such as rubber, steel plates, and lead cores, and their working principles can be divided into the following aspects:

Elastic deformation: Isolation bearings have a certain degree of elasticity. When an earthquake or other external force is applied to a building, the bearings will undergo elastic deformation, absorb and disperse some energy, and reduce structural vibration.

Isolation effect: Isolation bearings can separate the building from the foundation, forming an isolation layer that reduces the force of seismic waves transmitted to the building. This is because seismic isolation bearings have lower stiffness and higher damping characteristics, which can effectively reduce the transmission of seismic waves.

Energy dissipation: Materials in seismic isolation bearings, such as rubber or lead cores, have high energy dissipation capabilities. When earthquakes or other external forces act on buildings, these materials absorb and dissipate energy, reducing the vibration amplitude of the structure.