Universidad Politécnica de Madrid, Spain
Conventional approaches in seismic design dissipate most of the energy input by the earthquake through plastic deformations in regions of the main structure that also support the gravity loads. This involves important damage spread throughout the structure. Innovative approaches based on the use of energy dissipation devices (EDDs) apply a completely different strategy. The EDDs release the main structure from dissipating energy and limit its responsibility to only (or mainly) sustaining the gravity loads as the building deforms laterally. ¬The seismic capacity of the structure is entrusted entirely (or mainly) to EDDs. Ultimately, the usefulness of EDDs is fully acknowledged but its use in Europe is still very incipient. Two impediments to the widespread implementation of EDDs is the lack of, or the over-conservative requirements of code provisions for the seismic design of structures with EDDs. This presentation briefly reviews recent developments on EDDs and procedures for verifying buildings with EDDs that have tentatively been adopted in the draft-new-Eurocode 8.