Application of reversible friction dampers to beam‐to‐column joints with CFSTs

Abstract

Current building codes prescribe seismic design approaches that ensure safety by allowing structures to dissipate energy through extensive inelastic deformations. While effective in preventing collapse, this philosophy accepts damage, which results in high repair costs and long periods during which the building cannot be used. To overcome these drawbacks, new structural solutions have been developed with the aim of improving seismic resilience while limiting damage. Among these, systems using friction devices at beam‐to‐column connections have received increasing attention. Such devices dissipate seismic energy without compromising the main structural members and can be restored with straightforward maintenance, such as bolt re‐tightening or replacement of friction plates. Well‐known examples are the Sliding Hinge Joint and the FREEDAM connection. However, these technologies have been studied mainly for joints involving double‐tee members, whereas their application to hollow section columns has not yet been explored.