Application Scenarios Of Seismic Isolation Products

Seismic isolation products, with lead-rubber bearings, sliding friction isolation bearings, natural rubber bearings as the core, operate on the principle of isolating the transmission of seismic energy to the building superstructure through the elastic deformation or sliding friction of the bearings. This significantly reduces the seismic response of structures, making them suitable for construction scenarios that require key protection, are sensitive to vibration, or have special functional requirements. Specific applications are as follows:

These bearings are ideal for several key scenarios. First, they apply to crowd-intensive key fortification buildings such as schools, hospitals, gymnasiums, and theaters. Second, they suit large public buildings including super high-rise buildings (over 30 floors), long-span convention centers, and high-speed railway station buildings. Third, they are applicable to vibration-sensitive industrial facilities like precision instrument workshops, data centers, and chip production lines. Fourth, they fit new residential buildings and commercial complexes in high-intensity seismic zones (seismic intensity of 8 degrees and above). The key selection requirements include a vertical bearing capacity of 100–5000 kN, horizontal equivalent stiffness of ≥1.2×10³ kN/m, isolation efficiency of 60%–80%, and fatigue resistance of ≥200 cycles.

This type of bearing is widely used in multiple scenarios. It is suitable for the bearing systems of highway bridges, railway bridges, and urban rail transit bridges. It also applies to seismic reinforcement projects for low-rise masonry residential buildings (1–6 floors) and old communities. Additionally, it fits special structures such as cold storage facilities, storage tanks, and water towers, as well as buildings in areas prone to foundation settlement. The key selection criteria are a coefficient of friction of ≤0.03, temperature adaptability ranging from -40℃ to 60℃, sliding displacement of ≥±150 mm, and excellent aging resistance.

Natural rubber isolation bearings have their unique application fields. They are primarily used for the seismic protection of cultural relics, ancient buildings, and historical features, thanks to their lead-free property that avoids damaging the original appearance of these buildings. They are also suitable for buildings with high comfort requirements, such as kindergartens and nursing homes. Moreover, they apply to mid-to-low-rise civil buildings in low-intensity seismic zones (seismic intensity of 6–7 degrees). When selecting such bearings, focus should be on stable elastic modulus, vertical compressive deformation of ≤3%, heavy metal-free composition, and a good balance between isolation performance and structural stability.

Friction pendulum isolation bearings are designed for high-demand scenarios. They are applicable to heavy-duty bridge projects like cross-sea bridges and long-span arch bridges. They also suit industrial buildings with extremely high safety requirements, including nuclear power plants and hydropower stations. Furthermore, they are ideal for buildings in harsh environments such as high-altitude areas, regions with strong UV radiation, and corrosive zones. The key selection requirements cover a vertical bearing capacity of up to 10,000-ton level, strong horizontal self-centering capability, and outstanding weather resistance and corrosion resistance.