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Colloque soutenu par DMC, PAMO et DCPhys: Métamatériaux sismiques Sébastien Guenneau (Institut Fresnel, UMR CNRS 7249 à Aix-Marseille Université), [email protected] Stéphane Brûlé (Agence Rhône Alpes de Ménard, Nozay), [email protected] Using analogies between transformational optics to control surface electromagnetic waves propagating at structured metal-dielectric interfaces and transformational elastodynamics to control Rayleigh waves propagating at the surface structured soils, it has been proposed (http://www.cnrs.fr/insis/recherche/faits-marquants/2010/cape-invisibilite-seisme.htm) to detour Rayleigh waves around a building by concentric layers of soil of varying density and Young modulus, so that vulnerable buildings could someday be shielded from damaging earthquakes by surrounding them with seismic invisibility cloaks. A first prototype of such a seismic cloak has been tested experimentally in 2012 (http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.133901) by the soil dynamic team of Stéphane Brûlé at the civil engineering Ménard company. In principle, the concept of seismic cloak could be extended to create protective barriers that divert earthquake energy away from sensitive facilities say power plants, with columns of concrete buried in soil, or even above the soil, notably in alluvium basin where seismic site effects can be observed. A number of research groups in France (e.g. researchers at ISTerre in Grenoble), Europe (notably in Italy, Greece, Romania, Swiss and United-Kingdom) and indeed worldwide (China, Japan, Turkey and USA) have since then started to work on large scale mechanical materials. The present symposium will offer a unique occasion to exchange ideas and viewpoints on this emerging topic which lies at the interface between optics, mechanics, geophysics and civil engineering. 8h30 : Stéphane Brûlé (Inst. Fresnel, Marseille): Enjeux des métamatériaux sismiques pour le Génie Civil 8h45 :Federico Bosia (LOMC Le Havre): Métamatériaux mécaniques à grande échelle pour applications sismiques 9h00 :Richard Craster (Imperial Coll. London, UK): Ultra-low broad frequency stop-bands in structured elastic media 9h15 :Bogdan Ungureanu (TU Iasi, Roumanie): Exemples de metamateriaux sismiques existants 9h30 :Andrea Colombi (Imperial Coll. London, UK): Scaling metamaterials to the seismic wavelength: what can be done and what cannot 9h45 :Allessandro Marzani (Bologne, Italie): A multi-mass metabarrier as seismic metamaterial for Rayleigh waves 10h00 : Vasilis Dertimanis (ETH Zurich Suisse): Seismic Metamaterials: Technical Requirements and Practical Challenges 10h15 : Roberto Zivieri (Messine, Italie): Modeling and design of non-linear seismic metamaterials