Innovative self-centering multi-stable dampers with high-performance properties and bi-stable metapanels with auxetic lattices for performance-based steel design in seismic engineering

Alper Kanyilmaz (Responsabile Scientifico)

Given the emerging nature of metamaterials and metastructures, which, with proper repeated patterns and/or repeated nonlinear elements are capable of controlling amplitude-dependent behaviour in nonlinear media, MULTI-STABLE proposes to introduce vibration mitigation concepts that capitalise on the control of nonlinear stability effects and develop some measures for protecting low- mid-rise steel structures and existing reinforced concrete (RC) structures against strong earthquakes. To this end, two complementary solutions are developed in MULTI-STABLE, focusing on structural Metabraces and nonstructural Metapanels. Through simulations and experiments at different scales, the aim is to demonstrate the potential of these innovative solutions that rely on multi-stability, self-centering and nonlinear elasticity in Metabraces and Metapanels, in enhancing structuralprotection. Adoption of such non-conventional designs allows the shift of the current passive seismic protection of buildings from displacement-based to velocity-based devices that, with nonlinear elasticity, are capable of mobilising the dissipation in the whole structure within performance-based seismic design (PBSD).

Contribution to SDG: 9, 11, 13