Friction Pendulum Bearing (FPB): Sliding‑Pendulum Seismic Isolation For Buildings

The Friction Pendulum Bearing (FPB) is a sliding seismic isolation device composed of a concave spherical base, sliding block, upper connection plate, low-friction wear-resistant sliding layer and limit shear bolts. Adopting the simple pendulum mechanism, it provides effective seismic protection.

Under normal conditions, shear bolts lock the bearing to stably bear structural loads. When seismic horizontal force exceeds the threshold, the bolts shear off, allowing the superstructure to slide and swing along the concave spherical surface. This extends the structural vibration period to avoid seismic energy resonance and dissipates earthquake energy via sliding friction. After earthquakes, gravity-driven self-centering restores the bearing to its original position and minimizes residual displacement.

• Load-independent isolation period: The isolation period is determined by the spherical curvature radius, free from upper structural load changes.
• Excellent self-centering performance: Automatic reset by structural self-weight with negligible permanent deformation after earthquakes.
• High vertical bearing capacity: Suitable for heavy-load and large-span structural systems.
• Lead-free eco-friendly design: Compliant with strict environmental standards for overseas projects.

Large exhibition centers, stadiums, high-speed railway stations, long-span public buildings, heavy-duty workshops and bridges. Ideal for new construction and retrofitting projects in high-seismic zones and regions with rigorous environmental requirements.

The sliding friction surface is the core component of FPB. Strict material quality control is required during production. The curved sliding surface shall be well protected from impact and scratches during installation to maintain stable long-term friction performance.