Friction Pendulum System (FPS) is a type of friction damper that dissipates the seismic energy at the interface of a sliding surface.
The superstructure is isolated from the foundation using specially designed concave surfaces and bearings to allow sway under its own natural period during seismic events.
FPS is based on the three following pillars:
• Articulated friction slider;
• Spherical concave sliding surface;
• Enclosing cylinder for lateral displacement restraint.
The spherical concave causes a restoring force when the structure reaches its maximum displacement and returns the structure to its initial position. As such, the structure remains without residual deformation at the end of a seismic event.