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Código da Operação: RFSR-CT-2015-00022

Acrónimo: FREEDAM

Referência: RFSR-CT-2015-00022 FREEDAM

Título: Free from damage connections

Área Científica: Construção metálica e mista

Síntese do Projeto: The proposed research is aimed at the development of a new design strategy whose goal is the design of connections able to withstand without any damage the rotation demands due to seismic events, namely “Free From Damage Connections”. Such innovative beam-to-column connections are equipped with friction dampers which are located at the bottom flange level of the connected beam to dissipate the earthquake input energy. The friction resistance is calibrated by acting on the number and diameter of bolts and their tightening torque governing the preloading. The flexural resistance results from the product between the damper friction resistance and the lever arm. The connections are conceived to exhibit wide and stable hysteresis loops without any damage to the connection steel plate elements. Therefore, the basic idea of the work is inspired to the strategy of supplementary energy dissipation, but it is based on the use of damping devices under a new perspective. In fact, while passive control strategies have been commonly based on the integration of the energy dissipation capacity of the primary structure by means of a supplementary dissipation coming from damping devices, conversely, the FREEDAM design strategy is based on the use of friction dampers conceived in such a way to substitute the traditional dissipative zones of MRFs, i.e. the beam ends. The development of FREEDAM connections has to be considered, on one hand, a first important goal because of the benefits coming from the cancellation of the connection repair costs in the aftermath of a seismic event and, on the other hand, a step towards the ambitious goal of free from damage buildings which will require, additionally, the identification of connection details, between non-structural components and primary structure, able to prevent also the damage to non- structural components (cladding panels, ceilings, plant facilities, etc.) and systems to allow the structural recentering after severe seismic events.

Investigador Responsável: Doutor Luís Simões da Silva

Programa de Financiamento: RFCS

Instituição Financiadora: Commission Of The European Community

Data de início: 01-07-2015

Data de conclusão: 30-06-2018

Instituições participantes no Projeto: Universita Degli Studi Di Salerno (Coordinator), Universite de Liege; Università Di Napoli Federico II; Universidade de Coimbra; FIP INDUSTRIALE SPA; O FELIZ - Metalomecânica, S.A.

Custo total elegível (EUR): 1.449.860,00€

Apoio financeiro da UE: 869.915,00€

Apoio financeiro público nacional: 100.724,00€

Técnico do Projeto: Marta Mateus

Contacto: 239247020