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Friction Pendulum Seismic Isolation Support (FPI)

Friction pendulum seismic separation support (FPI-D, continuous part)

Planar friction strut (FSB-S, expansion joint)

  • Friction pendulum-type seismic bulkhead that dissipates seismic energy through friction between special friction materials and polished stainless curved surfaces, and provides restoring force through pendulum motion.
  • A seismic bulkhead that maximizes stability and economy by preventing vertical bumps by arranging plane friction type struts on the expansion joints and preventing damage to the upper girder and expansion joints.

Reliability test

Application of Flat Friction Struts


Problems when the entire bridge is applied only as a friction pendulum type seismic bulkhead
  • Steps at expansion joints in the event of elongation or contraction of the bridge upper girder.
Expansion joint Application of planar friction struts
  • Solution by Post Arrangement Considering Vertical Steps in Bridge Structure
  • Vertical steps are not generated by applying plane friction type struts to expansion joints. (Increased durability of expansion joints)