Multilayer precast facade panel: structural optimization for the energy retrofitting and for sustainable constructions

Existing buildings are characterized by a large energy consumption due to heating and air-conditioning. Hence, their energy retrofitting has to be considered with a high priority. In this perspective a multi-layer prefabricated façade sandwich panel characterized by an internal insulation layer and by two external layers of Textile Reinforced Concrete (TRC) is proposed for the application on existing building walls. Just the insulating material is used to transfer the shear be-tween the two structural TRC layers. The main goal of the work is to provide the mechanical characterization of this panel. The research is developed at material, cross-section and full-structure level. In this paper the global sectional behaviour is investigated: results concerning bending tests on sandwich beams are proposed, together with the developed numerical simulations.