Seismic isolator plays an important role in reducing potential damage caused by earthquakes, minimizing the disruption to people's lives and allowing business activities to continue. Choosing an appropriate seismic isolator for your project is definitely crucial to the seismic isolation performance of the whole project.
Here, we briefly introduce seismic isolator comparison and seismic isolator selection to help you choose the right seismic isolator perfect for your projects.
Both lead rubber bearing and high damping rubber bearing have a high damping ratio with a coefficient of 20% ~30% and 10% ~ 25% respectively. Both can effectively absorb and dissipate seismic energy, ensure a great seismic isolation and be independently used in various seismic isolation systems. As a result, they are widely used in buildings built in areas where the seismic intensity scale is generally VIII or XI level.
Typically, the maximum achievable damping ratio of lead rubber bearing is higher than that of high-damping bearing, which makes it suitable for projects with higher energy dissipation requirements.
Natural rubber bearing has a low damping ratio with a coefficient of 2% ~ 3% and lower energy dissipation capacity, therefore, it often works with dampers to form a seismic isolation system. When being used separately, it is commonly used in buildings built in areas where the seismic intensity scale is generally VII level or below.
Natural rubber bearing
The horizontal stiffness of natural rubber bearing is lower than that of lead rubber bearing of the same diameter. The lower the horizontal stiffness is, the longer the natural vibration period of the structure, the lower the seismic response, the greater the seismic isolation effect. Therefore, natural rubber bearing is your preferred choice for isolation layer.
Lead rubber bearing
The addition of lead increases the early stiffness of the rubber bearing and allows it to resist the action of wind load and small vibrations of the structure.
Lead rubber bearings are generally arranged at the 4 corners and perimeter of the isolation layer to adjust the eccentricity between the stiffness center of isolation layer and the center of mass of superstructure.
High damping rubber bearing
High damping rubber bearings are made of eco-friendly materials and contain no heavy metal and other pollutant materials. Therefore, it is suitable for buildings built in areas with higher environment protection requirements.
High damping rubber bearing is the new trend of international seismic isolation technology development, representing the direction of future technological development.
Currently, seismic isolators are mainly made into round shapes with a diameter ranging of 200 mm to 1200 mm.
You may choose seismic isolator with corresponding diameters according to your specific demands.
Low rise buildings 200 mm to 400 mm
Medium rise buildings 400 mm to 800 mm
High rise buildings 800 mm to 1200 mm
In addition to supply standard specifications of natural rubber bearings, lead rubber bearings and high damping rubber bearing, we also accept customized services to meet your specific needs.
If you have custom demands, please contact us and attach your drawings, sizes and standards required.
Provide Seismic Isolators in A Variety of Types, Sizes and Customized Services
