Simplified assessment of combined intervention for the seismic and energetic retrofit of a school building in Padua (Italy)

According to European policies a reduction of 55% in CO2 emissions is expected within 2030 and EU would be the first climate-neutral economy and society within 2050. The building and construction sector is responsible for 34% of final energy use and 37% of energyrelated CO2 emissions: improving envelopes and energy systems on existing buildings, thus, becomes a valid solution to implement European policies on climate change mitigation and adaptation to its effects. Furthermore, in the last years researchers and designers paid growing attention to combined seismic and energy intervention solutions, aiming at extending building heritage service life as well, by increasing its resilience and safety. In this paper a simplified and quick method for assessing energy and seismic retrofit intervention strategies is presented and applied to an existing school building owned by the Municipality of Padua (Italy). Performance indicators are assessed in separate phases and subsequently aggregated by means of a multi-attribute decision-making (MADM) method. Seismic vulnerability assessment returned a capacity-demand ratio, whereas energy efficiency improvement was assessed based on the annual primary energy reduction. By applying the TOPSIS multi-attribute method it was possible to aggregate performance values obtained in the previous phases; hence, a ranking was drawn up to evaluate the best-combined retrofit measure.